Systematic Investigation of Porphyrin‐Thiophene Conjugates for Ternary Bulk Heterojunction Solar Cells. Issue 20 (25th July 2016)

• Record Type: Journal Article
• Authors: Keawsongsaeng, Wittawat; Gasiorowski, Jacek; Denk, Patrick; Oppelt, Kerstin; Apaydin, Dogukan H.; Rojanathanes, Rojrit; Hingerl, Kurt; Scharber, Markus; Sariciftci, Niyazi Serdar; Thamyongkit, Patchanita
• Is Part Of: Advanced energy materials. Volume 6:Issue 20(2016)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2016-07-25
• Subjects: benzpoporphyrin -- bulk heterojunction solar cells -- organic solar cells -- porphyrin -- thiophene; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201600957
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract : A family of porphyrins and benzoporphyrins bearing phenyl, thiophenyl, or bithiophenyl groups at their meso ‐positions are synthesized and systematically investigated for their potential use in bulk heterojunction solar cells (BHJ‐SCs). Comparative studies of these compounds show that the introduction of the thiophenyl and bithiophenyl groups, and the extension of the porphyrin π‐conjugated system significantly affect both photophysical and electrochemical properties. Binary conventional and ternary converted BHJ‐SCs based on these compounds are fabricated and studied. Results show that remarkable enhancement of the device efficiency is achieved by using the thiophene‐containing benzoporphyrin derivatives as additives for a poly(3‐hexylthiophene) (P3HT):phenyl‐C61‐butyric acid methyl ester blend in the inverted BHJ‐SCs. The optimum BHJ‐SC exhibits a maximum energy conversion efficiency of 4.3%, corresponding to 19% enhancement of the conversion efficiency as compared with the benchmark BHJ‐SCs. Abstract : Systematic structural modification of a series of porphyins and benzoporphyrins bearing phenyl, thiophenyl, or bithiophenyl meso ‐substituents enables understanding of structure–property relationship and fine‐tuning of photophysical and electrochemical properties of the compounds. Device conversion efficiency can be improved by 19% when thiophene‐substituted benzoporphyrin is used as an additive for ternary converted bulk heterojunction solar cells.