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Issue 34, 2016
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A wide-bandgap conjugated polymer for highly efficient inverted single and tandem polymer solar cells

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Abstract

We synthesized a wide-bandgap conjugated polymer (named PTZ1) based on thienyl-substituted benzodithiophene as the donor unit and thiazolothiazole as the acceptor unit for photovoltaic applications. The polymer exhibits a desirable broad bandgap of 1.97 eV with the maximum absorption edge of 630 nm, a deep highest occupied molecular orbital (HOMO) energy level of −5.31 eV and a relatively high hole mobility of 3.86 × 10−3 cm2 V−1 s−1. Consequently, single junction PSCs based on PTZ1 exhibit outstanding performance with a PCE of 7.7% and a high Voc of 0.94 V, which are among the highest values for PSCs based on conjugated polymers with a broad bandgap near to 2.0 eV. The excellent performance is attributed to the high polymer crystallinity, favorable backbone orientation and continuous interpenetrating network in blend films. The tandem PSCs based on PTZ1 as the donor material in the front cell exhibited a high PCE of 10.3% with a Voc of 1.65 V.

Graphical abstract: A wide-bandgap conjugated polymer for highly efficient inverted single and tandem polymer solar cells

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Supplementary files

Article information


Submitted
13 Jun 2016
Accepted
28 Jul 2016
First published
28 Jul 2016

J. Mater. Chem. A, 2016,4, 13251-13258
Article type
Paper

A wide-bandgap conjugated polymer for highly efficient inverted single and tandem polymer solar cells

B. Guo, X. Guo, W. Li, X. Meng, W. Ma, M. Zhang and Y. Li, J. Mater. Chem. A, 2016, 4, 13251
DOI: 10.1039/C6TA04950H

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