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Exploring Structure-Property Relationships in a Bio-Inspired Family of Bipodal and Electronically-Coupled Bistriphenylamine Dyes for Dye-Sensitized Solar Cell Applications.


ABSTRACT: A bio-inspired family of organic dyes with bichromic-bipodal architectures were synthesized and tested in dye-sensitized solar cells (DSSC). These dyes are comprised of a D-π-D-A motif with two triphenylamine (TPA) units acting as donors (D) and two cyanoacetic acid acceptors (A) capable of binding to a titania semiconductor. The role of the thiophene π-spacer bridging the two TPA units was examined and the distal TPA (relative to TiO2) was modified with various substituents (-H, -OMe, -SMe, -OHex, -3-thienyl) and contrasted against benchmark L1. It was found that the two TPA donor units could be tuned independently, where π-spacers can tune the proximal TPA and R-substituents can tune the distal TPA. The highest performing DSSCs were those with -SMe, 3-thienyl, and -H substituents, and those with one spacer or no spacers. The donating abilities of R-substituents was important, but their interactions with the electrolyte was more significant in producing high performing DSSCs. The introduction of one π-spacer provided favourable electronic communication within the dye, but more than one was not advantageous.

SUBMITTER: Al-Faouri T 

PROVIDER: S-EPMC7248778 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature

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Exploring Structure-Property Relationships in a Bio-Inspired Family of Bipodal and Electronically-Coupled <i>Bis</i>triphenylamine Dyes for Dye-Sensitized Solar Cell Applications.

Al-Faouri Tamara T   Buguis Francis L FL   Azizi Soldouz Saba S   Sarycheva Olga V OV   Hussein Burhan A BA   Mahmood Reeda R   Koivisto Bryan D BD  

Molecules (Basel, Switzerland) 20200511 9


A bio-inspired family of organic dyes with bichromic-bipodal architectures were synthesized and tested in dye-sensitized solar cells (DSSC). These dyes are comprised of a D-π-D-A motif with two triphenylamine (TPA) units acting as donors (D) and two cyanoacetic acid acceptors (A) capable of binding to a titania semiconductor. The role of the thiophene π-spacer bridging the two TPA units was examined and the distal TPA (relative to TiO<sub>2</sub>) was modified with various substituents (-H, -OMe  ...[more]

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