Document Type

Journal Article

Department/Unit

Department of Physics; Department of Chemistry

Language

English

Abstract

A porphyrin-based donor material P1 is used to fabricate bulk-heterojunction solar cells harvesting room light. P1 consists of a porphyrin ring linked by two ethylrhodanine end caps via phenylene ethynylene bridges. Organic photovoltaic (OPV) cells using P1 as the donor exhibit significantly improved performances under indoor illumination compared to 1 sun conditions. For P1:PC71BM cells, an optimized-PCE of 19.2% was achieved under a 300 lux illumination of a 3000 K LED tube. Besides high PCEs, the porphyrin-based devices also exhibit enhanced OPV performances in thick film regions (∼200 nm) compared to a control BHJ cell using PCDTBT:PC71BM. The thick-film P1-based device shows an overall PCE of 18.2%. The origins of the thickness independent OPV performances were examined, and they can be attributed to the low electronic disorders of these materials when compared to their polymer counterparts.

Publication Date

9-2018

Source Publication Title

Journal of Materials Chemistry C

Volume

6

Issue

34

Start Page

9111

End Page

9118

Publisher

Royal Society of Chemistry

DOI

10.1039/C8TC02838A

Link to Publisher's Edition

https://doi.org/10.1039/C8TC02838A

ISSN (print)

20507526

Available for download on Tuesday, October 01, 2019

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