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148. H.-S. Kim, I. M.-Sero, V. G.-Pedro, F. F.-Santiago, E. J. J.-Perez, and N.-G. Park, J. Bisquert, Mechanism of carrier accumulation in perovskite thin-absorber solar cells, Nature Commun. 2013, 4, 2242.

147. N.-G. Park, Organometal perovskite light absorbers toward a 20% efficiency low-cost solid-state mesoscopic solar cell, J. Phys. Chem. Lett. 2013, 4, 2423-2429.

146. J.-W. Lee, J.-D. Hong, and N.-G. Park, Sixfold enhancement of photocurrent by surface charge controlled high density quantum dot coating, Chem.Commun. 2013, 49, 6448-6450.

145. H.-S. Kim, J.-W. Lee, N. Yantara, P. P. Boix, S. A. Kulkarni, S. Mhaisalkar, M. Gratzel, and N.-G. Park, High efficiency solid-state sensitized solar cell-based on submicrometer rutile TiO2 nanorod and CH3NH3PbI3 perovskite sensitizer, Nano Lett. 2013, 13, 2412-2417.

144. M. S. A. S. Shah, K. Zhang, A. Reum Park, K. S. Kim, N.-G. Park, J. H. Park, and P. J. Yoo, Single-step solvothermal synthesis of mesoporous Ag-TiO2-reduced graphene oxide ternary composites with enhanced photocatalytic activity, Nanoscale 2013, 5, 5093-5101.

143.N. K. Huu, D.-Y. Son, I.-H. Jang, C.-R. Lee, and N.-G. Park, Hierarchical SnO2 nanoparticle-ZnO nanorod photoanode for improving transport and lifetime of photoinjected electrons in dye-sensitized solar cell, ACS Appl. Mater. Interfaces 2013, 5, 1038-1043.

142.J.-W. Lee, D.-Y. Son, T. K. Ahn, H.-W. Shin, I. Y. Kim, S.-J. Hwang, M. J. Ko, S. Sul, H. Han, and N.-G. Park, Quantum-dot-sensitized solar cell with unprecedentedly high photocurrent, Sci. Rep. 2013, 3, 1050.

141. J.-W. Lee, J.-H. Im, and N.-G. Park, Quantum confinement of CdSe induced by nanoscale solvothermal reaction, Nanoscale 2012, 4, 6642-6648.

140. Y. Li, D.-K. Lee, J. Y. Kim, B. Kim, N.-G. Park, K. Kim, J.-H. Shin, I.-S. Choi, and M. J. Ko, Highly durable and flexible dye-sensitized solar cells fabricated on plastic substrates: PVDF-nanofiber-reinforced TiO2 photoelectrodes, Energy Environ. Sci. 2012, 5, 8950-8957.

139. K. S. Lee, J. Kwon, J. H. Im, C. R. Lee, N.-G. Park, and J. H. Park, Size-tunable, fast, and facile synthesis of titanium oxide nanotube powders for dye-sensitized solar cells, ACS Appl. Mater. Interfaces 2012, 4(8), 4164-4168.

138. J.-H. Im, J. Chung, S.-J. Kim, and N.-G. Park, Synthesis, structure, and photovoltaic property of a nanocrystalline 2H perovskite-type novel sensitizer (CH3CH2NH3)PbI3, Nanoscale Res. Lett. 2012, 7, 353.

137. S. Y. Bang, M. J. Ko, K. Kim, J. H. Kim, I.-H. Jang, and N.-G. Park, Evaluation of dye aggregation and effect of deoxycholic acid concentration on photovoltaic performance of N719-sensitized solar cell, Synth. Met. 2012, 162, 1503-1507.

136. H.-S. Kim, C.-R. Lee, J.-H. Im, K.-B. Lee, T. Moehl, A. Marchioro, S.-J. Moon, R. Humphry- Baker, J.-H. Yum, J. E. Moser, M. Gratzel, and N.-G. Park, Lead iodide perovskite sensitized all-solid-state submicron thin film mesoscopic solar cell with efficiency exceeding 9%, Sci. Rep. 2012, 2, 591.

135. J.-S. Lee, I.-H. Jang, and N.-G. Park, Effect of oxidation state and crystallinity of tungsten oxide interlayer on photovoltaic property in bulk hetero-junction solar cell, J. Phys. Chem. C 2012, 116(25), 13480-13487.

134. M.-J. Kim, and N.-G. Park, Urea as a long-term stable alternative to guanidium thiocyanate additive in dye-sensitized solar cell, Appl. Surf. Sci. 2012, 258(22), 8915-8918.

133. M.-J. Kim, Y.-J. Yu, J.-H. Kim, Y.-S. Jung, K.-Y. Kay, S.-B. Ko, C.-R. Lee, I.-H. Jang, Y.-U. Kwon, and N.-G. Park, Tuning of spacer groups in organic dyes for efficient inhibition charge recombination in dye-sensitized solar cells, Dyes Pigm. 2012, 95(1), 134-141.

132. H.-S. Kim, C.-R. Lee, I.-k Jang, W. Kang, and N.-G. Park, Effect of overlayer thickness of hole transport material on photovoltaic performance in solid-sate dye-sensitized solar cell, Bull. Korean Chem. Soc. 2012, 33(2), 670-674.

131. S.-B. Ko, A.-N. Cho, M.-J. Kim, C.-R. Lee, and N.-G. Park, Alkyloxy substituted organic dyes for high voltage dye-sensitized solar cell: Effect of alkyloxy chain length on open-circuit voltage, Dyes Pigm. 2012, 94(1), 88-98.

130. H.-S. Kim, S.-B. Ko, I.-H. Jang, and N.-G. Park, Improvement of mass transport of the [Co(bpy)3]II/III redox couple by controlling nanostructure of TiO2 films in dye-sensitized solar cells, Chem. Commun. 2011, 47, 12637-12639.

129. S.-R. Jang, K. Zhu, M. J. Ko, K. Kim, C. Kim, N.-G. Park, and A. J. Frank, Voltage-enhancement mechanisms of an organic dye in high open-circuit voltage solid-state dye-sensitized solar cells, ACS Nano 2011, 5(10), 8267-8274.

128. J.-H. Im, C.-R. Lee, J.-W. Lee, S.-W. Park, and N.-G. Park, 6.5% efficient perovskite quantum dot-sensitized solar cell, Nanoscale 2011, 3, 4088.

127. W.-S. Jeong, J.-W. Lee, S. Jung, J. H. Yun, and N.-G. Park, Evaluation of external quantum efficiency of a 12.35% tandem solar cell comprising dye-sensitized and CIGS solar cells, Sol. Energy Mater. Sol. Cells 2011, 95, 3419.

126. A. Anthonysamy, Y. Lee, B. Karunagaran, V. Ganapathy, S.-W. Rhee, S. Karthikeyan, K. S. Kim, M. J. Ko, N.-G. Park, M.-J. Ju, and J. K. Kim, Molecular design and synthesis of ruthenium(ii) sensitizers for highly efficient dye-sensitized solar cells, J. Mater. Chem. 2011, 21, 12389.

125. C.-R. Lee, H.-S. Kim, I.-H. Jang, J.-H. Im, and N.-G. Park, Pseudo first-order adsorption kinetics of N719 dye on TiO2 surface, ACS Appl. Mater. Interfaces 2011, 3, 1953-1957.

124. A. Mao, N.-G. Park, G. Y. Han, and J. H. Park, Controlled growth of vertically oriented hematite/Pt composite nanorod arrays: use for photoelectrochemical water splitting, Nanotechnology 2011, 22, 175703.

123. K. S. Lee, W. J. Lee, N.-G. Park, S. O. Kim, and J. H. Park, Transferred vertically aligned n-doped carbon nanotube arrays: use in dye-sensitized solar cells as counter electrodes, Chem. Commun. 2011, 47, 4264-4266.

122. Y. Li, W. Lee, D.-K. Lee, K. Kim, N.-G. Park, and M. J. Ko, Pure anatase TiO2 “nanoglue”: an inorganic binding agent to improve nanoparticle interconnections in the low-temperature sintering of dye-sensitized solar cells, Appl. Phys. Lett. 2011, 98, 103301.

121. B. Yoo, K.-J. Kim, Y. H. Kim, K. Kim, M. J. Ko, W. M. Kim, and N.-G. Park, Titanium nitride thin film as a novel charge collector in TCO-less dye-sensitized solar cell, J. Mater. Chem. 2011, 21, 3077-3084.

120. C.-R. Lee, H.-S. Kim, and N.-G. Park, Dependence of porosity, charge recombination kinetics and photovoltaic performance on annealing condition of TiO2 films, Front. Optoelectron. China 2011, 4, 59-64.

119. S. W. Park, K. Lee, D.-K. Lee, M. J. Ko, N.-G. Park, and K. Kim, Expanding the spectral response of a dye-sensitized solar cell by applying a selective positioning method, Nanotechnology 2011, 22, 45201.

118. J.-H. Lee, N.-G. Park, and Y.-J. Shin, Nano-grain SnO2 electrodes for high conversion efficiency SnO2-DSSC, Sol. Energy Mater. Sol. Cells 2011, 95, 179-183.

117. J.-H. Lee, W.-S. Chung, N.-G. Park, and K. Kim, Wiper coating method for PEDOT:PSS film on fabricating organic photovoltaic modules, Curr. Appl. Phys. 2010, 10, e185-e188.

116. M.-J. Kim, C.-R. Lee, W.-S. Jeong, J.-H. Im, T.-I. Ryu, and N-G. Park, Unusual enhancement of photocurrent by incorporation of Bronsted base thiourea into electrolyte of dye-sensitized solar cell, J. Phys. Chem. C 2010, 114(46), 19849-19852.

115. C. Lee, G.-W. Lee, W. Kang, D.-K. Lee, M. J. Ko, K. Kim, and N.-G. Park, Suppression of charge recombination rate in nanocrystalline SnO2 by thin coatings of divalent oxides in dye-sensitized solar cells, Bull. Korean Chem. Soc. 2010, 31(11), 3093-3098.

114. S. C. Hong, J. E. Shin, H. J. Choi, H. H. Gong, K. Kim, and N.-G Park, Prediction and evaluation of styrenic block copolymers as surface modifiers for multiwalled carbon nanotubes in α-terpineol-based pastes, Ind. Eng. Chem. Res. 2010, 49(22), 11393-11401.

113. B. Yoo, K.-J. Kim, D.-K. Lee, K. Kim, M. J. Ko, Y. H. Kim, W. M. Kim, and N.-G. Park, Method to protect charge recombination in the back-Contact dye-sensitized solar cell, Opt. Express 2010, 18(103), A395-A402.

112. K. S. Lee, H. K. Lee, D. H. Wang, N.-G. Park, J. Y. Lee, O. O. Park, and J. H. Park, Dye-sensitized solar cells with Pt- and TCO-free counter electrodes, Chem. Commun. 2010, 46, 4505-4507.

111. D. H. Yeon, K. K. Kim, N. G. Park, and Y. S. Cho, Bismuth borosilicate-based thick film passivation of Ag grid for large-area dye-sensitized solar cells, J. Am. Ceram. Soc. 2010, 93(6), 1554-1556.

110. H. J. Jo, Y. C. Choi, J.-H. Ryu, J. H. Kang, N. K. Park, D. K. Lee, and J. H. Kim, Synthesis and characterization of organic photo-sensitizers containing multi-acceptors for the application of dye-sensitized solar cells, Mol. Cryst. Liq. Cryst. 2010, 532: 55/[471]-64/[480].

109. B. Yoo, K. Kim, D.-K. Lee, M. J. Ko, H. Lee, Y. H. Kim, W. M. Kim, and N.-G. Park, Enhanced charge collection efficiency by thin-TiO2-film deposition on FTO-coated ITO conductive oxide in dye-sensitized solar cell, J. Mater. Chem. 2010, 20, 4392-4398.

108. Y. Li, K. Yoo, D.-K. Lee, J. H. Kim, N.-G. Park, K. Kim, and M. J. Ko, Highly bendable composite photoelectrode prepared from TiO2/polymer blend for low temperature fabricated dye-sensitized solar cells, Curr. Appl. Phys. 2010, 10, e171-e175.

107. S. Kim, H. Lim, K. Kim, C. Kim, T. Y. Kang, M. J. Ko, K. Kim, and N.-G. Park, Synthetic strategy of low-bandgap organic sensitizers and their photoelectron injection Characteristics, IEEE J. Sel. Top. Quantum Electron. 2010, 16(6), 1627-1634.

106. H. J. Choi, J. E. Shin, G.-W. Lee, N.-G. Park, K. Kim, and S. C. Hong, Effect of surface modification of multi-walled carbon nanotubes on the fabrication and performance of carbon nanotube based counter electrodes for dye-sensitized solar cells, Curr. Appl. Phys. 2010, 10, 165-167.

105. C. lee, W. Kang, M. J. Ko, K. Kim, and N.-G. Park, Study on the change in photovoltage by control of cell gap in dye-sensitized solar cells, J. Sol. Energy Eng. 2010, 132, 0211041-0211045.

104. N.-G. Park, Light management in dye-sensitized solar cell, Korean J. Chem. Eng. 2010, 27(2), 375-384.

103. S. Lee, I.-S. Cho, J. H. Lee, D. H. Kim, D. W. Kim, J. Y. Kim, H. Shin, J.-K. Lee, H. S. Jung, N.-G. Park, K. Kim, M. J. Ko, and K. S. Hong, Two-step sol-gel method -based TiO2 nanoparticles with uniform morphology and size for highly efficient photo-energy conversion devices, Chem. Mater. 2010, 22, 1958-1965.

102. B. Yoo, K.-J. Kim, S.-Y. Bang, M. J. Ko, K. Kim, and N.-G. Park, Chemically deposited blocking layers on FTO substrates: Effect of precursor concentration on photovoltaic performance of dye-sensitized solar cells, J. Electroanal. Chem. 2010, 638, 161-166.

101. H. Im, S. Kim, C. Park, S.-H. Jang, C.-J. Kim, K. Kim, N.-G. Park, and C. Kim, High performance organic photosensitizers for dye-sensitized solar cells, Chem. Commun. 2010, 46, 1335-1337.

100. G.-W. Lee, D. Kim, M. J. Ko, K. Kim, and N.-G. Park, Evaluation on over photocurrents measured from unmasked dye-sensitized solar cells, Sol. Energy 2010, 84, 418-425.

99. Y. J. Kim, H. J. Kim, M. H. Lee, G. I. Lim, H. Y. Song, Y. S. Choi, N.-G. Park, C. Lee, and W. I. Lee, Improvement of photovoltaic efficiency of dye-sensitized solar cell by introducing highly transparent nanoporous TiO2 buffer layer, J. Nanosci. Nanotech. 2010, 1, 340-348.

98. W.-S. Chung, H. Lee, W. Lee, M. J. Ko, N.-G. Park, B.-K. Ju, and K. Kim, Solution processed polymer tandem cell utilizing organic layer coated nano-crystalline TiO2 as interlayer, Org. Electron. 2010, 11, 521-528.

97. J. H. Koh, J. K. Koh, N.-G. Park, and J. H. Kim, Azide-induced crosslinking of electrolytes and its application in solid-state dye-sensitized solar cells, Sol. Energy Mater. Sol. Cells 2010, 94, 436-441

96. G. Vijayakumar, M. J. Lee, M. Song, S. H. Jin, J.-W. Lee, C. W. Lee, Y. S. Gal, H. J. Shim, Y. Kang, G. W. Lee, K. Kim, N.-G. Park, and S. Kim, New liquid crystal-embedded PVDF-co-HFP-based polymer electrolytes for dye-sensitized solar cell applications, Macromol. Res. 2009, 17, 963-968

95. G-W. Lee, S-Y. Bang, C. Lee, W.-M. Kim, D. Kim, K. Kim, and N.-G. Park, Structural, optical and photoelectrochemical studies on the nanodispersed titania, Curr. Appl. Phys. 2009, 9, 900-906.

94. E. S. Kwak, W. Lee, N.-G. Park, J. Kim, and H. Lee, Compact inverse opal electrode using nonaggregated TiO2 nanoparticles for dyesensitized solar cells, Adv. Funct. Mater. 2009, 19, 1093-1099.

93. K. Kim, and N.-G. Park, Improvement of electron transport by low temperature chemically-assisted sintering in dye-sensitized solar cell, J. Photochem. Photobiol. A: Chem. 2009, 204, 144-147.

92. Y. J. Kim, M. H. Lee, H. J. Kim, G. Lim, Y. S. Choi, N.-G. Park, K. Kim, and W. I. Lee, Formation of highly efficient dye-sensitized solar cells by hierarchical pore generation with nanoporous TiO2 spheres, Adv. Mater. 2009, 21, 1-6.

91. K. Lee, S.W. Park, M.J. Ko, K. Kim, and N.-G. Park, Selective positioning of organic dyes in a mesoporous inorganic oxide films, Nat. Mater. 2009, 8, 665-671.

90. M.-W. Lee, S.-B. Cha, S.-J. Yang, S. W. Park, K. Kim, N.-G. Park, and D.-H. Lee, Synthesis of organic dyes with linkers between 9,9-dimethylfluorenyl terminal and alpha-cyanoacrylic acid anchor, effect of the linkers on UV-vis absorption spectra, and photovoltaic properties in dye-sensitized solar cells, Bull. Korean Chem. Soc. 2009, 30, 2269-2279.

89. M. S. Kang, J. B. Oh, K. D. Seo, H. K. Kim, J. Park, K. Kim, and N.-G. Park, Novel extended pi-conjugated Zn(II)-porphyrin derivatives bearing pendant triphenylamine moiety for dye-sensitized solar cell: synthesis and characterization, J. Porphyr. Phthalocyanines 2009, 13, 798-804.

88. J. H. Park, S. Y. Jung, R. Kim, N.-G. Park, J. Kim, and S.-S. Lee, Nanostructured photoelectrode consisting of TiO2 hollow spheres for non-volatile electrolyte-based dye-sensitized solar cells, J. Power Sources 2009, 194, 574-578.

87. S. W. Park, K.-I. Son, M. J. Ko, K. Kim, and N.-G. Park, Effect of donor moiety in organic sensitizer on spectral response, electrochemical and photovoltaic properties, Synth. Met. 2009, 159, 2571-2577.

86. H.-J. Koo, J. Park, B. Yoo, K. Yoo, K. Kim, and N.-G. Park, Size-dependent scattering efficiency in dye-sensitized solar cell, Inorganica Chim. Acta 2008, 361, 677-683.

85. H.-J. Koo, J. Park, B. Yoo, K. Yoo, K. Kim, W. I. Lee, and N.-G. Park, Nano-embossed hollow spherical TiO2 as bifunctional material for high-efficiency dye-sensitized solar cell, Adv. Mater. 2008, 20, 195-199.

84. Y. Kim, B. Yoo, R. Vittal, Y. Lee, N.-G. Park, and K.-J. Kim, Low-temperature oxygen plasma treatment of TiO2 film for enhanced performance of dye-sensitized solar cells, J. Power Sources 2008, 175, 914-919.

83. H.-J. Koo, C. Kim, K. Kim, and N.-G. Park, Fabrication of heterosensitizer-junction dye-sensitized solar cell, Appl. Phys. Lett. 2008, 92, 142103.

82. N.-G. Park, and K. Kim, Transparent solar cells based on dye-sensitized nanocrystalline semiconductors, Physica Status Solidi (a) 2008, 205, 1895-1904.

81. J. Y. Kim, T.-H. Kim, D. Y. Kim, N.-G. Park, and K.-D. Ahn, Novel thixotropic gel electrolytes based on dicationic bis-imidazolium salts for quasi-solid-state dye-sensitized solar cells, J. Power Sources 2008, 175, 692-697.

80. B. Yoo, K. Kim, S. H. Lee, W. M. Kim, and N.-G. Park, ITO/ATO/TiO2 triple-layered transparent conducting substrates for dye-sensitized solar cells, Sol. Energy Mater. Sol. Cells 2008, 92, 873-877.

79. Y. J. Kim, Y. H. Lee, M. H. Lee, H. J. Kim, J. H. Pan, G. I. Lim, Y. S. Choi, K. Kim, N.-G. Park*, C. Lee, and W. I. Lee, Formation of efficient dye-sensitized solar cells by introducing an interfacial layer of long-range ordered mesoporous TiO2 thin film, Langmuir 2008, 24, 13225-13230.

78. P. K. Singh, K.-W. Kim, N.-G. Park, and H.-W. Rhee, Mesoporous nanocrystalline TiO2 electrode with ionic liquid-based solid polymer electrolyte for dye-sensitized solar cell application, Synth. Met. 2008, 158, 590-593.

77. P. K. Singh, K.-W. Kim, K.-I. Kim, N.-G. Park, and H.-W. Rhee, Nanocrystalline porous TiO2 electrode with ionic liquid impregnated solid polymer electrolyte for dye sensitized solar cells, J. Nanosci. Nanotechnol. 2008, 8(10), 5271-5274.

76. P. K. Singh, K.-I. Kim, N.-G. Park, and H.-W. Rhee, Dye sensitized solar cell using polymer electrolytes based on poly(ethylene oxide) with an ionic liquid, Macromol. Symp. 2007, 249-250, 162-166.

75. S. Hwang, J. H. Lee, C. Park, H. Lee, C. Kim, C. Park, M.-H. Lee, W. Lee, J. Park, K. Kim, N.-G. Park, and C. Kim, A highly efficient organic sensitizer for dye-sensitized solar cells, Chem. Commun. 2007, 46, 4887-4889

74. Y. J. Shin, J. H. Lee, J. H. Park, and N.-G. Park, Enhanced photovoltaic properties of SiO2-treated ZnO nanocrystalline electrode for dye-sensitized solar cell, Chem. Lett. 2007, 36, 1506-1507.

73. J. Park, H. J. Koo, B. Yoo, K. Yoo, K. Kim, W. Choi, and N.-G. Park, On the I-V measurement of dye-sensitized solar cell: Effect of cell geometry on photovoltaic parameters, Sol. Energy Mater. Sol. Cells 2007, 91, 1749-1754.

72. S.-M. Paek, H. Jung, Y.-J. Lee, N.-G. Park, S.-J. Hwang, and J.-H. Choy, Nanostructured TiO2 films for dye-sensitized solar cells, J. Phys. Chem. Solids 2006, 67, 1308-1311.

71. M. K. Kwang, N.-G. Park, M. G. Kang, K. S. Ryu, and S. H. Chang, Effect of TiO2 inclusion in the poly(vinylidene fluoride-co-hexafluoropropylene)-based polymer electrolyte of dye-sensitized solar cell, Bull. Korean Chem. Soc. 2006, 27, 322-324.

70. M. G. Kang, N.-G. Park, K. S. Ryu, S. H. Chang, and K.-J. Kim, A 4.2% efficient flexible dye-sensitized solar cells using stainless steel substrate, Sol. Energy Mater. Sol. Cells 2006, 90, 574-581.

69. S. K. Kim, Y.-S. Kang, J.-H. Lee, Y.-J. Shin, N.-G. Park, K. S. Ryu, and S. H. Chang, Photovoltaic properties of nano-particulate and nanorod array ZnO electrodes for dye-sensitized solar cell, Bull. Korean Chem. Soc. 2006, 27, 295-298.

68. K. M. Kim, N.-G. Park, K. S. Ryu, and S. H. Chang, Characteristics of PVdF-HFP/TiO2 composite membrane electrolytes prepared by phase inversion and conventional casting methods, Electrochim. Acta 2006, 51, 5636-5644.

67. K. M. Kim, N.-G. Park, K. S. Ryu, and S. H. Chang, Physical and electrochemical characterizations of poly(vinylidene fluoride-co-hexafluoropropylene)/SiO2-based polymer electrolytes prepared by the phase-inversion technique, J. Appl. Polym. Sci. 2006, 102, 140-148.

66. Y. Kang, N.-G. Park, and D. Kim, Hybrid solar cells with vertically aligned CdTe nanorods and a conjugated polymer, Appl. Phys. Lett. 2005, 86, 113101-113103.

65. M.-S. Kang, J. H. Kim, Y. J. Kim, J. Won, N.-G. Park, and Y. S. Kang, Dye-sensitized solar cells based on composite polymer electrolytes, Chem. Commun. 2005, 889-891.

64. M. G. Kang, N.-G. Park, K. S. Ryu, S. H. Chang, and K.-J. Kim, Flexible metallic substrates for TiO2 film of dye-sensitized solar cells, Chem. Lett. 2005, 34, 804-805.

63. K. S. Ryu, Y.-G. Lee, K. M. Kim, Y. J. Park, Y.-S. Hong, Xi. Wu, M. G. Kang, N.-G. Park, R. Y. Song, and J. M. Ko, Electrochemical capacitor with chemically polymerized conducting polymer based on activated carbon as hybrid electrodes, Synth. Met. 2005, 153, 89-92.

62. N.-G. Park, K. M. Kim, M. G. Kang, K. S. Ryu, S. H. Chang, and Y.-J. Shin, Chemical sintering of nanoparticles: A methodology of low-temperature fabrication of dye-sensitized TiO2 films, Adv. Mater. 2005, 17, 2349-2353.

61. Y.J. Shin, K.S. Kim, N.-G. Park, K.S. Ryu and S.H. Chang, Enhancement of photovoltaic properties of Ti-modified nanocrystalline ZnO electrode for dye-sensitized solar cell, Bull. Korean Chem. Soc. 2005, 26, 1929-1930.

60. N.-G. Park, M. G. Kang, K. S. Ryu, K. M. Kim, and S. H. Chang, Photovoltaic characteristics of dye-sensitized surface-modified nanocrystalline SnO2 solar cells, J. Photochem. Photobiol. A: Chem. 2004, 161, 105-110

59. J.-G. Doh, J. S. Hong, M. G. Kang, N.-G. Park, R. Vittal, and K.-J. Kim, Enhancement of photocurrent and photovoltage of dye-sensitized solar cells with TiO2 film deposited on indium zinc oxide substrate, Chem. Mater. 2004, 16, 493-497.

58. N.-G. Park, M. G. Kang, K. M. Kim, K. S. Ryu, S. H. Chang, D.-K. Kim, J. van de Lagemaat, K. Bengkstein, and A. J. Frank, Morphological and photoelectrochemical characterization of core-shell nanoparticle films for dye-sensitized solar cells: Zn-O type shell on SnO2 and TiO2 cores”, Langmuir 2004, 20, 4246-4253.

57. S.-G. Kang, K. M. Kim, N.-G. Park, K. S. Ryu, and S.-H. Chang, Factors affecting the electrochemical performance of organic/V2O5 hybrid cathode materials, J. Power Sources 2004, 133, 263-267.

56. M. G. Kang, K. M. Kim, K. S. Ryu, S. H. Chang, N.-G. Park, J. S. Hong, and K.-J. Kim, Dye-sensitized TiO2 solar cells using polymer gel electrolytes based on poly(vinylidenefluoride-co-hexafluoropropylene), J. Electrochem. Soc. 2004, 151, E257-E260.

55. M. G. Kang, K. S. Ryu, S. H. Chang, N.-G. Park, J. S. Hong, and K.-J. Kim, Dependence of TiO2 film thickness on photocurrent-voltage characteristics of dye-sensitized solar cells, Bull. Korean Chem. Soc. 2004, 25, 742-744.

54. J. H. Kim, M.-S. Kang, Y. J. Kim, J. Won, N.-G. Park, and Y. S. Kang, Dye-sensitized nanocrystalline solar cells based on composite polymer electrolytes containing fumed silica nanoparticles, Chem. Commun. 2004, 1662-1663.

53. K. S. Ryu, Y.-G. Lee, Y.-S. Hong, Y. J. Park, X. Wu, K. M. Kim, M. G. Kang, N.-G. Park, and S. H. Chang, Poly(ethylenedioxythiophene) (PEDOT) as polymer electrode in redox supercapacitor, Electrochim. Acta 2004, 50, 843-847.

52. M. G. Kang, K. S. Ryu, S. H. Chang, and N.-G. Park, New ionic liquid for redox electrolyte of dye-sensitized solar cells, ETRI J. 2004, 26(6), 647-652.

51. K. S. Ryu, Y.-G. Lee, K.-S. Han, Y. J. Park, M. G. Kang, N.-G. Park, and S. H. Chang, Electrochemical supercapacitor based on polyaniline doped with lithium salt and active carbon electrodes, Solid State Ion. 2004, 175, 765-768.

50. M. G. Kang, N.-G. Park, and S. H. Chang, Manufacturing method of transparent electric window using dye-sensitized TiO2 solar cells, Sol. Energy Mater. Sol. Cells 2003, 75, 475-479.

49. K. M. Kim, W. S. Jeon, N.-G. Park, K. S. Ryu, and S. H. Chang, Effect of evaporation temperature on the crystalline properties of solution-cast films of poly(vinylidine fluoride)s, Korean J. Chem. Eng. 2003, 20, 934-941.

48. K. M. Kim, W. S. Kim, N.-G. Park, K. S. Ryu, and S. H. Chang, Capacity and cycly performance of practical lithium polymer battery using a commercially available LiNiCoO2, J. Power Sources 2003, 123, 69-74.

47. K. M. Kim, J. M. Ko, N.-G. Park, K. S. Ryu, and S. H. Chang, Characterization of poly(vinylidenefluoride-co-hexafluoropropylene)-based polymer electrolyte filled with rutile TiO2 nanoparticles, Solid State Ion. 2003,161, 121-131.

46. N.-G. Park, J. van de Lagemaat, and A. J. Frank, Effect of morphology on electron transport in dye-sensitized nanostructured TiO2 films, J. Photoscience 2003, 10, 199-202.

45. K. S. Ryu, N.-G. Park, K. M. Kim, Y. G. Lee, Y. J. Park, S. J. Lee, C. K. Jeong, J. Joo and S. H. Chang, The physicochemical properties of polyindole/thiol composites, Synth. Met. 2003, 135-136, 397-398.

44. N.-G. Park, K M Kim, K S Ryu, Y J Park, M G Kang, D-K Kim, S-G Kang, and S-H Chang, Synthesis and electrochemical properties of V2O5 intercalated with binary polymers, J. Power Sources 2002, 103, 273-279.

43. K. S. Ryu, K. M. Kim, Y. J. Park, N.-G. Park, and S. H. Chang, Symmetric redox supercapacitor with conducting polyaniline electrodes, J. Power Sources 2002, 103, 305-309.

42. K. Zhu, E. A. Schiff, N.-G. Park, J. van de Lagemaat, and A. J. Frank, Determining the locus for photocarrier recombination in dye-sensitized solar cells, Appl. Phys. Lett. 2002, 80, 685-687.

41. M. G. Kang, N.-G. Park, S. H. Chang, S. H. Choi, and K.-J. Kim, Enhanced photocurrent of Ru(II)-dye sensitized solar cells by incorporation of titanium silicalite-2 in TiO2 film, Bull. Korean Chem. Soc. 2002, 23, 140-142.

40. Y. J. Park, K. S. Ryu, N.-G. Park, Y.-S. Hong, and S. H. Chang, Rf-sputtered vanadium oxide films: effect of film thickness on structural and electrochemical properties, J. Electrochem. Soc. 2002, 149, A597-602.

39. K. M. Kim, N.-G. Park, K. S. Ryu, and S. H. Chang, Characterization of poly(vinylidenefluoride-co-hexafluoropropylene)-based polymer electrolyte filled with TiO2 nanoparticles, Polymer 2002, 43, 3951-3957.

38. J.-H. Choy, N.-G. Park, J. B. Yoon, and H. Jung, A new intercalation complex, C60(C2H8N2)6-FeOCl, Bull. Korean Chem. Soc. 2002, 23, 1191-1192.

37. K.S. Ryu, K.M. Kim, Y.J. Park, N.-G. Park, M.G. Kang, and S.H. Chang, Redox supercapacitor using polyaniline doped with Li salt as electrode, Solid State Ion. 2002, 152-153, 861-866.

36. Y.J. Park, K.S. Ryu, K. M. Kim, N.-G. Park, M. G. Kang, and S.H. Chang, Electrochemical properties of vanadium oxide thin film deposited by RF sputtering, Solid State Ion. 2002, 154-155, 229-235.

35. S.-H. Lee, H M Cheong, N.-G. Park, C.E. Tracy, A. Mascarenhas, D.K. Benson, and S.K. Deb, Raman spectroscopic studies of Ni-W oxide films, Solid State Ion. 2001, 140, 135-139.

34. K.S. Ryu, K.M. Kim, N.-G. Park, Y.J. Park,J.H. Jeong, J. Joo, and S.H. Chang, A new approach to preparing highly conducting polyaniline films, Synth. Met. 2001, 119, 355-356.

33. N.-G. Park, S. H. Chang, and K. M. Kim, Sonochemical synthesis of the high energy density cathode material VOPO4 2H2O, Electrochem. Commun. 2001, 3, 553-556.

32. Y. J. Park, N.-G. Park, K. S. Ryu, S. H. Chang, S.-C. Park, S.-M. Yoon, and D.-K. Kim, RF-sputtered vanadium oxide thin films: effect of oxygen partial pressure on structural and electrochemical properties, Bull. Korean Chem. Soc. 2001, 22, 1015-1018.

31. J. van de Lagemaat, N.-G. Park, and A. J. Frank, Influence of electrical potential distribution, charge transport, and recombination on the photopotential and photocurrent conversion efficiency of the dye-sensitized nanocrystalline TiO2 solar cells: A study by electrical impedance and optical modulation techniques, J. Phys. Chem. B 2000, 104, 2044-2052.

30. N. Kopidakis, E. A. Schiff, N.-G. Park, J. van de Lagemaat, and A.J. Frank, Ambipolar diffusion of photocarriers in electrolyte-filled nanoporous TiO2, J. Phys. Chem. B 2000, 104, 3930-3936.

29. J.-H. Choy, Y.-I. Kim, B.-W Kim, N.-G. Park, G. Campet, and J.-C. Grenier, New solution route to electrochromic polyacrylic acid/WO3 hybrid film, Chem. Mater. 2000, 12, 2950-2956.

28. N.-G. Park, J. van de Lagemaat, and A. J. Frank, Comparison of dye-sensitized rutile- and anatase-based TiO2 solar cells, J. Phys. Chem. B 2000, 104, 8989-8994.

27. N.-G. Park, S. H. Chang, J. van de Lagemaat, K.J. Kim, and A. J. Frank, Effect of cations on the open-circuit photovoltage and the charge-injection efficiency of dye-sensitized nanocrystalline rutile TiO2 films, Bull. Korean Chem. Soc. 2000, 21, 985-988.

26. G. Schlichthorl, N.-G. Park, and A. J. Frank, Evaluation of the charge-collection efficiency of dye-sensitized nanocrystalline TiO2 solar cell, J. Phys Chem. B 1999, 103, 782-791.

25. N.-G. Park*, G. Schlichtorl, J. van de Lagemaat, H. M. Cheong, A. Mascarenhas, and A. J. Frank, Dye-sensitized TiO2 solar cells: structural and photoelectrochemical characterization of nanocrystalline electrodes formed from the hydrolysis of TiCl4, J. Phys. Chem. B 1999, 103, 3308-3314.

24. M.A. Ibrahim, B.-G. Lee, N.-G. Park, J.R. Pugh, D.D. Eberl, and A.J. Frank, Synthesis of new oligothiophene derivatives and their intercalation compounds: orientation effects, Synth. Met. 1999, 105, 35-42.

23. G. Schlichthorl, N.-G. Park, and A.J. Frank, Estimation of the charge-collection efficiency of dye-sensitized nanocrystalline TiO2 solar cells, J. Phys. Chem. 1999, 212, 45-50.

22. S.K. Deb, R. Ellingson, S. Ferrere, A.J. Frank, B.A. Gregg, A.J. Nozik, and N.-G. Park, G. Schlichthrol, A. Zaban, Photochemical solar cell based on dye-sensitization of nanocrystalline TiO2, AIP Conf. Proc. 1999, 462, 473-482.

21. S.-J. Hwang, N.-G. Park, D.-H. Kim, and J.-H. Choy, Charge transfer-Tc relation in superconducting intercalates IBi2Sr2CaCu2Oy, J. Solid State Chem. 1998, 138, 66-73.

20. N.-G. Park, B.W Kim, A. Poquet, G. Campet, J. Portier, J.-H. Choy, and Y.-I. l Kim, A new and simple method for manufacturing electrochromic tungsten oxide films, Active Passive Elec. Comp. 1998, 20, 125-133.

19. N.-G. Park, A. Poquet, G. Campet, J. Portier, J.-H. Choy, Y.-I. Kim, D. Camino, and J. Salardenne, Development of electrochromic devices working with hydrophobic lithium electrolyte, Active Passive Elec. Comp. 1998, 20, 201-213.

18. J.-H. Choy, S.-J. Hwang, and N.-G. Park, Interacrystalline structure of molecular mercury halide intercalated in high-tc superconducting lattice of Bi2Sr2CaCu2Oy, J. Am. Chem. Soc. 1997, 119, 1624-1633

17. J.-H. Choy, N.-G. Park, J.-B. Yoon, K.-S. Han, and S.-H. Chang, The effect of lithium intercalation on the crystal structure and magnetic property of layered FeWO4Cl, Jpn. J. Appl. Phys. 1997, 36, 2656-2660

16. J.-H. Choy, J.-B. Yoon, N.-G. Park, Y.-I Kim and K.-S. Han, X-ray absorption spectroscopic studies on layered FeWO4Cl and its lithium intercalates, Jpn. J. Appl. Phys. 1997, 36, 5605-5609.

15. Y.-I. Kim, B.-W. Kim, J.-H. Choy, G. Campet, N.-G. Park, J. Portier, and B. Morel, RF sputtered lithium nickel oxide films and their electrochromism, J. Korean Chem. Soc. 1997, 41, 594-599.

14. J.-H. Choy, N.-G. Park, S.-J. Hwang, and Z.G. Khim, Evolution of superconducting transition temperature (Tc) upon HgBr2 intercalation into Bi2Sr1.5-xLaxCa1.5Cu2Oy, J. Phys. Chem. 1996, 100, 3783.

13. N.-G. Park, S.-W. Cho, S.-J. Kim and J.-H. Choy, X-ray absorption near edge structure (XANES) of the iodine intercalated C60: evidence of I2d+ in I2C60, Chem. Mater. 1996, 8, 324-326.

12. M.-K. Bae, M.-S. Kim, S.-I. Lee, N.-G. Park, S.-J. Hwang, D.-H. Kim, and J.-H. Choy, Effect of HgI2 intercalation on Bi2Sr2CaCu2Oy: interlayer coupling effect, Phys. Rev. B 1996, 53, 12416-12421.

11. J.-H. Choy, N.-G. Park, S.-J. Hwang, S.-H. Hwang, and D.-H. Kim, X-ray absorption spectroscopic study of new high-Tc superconducting intercalation compounds of (HgX2)0.5Bi2Sr2CaCu2Oy (X=Br, I), Proc. SPIE 1996, 2696, 636-641.

10. J.-H. Choy, Y.-I. Kim, N.-G. Park, and S.-H. Hwang, Nano-engineering via intercalation: layer-by-layer interstratification of high-Tc superconducting and superionic materials, AgxIwBi2Sr2Can-1CunO2n+4 (n=1, 2, 3), Proc. SPIE 1996, 2697, 403-412.

9. J.-H. Choy, N.-G. Park, Y.-I. Kim, S.-H. Hwang, J.-S. Lee, and H.-I. Yoo, Molecular layer-by-layer engineering of superconducting and superionic materials in the (AgI)Bi2Sr2CaCu2Oy system, J. Phys. Chem. 1995, 99, 7845-7848.

8. J.-H. Choy, S.-T. Hong, N.-G. Park, S.-H. Byeon, and G. Demazeau, Pressure dependence of the oxidation state of manganese and magnetic property of CaLaMgMnO6-x, Bull. Korean Chem. Soc. 1995, 16, 105-110.

7. J.-H. Choy, N.-G. Park, S.-J. Hwang, and Y.-I Kim, A new high-tc superconducting intercalation compound, Synth. Met. 1995, 71, 1551-1553.

6. J.-H. Choy, N.-G. Park, and D.-Y. Noh, A new 2-dimensional magnetic model for the layered compounds of FeMO4Cl (M=Mo and W) with strong interlayer coupling, Synth. Met. 1995, 71, 2055-2056.

5. J.-H. Choy, Y.-S. Han, N.-G. Park, H. Kim, and S.-W. Kim, N-alkylammonium intercalated 2-d titanates and their thermotropic phase transition, Synth. Met. 1995, 71, 2053-2054.

4. J.-H. Choy, N.-G. Park, S.-H. Chang, and H.-H. Park, Electronic structure of iron and molybdenum in Li2FeMoO4Cl and its crystal symmetry, J. Korean Chem. Soc. 1995, 39, 446-452.

3. J.-H. Choy, N.-G. Park, Y.-I. Kim, and Chy-Hyung Kim, New mixed nanocomposites, (AgI)xBi2Sr2CaCu2Oy, Eur. J. Solid State Inorg. Chem. 1995, 32, 701-709.

2. J.-H. Choy, N.-G. Park, S.-J. Hwang, D.-H. Kim, and N.H. Hur, New superconducting intercalation compounds: (HgX2)0.5Bi2Sr2CaCu2Oy (X=Br and I), J. Am. Chem. Soc. 1994, 116, 11564-11565.

1. J.-H. Choy, D.-K. Kim, N.-G. Park, D.-H. Kim, S.-J. Hwang, S.-H. Hwang, and N.H. Hur, XANES and EXAFS studies on a new superconducting intercalation compound, AgIBi2Sr2CaCu2Oy, Physica C 1994, 235-240, 1023-1024.