Isomeric tetrazole-based organic dyes for dye-sensitized solar cells: Structure-property relationships

2021 ◽  
pp. 131749
Author(s):  
Luciano da Silva ◽  
Mario Sánchez ◽  
Marisol Ibarra-Rodrigues ◽  
Harold S. Freeman
Keyword(s):  
Solar Cells ◽  
Organic Dyes ◽  
Dye Sensitized Solar Cells ◽  
Structure Property ◽  
Dye Sensitized ◽  
Structure Property Relationships ◽  
Sensitized Solar Cells

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

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2260
Author(s):  
Tamara Al-Faouri ◽  
Francis L. Buguis ◽  
Saba Azizi Soldouz ◽  
Olga V. Sarycheva ◽  
Burhan A. Hussein ◽  
...  
Keyword(s):  
Electronic Communication ◽  
Organic Dyes ◽  
Dye Sensitized Solar Cells ◽  
Structure Property ◽  
Cyanoacetic Acid ◽  
High Performing ◽  
Dye Sensitized ◽  
Structure Property Relationships ◽  
Sensitized Solar Cells

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.

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