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Achieving Organic Solar Cells with efficiency over 14% based on a non-Fullerene Acceptor incorporating the 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 near-infrared region compared with CPT based acceptors with unfused backbone. Importantly, the photovoltaic device based on PBDB-T:BCPT-4F gave a promising power conversion efficiency (PCE) of 12.43% with a high short circuit current density of 22.96 mA cm−2. Furtherly,based on the above binary device, the 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.

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Supplementary files

Article information


Submitted
16 Jan 2020
Accepted
12 Feb 2020
First published
13 Feb 2020

J. Mater. Chem. A, 2020, Accepted Manuscript
Article type
Paper

Achieving Organic Solar Cells with efficiency over 14% based on a non-Fullerene Acceptor incorporating the 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, Accepted Manuscript , DOI: 10.1039/D0TA00677G

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