Issue 36, 2020

Quantifying Voc loss induced by alkyl pendants of acceptors in organic solar cells

Abstract

In the organic photovoltaic community, extensive efforts have been made in proposing resolutions for depressing Voc loss related to the molecular structures and optoelectronic properties of materials in bulk heterojunctions. Focusing on understanding the origin of aggregation-induced Voc loss and exploring the generality for material design, we used non-fullerene acceptors with various alkyl pendants in bulk heterojunctions and characterized the optoelectronic properties. As the alkyl pendants became longer from IT-4Cl-C6 to IT-4Cl-C10, the photovoltaic devices exhibited depressed Voc losses and improved power conversion efficiencies. This work expounds the structure activity relationship of alkyl pendant-dependent photovoltaic properties, suggesting a convincing guideline for non-fullerene acceptor design.

Graphical abstract: Quantifying Voc loss induced by alkyl pendants of acceptors in organic solar cells

Supplementary files

Article information

Article type
Paper
Submitted
21 4 2020
Accepted
05 8 2020
First published
05 8 2020

J. Mater. Chem. C, 2020,8, 12568-12577

Quantifying Voc loss induced by alkyl pendants of acceptors in organic solar cells

X. Liu, Z. Zheng, Y. Xu, J. Wang, Y. Wang, S. Zhang and J. Hou, J. Mater. Chem. C, 2020, 8, 12568 DOI: 10.1039/D0TC01941K

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