Kim, Sun Jae Heo, Dong Uk Yoo, Beom Jin Kim, Boeun Ko, Min Jae Cho, Min Ju Choi, Dong Hoon 2024-01-20T13:32:09Z 2024-01-20T13:32:09Z 2021-09-04 2012-12 0379-6779 https://pubs.kist.re.kr/handle/201004/128625 Novel two-dimensional X-shaped donor-pi-acceptor (D-pi-A)-type dyes were designed and successfully synthesized for use in a dye-sensitized solar cell (DSSC). Two triphenylamine units in these dyes act as electron donor units, while two cyanoacrylic acid groups act as electron acceptor units and anchoring groups to the TiO2 photoanode. The photovoltaic properties of the newly synthesized dye-containing DSSCs were investigated to identify the effects of conjugation length between the electron donors and acceptors, and the molecular energy levels of the dyes. Among the three dyes we synthesized, (2E,2'E)-3,3'-(5',5 ''-(4,5-bis(4-(bis(4-tert-butylphenyl)amino)styryl)-1,2-phenylene)bis(2,2'-bithiophene-5',5-diyl))bis(2-cyanoacrylic acid) (11) showed the highest power conversion efficiency of 3.14% (eta(max) = 4.06% with TiCl4 treatment) under AM 1.5G illumination (100 mW cm(-2)) in a photoactive area of 0.418 cm(2) with short circuit current density of 7.27 mA cm(-2), open circuit photovoltage of 612 mV, and a fill factor of 70.6%. (C) 2012 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA ELECTROLYTE FILM IMPEDANCE Two-dimensional X-shaped organic dyes bearing two anchoring groups to TiO2 photoanode for efficient dye-sensitized solar cells Article 10.1016/j.synthmet.2012.10.003 1 SYNTHETIC METALS, v.162, no.23, pp.2095 - 2101 SYNTHETIC METALS 162 23 2095 2101 scie scopus 000313401300017 2-s2.0-84868576249 Materials Science, Multidisciplinary Physics, Condensed Matter Polymer Science Materials Science Physics Polymer Science Article ELECTROLYTE FILM IMPEDANCE X-shaped molecule Synthesis Photosensitizer Solar cell Power conversion efficiency