Evaluating the photoelectric performance of D-π-A dyes with different π-conjugated bridges for DSSCs

In the synthesis experiment (Dyes Pigm., 2020, 174, 108026), it was found that the 10 and 11 dyes have the excellent red-shift value in the absorption spectrum, so we replaced the conjugated bridges of 10 and 11 by introducing different functional groups, four novel dyes (A, B, C, D) are designed as the photoactive layers of dye-sensitized solar cells (DSSCs). Compare with other dyes, it is worth noting that the designed dye B displays the narrowest energy gap, the most obvious red shift of absorption peak (similar to 545 nm), the best charge separation ability and the most outstanding electron transport performance.

Automated summary

In the synthesis experiment, it was found that dyes 10 and 11 have excellent red-shift values in the absorption spectrum. Based on this, four novel dyes (A, B, C, D) were designed as the photoactive layers of DSSCs. Among them, dye B exhibits the narrowest energy gap and the most significant red shift in absorption peak.