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Issue 26, 2020
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Near-infrared absorbing pyrrolopyrrole aza-BODIPY-based donor–acceptor polymers with reasonable photoresponse

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Abstract

Designing near-infrared (NIR) absorbing donor–acceptor (D–A) polymers with photoresponse beyond 900 nm has remained a challenge in the area of organic photovoltaics (OPV) owing to the limited kinds of strong electron acceptors. Here we present the use of pyrrolopyrrole aza-BODIPY (PPAB) as a new acceptor group in D–A polymers in place of a conventional diketopyrrolopyrrole acceptor to achieve power conversion efficiencies up to 2.27% despite the ultra-small bandgap of 1.08 eV. The small photon energy loss of the PPAB-based D–A polymer and moderately high short-circuit current of 8.52 mA cm−2 arising from the panchromatic visible/NIR absorption guarantee PPAB as a potential building block of D–A polymers for NIR photovoltaics.

Graphical abstract: Near-infrared absorbing pyrrolopyrrole aza-BODIPY-based donor–acceptor polymers with reasonable photoresponse

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Supplementary files

Article information


Submitted
24 Mar 2020
Accepted
01 Jun 2020
First published
01 Jun 2020

J. Mater. Chem. C, 2020,8, 8770-8776
Article type
Paper

Near-infrared absorbing pyrrolopyrrole aza-BODIPY-based donor–acceptor polymers with reasonable photoresponse

R. Feng, N. Sato, M. Nomura, A. Saeki, H. Nakanotani, C. Adachi, T. Yasuda, H. Furuta and S. Shimizu, J. Mater. Chem. C, 2020, 8, 8770
DOI: 10.1039/D0TC01487G

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