Novel organic dyes for dye-sensitized solar cells based on 1-(2-ethylhexyl)pyrrole as a

π-bridge

Yi Tian^b,1, Xintong Ying^a,1, Chunli Zhou^a, Shupeng Zhang^a, Siyu Zhao^a, Ke Li^a, Mengchen Xu^a,

Hui-Juan Yu^c,d, GuangShao ^c,d,∗∗, Jing-Kun Fang^a,∗

Abstract:

  Three novel organic dyes coded as FWD9, FWD10 and FHD7 with different donors were reported in this work. Their molecular structures were fully characterized and photophysical/electrochemical properties as well as performances as sensitizers for DSSCs were scrutinized in detail. By the adoption of 1-(2-ethylhexyl)pyrrole moiety,dye aggregation was efficiently suppressed and better power conversion efficiencies were observed for all the three dyes compared with the addition of coadsorbent chenodeoxycholic acid. FWD9 with bis(4-styryl)phenyl amino donor exhibited the best power conversion efficiency to be 5.80% among the three dyes, while the Jsc to be 13.95 mA cm−2, Voc to be 0.66 V and FF to be 0.63, and it was unnecessary to add adsorbent to suppress the

dye aggregation.

https://www.sciencedirect.com/science/article/abs/pii/S0143720820313528?via%3Dihub