Issue 26, 2020

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

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

Supplementary files

Article information

Article type
Paper
Submitted
24 ⵎⴰⵕ 2020
Accepted
01 ⵢⵓⵏ 2020
First published
01 ⵢⵓⵏ 2020

J. Mater. Chem. C, 2020,8, 8770-8776

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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