Syntheses of triphenylamine-based organic dyes and effects of their acceptor groups on photovoltaic performances of dye sensitized solar cells
By Lee, Jin-Kook; Lee, Seung-Min; Lee, Su-Bin; Kim, Ki-Hyun; Cho, Sang-Eun; il Jang, Sung; Park, Sung-Hae; Hwang, Won-Pill; Seo, Min-Hye & Kim, Mi-Ra
Published in Current Applied Physics
NULL
2010
Abstract
We synthesized two organic dyes, (3-(5-(4-(bis(4-bromophenyl)amino)phenyl)thiophen-2-yl)-2-cyanoacrylic acid (TPA-T1) and 3,3′-(5,5′-(4,4′-(4-bromophenylazanediyl)bis(4,1-phenylene))bis(thiophene-5,2-diyl))bis(2-cyanoacrylic acid) (TPA-T2)), which contain the triphenylamine moiety as an electron donor and cyanoacrylic acid moiety as an electron acceptor, connected by thiophene units. Nanocrystalline TiO2-based dye sensitized solar cells (DSSCs) were fabricated using these dyes to confirm the effects of the number of electron acceptors (single or double) on their photovoltaic performance. The DSSC devices based on the TPA-T2 dye showed higher overall efficiencies (η = 2.68–4.11%) than those based on TPA-T1 (η = 2.54–3.46%) due to its the superior optical properties.
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