Issue 10, 2020

Achieving organic solar cells with efficiency over 14% based on a non-fullerene acceptor incorporating a cyclopentathiophene unit fused backbone

Abstract

The cyclopentadithiophene (CPT) unit is a classic building block for constructing organic semiconductor materials with excellent performances. In this work, we designed and synthesized a new acceptor BCPT-4F, incorporating a CPT fused central backbone. BCPT-4F shows a redshift absorption in the near-infrared region compared with CPT based acceptors with an unfused backbone. Importantly, the photovoltaic device based on PBDB-T:BCPT-4F achieved a promising power conversion efficiency (PCE) of 12.43% with a high short circuit current density (Jsc) of 22.96 mA cm−2. Furthermore, based on the above binary device, a ternary device with F-Br as the third component achieved a high PCE of 14.23%, which is presently the highest efficiency for devices with CPT based photovoltaic materials.

Graphical abstract: Achieving organic solar cells with efficiency over 14% based on a non-fullerene acceptor incorporating a cyclopentathiophene unit fused backbone

Supplementary files

Article information

Article type
Paper
Submitted
16 Jan 2020
Accepted
12 Feb 2020
First published
13 Feb 2020

J. Mater. Chem. A, 2020,8, 5194-5199

Achieving organic solar cells with efficiency over 14% based on a non-fullerene acceptor incorporating a cyclopentathiophene unit fused backbone

Y. Cai, L. Meng, H. Gao, Z. Guo, N. Zheng, Z. Xie, H. Zhang, C. Li, X. Wan and Y. Chen, J. Mater. Chem. A, 2020, 8, 5194 DOI: 10.1039/D0TA00677G

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