Lee, Kyungtae Park, Se Woong Ko, Min Jae Kim, Kyungkon Park, Nam-Gyu 2024-01-20T21:02:13Z 2024-01-20T21:02:13Z 2021-09-03 2009-08 1476-1122 https://pubs.kist.re.kr/handle/201004/132262 Although sequential adsorption of dyes in a single TiO2 electrode is ideal to extend the range of light absorption in dye-sensitized solar cells, high-temperature processing has so far limited its application. We report a method for selective positioning of organic dye molecules with different absorption ranges in a mesoporous TiO2 film by mimicking the concept of the stationary phase and the mobile phase in column chromatography, where polystyrene-filled mesoporous TiO2 film is explored for use as a stationary phase and a Bronsted-base-containing polymer solution is developed for use as a mobile phase for selective desorption of the adsorbed dye. By controlling the desorption and adsorption depth, yellow, red and green dyes were vertically aligned within a TiO2 film, which is confirmed by an electron probe micro-analyser. The external quantum efficiency (EQE) spectrum from a solar cell with three selectively positioned dyes reveals the EQE characteristics of each single-dye cell. English NATURE PUBLISHING GROUP SENSITIZED SOLAR-CELLS HYBRID MULTILAYER IMPEDANCE SPECTROSCOPY ELECTRICAL-IMPEDANCE NANOPOROUS MATERIAL EFFICIENCY TRANSPORT RECOMBINATION ELECTROLYTE FABRICATION Selective positioning of organic dyes in a mesoporous inorganic oxide film Article 10.1038/NMAT2475 1 NATURE MATERIALS, v.8, no.8, pp.665 - 671 NATURE MATERIALS 8 8 665 671 scie scopus 000268288000020 2-s2.0-69249210915 Chemistry, Physical Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Materials Science Physics Article SENSITIZED SOLAR-CELLS HYBRID MULTILAYER IMPEDANCE SPECTROSCOPY ELECTRICAL-IMPEDANCE NANOPOROUS MATERIAL EFFICIENCY TRANSPORT RECOMBINATION ELECTROLYTE FABRICATION