Non-fused molecular photovoltaic acceptor with a planar core structure enabled by bulky and embracing-type side chains. Issue 8 (11th February 2022)

• Record Type: Journal Article
• Authors: Xue, Zhong-Xin; Fang, Jin; Li, Jia; Zhang, Di; Xu, Zi-Wen; Liu, Li-Na; Yao, Jianhua; Ma, Chang-Qi; Li, Wei-Shi
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 8(2022)
• Page Start: 2945
• Page End: 2949
• Publication Date: 2022-02-11
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1tc05550j
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Other than multi-ring fused or non-covalent lock strategies, the work demonstrates the use of bulky and embracing type sidechains to force non-fused rings staying in a coplanar configuration for high performance non-fullerene electron acceptors. Abstract : A strategy involving bulky and "embracing"-type side chains for keeping the planarity of non-fused units was proposed and applied to the design of a non-fullerene acceptor (NFA) molecule. The NFA molecule iPrBT-NFA bearing a 2, 2′-bithiophene core with two bulky and embracing-type 2, 4, 6-triisopropylphenyl substituents at its 3, 3′ positions was demonstrated to display a planar core structure, red-shifted light absorption, finely regulated aggregation and much better photovoltaic performance than that shown by a reference molecule (DeBT-NFA ) having the same backbone but with long alkyl side chains.