Effect of polymer molecular weight and processing solvent on the morphology and photovoltaic performance of inverted non-fullerene solar cells

doi:10.1016/j.dyepig.2021.109560

	Effect of polymer molecular weight and processing solvent on the morphology and photovoltaic performance of inverted non-fullerene solar cells
	Zheng, Xinming 1,2; Lu, Hao 2; Feng, Shiyu 2; Hou, Ran 2; Liu, Wenlong 1,2; Ming, Shouli 2; Xu, Xinjun 2; Wu, Youzhi 1; Bo, Zhishan 2
刊名	DYES AND PIGMENTS
	2021-10
卷号	194
关键词	Polymer solar cells Polymer molecular weight Processing solvent
ISSN号	0143-7208
DOI	10.1016/j.dyepig.2021.109560
英文摘要	Nonfullerene acceptors (NFAs) usually exhibit narrower bandgaps and stronger aggregation than fullerene derivatives, so donor polymers compatible with NFAs to achieve high-performance photoelectric conversion are presently limited to only several popular examples. To boost the device efficiency without changing the molecular structure of the material, we investigate the influence of polymer's molecular weights on the photovoltaic performance of polymer solar cells (PSCs). It was found that the molecular weight of a typical donor polymer (PBDB-T) can significantly impact on the film microstructure, charge transport and device performance of NFA based PSCs. Moreover, we find that changing the processing solvent exerts various impacts on the trend of the influence of molecular weight upon the performance of the device. Polymers with both a high and a low molecular weight can demonstrate a comparable photoelectric conversion efficiency, depending on what kind of processing solvent is used. It is concluded that in order to obtain a better morphology, charge carrier mobility and high device efficiency, polymers with a high molecular weight prefer to choose a solvent with a better solubility, while the ones with a low molecular weight would rather use a solvent with a weaker solubility.
WOS研究方向	Chemistry ; Engineering ; Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000685515200001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148765]
专题	材料科学与工程学院
作者单位	1.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China; 2.Beijing Normal Univ, Coll Chem, Beijing Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Xinming,Lu, Hao,Feng, Shiyu,et al. Effect of polymer molecular weight and processing solvent on the morphology and photovoltaic performance of inverted non-fullerene solar cells[J]. DYES AND PIGMENTS,2021,194.
APA	Zheng, Xinming.,Lu, Hao.,Feng, Shiyu.,Hou, Ran.,Liu, Wenlong.,...&Bo, Zhishan.(2021).Effect of polymer molecular weight and processing solvent on the morphology and photovoltaic performance of inverted non-fullerene solar cells.DYES AND PIGMENTS,194.
MLA	Zheng, Xinming,et al."Effect of polymer molecular weight and processing solvent on the morphology and photovoltaic performance of inverted non-fullerene solar cells".DYES AND PIGMENTS 194(2021).