Revealing the effects of molecular packing on the performances of polymer solar cells based on A-D-C-D-A type non-fullerene acceptors

doi:10.1039/c8ta03753a

	Revealing the effects of molecular packing on the performances of polymer solar cells based on A-D-C-D-A type non-fullerene acceptors
	Li, Shuixing 1; Zhan, Lingling 1; Zhao, Wenchao 2,4; Zhang, Shuhua 1; Ali, Basharat 1; Fu, Zhisheng 1; Lau, Tsz-Ki 3; Lu, Xinhui 3; Shi, Minmin 1; Li, Chang-Zhi 1
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2018-07-07
卷号	6 期号:25 页码:12132-12141
ISSN号	2050-7488
DOI	10.1039/c8ta03753a
英文摘要	Although the power conversion efficiencies (PCEs) of polymer solar cells (PSCs) based on non-fullerene acceptors have been increasing rapidly over the last couple of years, little is known about the correlations between molecular structures and blend morphologies. In this work, we design and synthesize three acceptor-donor-core-donor-acceptor (A-D-C-D-A) type non-fullerene acceptors, HF-PCIC, HFO-PCIC and OF-PCIC, which possess the same electron-donating parts (D) and electron-accepting terminals (A), but different benzene-based cores (C). We observe that such minor chemical variations can lead to distinct differences in their photovoltaic properties. The resulting PSCs based on HF-PCIC with a 2,5-difluorobenzene core yield a good PCE of 10.97%, which is higher than those of HFO-PCIC and OF-PCIC based PSCs (8.36% and 9.09%). If the processing solvent is changed from chlorobenzene to chloroform, a further improved PCE of 11.49% is obtained for HF-PCIC-based PSCs due to the formation of finer phase separation domains. This is the highest value among the PSCs with non-fullerene acceptors possessing unfused cores. Through a series of characterization techniques, we disclose that the diverse benzene-based cores influence the molecular geometries of the three non-fullerene acceptors, resulting in varied molecular packing modes and film morphologies. The results suggest that the tuning of non-fullerene acceptors' geometries is an effective method to optimize the film morphology and thus the photovoltaic properties. The unfused-core in A-D-C-D-A small molecules provides a good building block to construct high-performance non-fullerene acceptors.
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000436516700057
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/41939]
专题	化学研究所_高分子物理与化学实验室
通讯作者	Shi, Minmin; Hou, Jianhui; Chen, Hongzheng
作者单位	1.Zhejiang Univ, Dept Polymer Sci & Engn, MOE Key Lab Macromol Synth & Functionalizat, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China 2.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China 3.Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li, Shuixing,Zhan, Lingling,Zhao, Wenchao,et al. Revealing the effects of molecular packing on the performances of polymer solar cells based on A-D-C-D-A type non-fullerene acceptors[J]. JOURNAL OF MATERIALS CHEMISTRY A,2018,6(25):12132-12141.
APA	Li, Shuixing.,Zhan, Lingling.,Zhao, Wenchao.,Zhang, Shuhua.,Ali, Basharat.,...&Chen, Hongzheng.(2018).Revealing the effects of molecular packing on the performances of polymer solar cells based on A-D-C-D-A type non-fullerene acceptors.JOURNAL OF MATERIALS CHEMISTRY A,6(25),12132-12141.
MLA	Li, Shuixing,et al."Revealing the effects of molecular packing on the performances of polymer solar cells based on A-D-C-D-A type non-fullerene acceptors".JOURNAL OF MATERIALS CHEMISTRY A 6.25(2018):12132-12141.