Title

Panchromatic Cross-Conjugated π-Bridge NIR Dyes for DSCs

Document Type

Article

Publication Date

1-8-2018

Department

Polymers and High Performance Materials

Abstract

Four organic sensitizers incorporating a cross-conjugated cyclopenta[2,1-b:3,4-b′]dithiophene (CPDT) π-bridge have been synthesized. As a result of molecular engineering, broad high energy bands and red shifted absorption maxima and onset is observed relative to a benchmark analogue (C218) using a non-cross-conjugated CPDT π-bridge. The use of a cross-conjugated bridge allows a new strategy for tuning dye energetics and introduction of increased absorption uniformity by adding additional high-energy absorption bands. These dyes show solar-to-electric conversion up to 800 nm with one derivative exceeding the performance of C218 under identical conditions.

Publication Title

Physical Chemistry Chemical Physics

Volume

20

Issue

4

First Page

2438

Last Page

2443

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