Kim, Se Hun Choi, Jun Sakong, Chun Namgoong, Jin Woong Lee, Woosung Kim, Dong Hoe Kim, Boeun Ko, Min Jae Kim, Jae Pil 2024-01-20T08:00:40Z 2024-01-20T08:00:40Z 2021-09-04 2015-02 0143-7208 https://pubs.kist.re.kr/handle/201004/125830 Four new organic photosensitizers (SH-11 similar to 14) that introduced methoxy groups as an additional donor were synthesized, and used in dye-sensitized solar cells. The dyes were designed in order to investigate the effects on the dye photophysical properties and the cell photovoltaic performance, by the number, position, and shape of methoxy groups introduced at the para-/ortho- and para-/meta- and para-(open or closed ring shape) positions on the triphenylamine donor. The introduction of methoxy groups led to bathochromic shift of the absorption spectrum, and enhancement of the molar extinction coefficient of the dyes. Their introduction decreased the amount of dye adsorbed on TiO2 surface, due to the increased steric hindrance. As their number increased, an open-circuit voltage value decreased. All things considered, the dye (SH-14) with closed ring shape shows the best conversion efficiency of 6.01% under AM 1.5G conditions (N719 dye's 7.59% under the same conditions). (C) 2014 Elsevier Ltd. All rights reserved. English ELSEVIER SCI LTD TRIARYLAMINE BASED DYES ORGANIC-DYES PHENOXAZINE DYES COUMARIN DYE IMPROVEMENT LINKERS BEARING The effect of the number, position, and shape of methoxy groups in triphenylamine donors on the performance of dye-sensitized solar cells Article 10.1016/j.dyepig.2014.09.014 1 DYES AND PIGMENTS, v.113, pp.390 - 401 DYES AND PIGMENTS 113 390 401 scie scopus 000346543200050 2-s2.0-84907294940 Chemistry, Applied Engineering, Chemical Materials Science, Textiles Chemistry Engineering Materials Science Article TRIARYLAMINE BASED DYES ORGANIC-DYES PHENOXAZINE DYES COUMARIN DYE IMPROVEMENT LINKERS BEARING Dye-sensitized solar cell Triphenylamine dye Electron donor Methoxy group Bathochromic shift Dihedral angle