Ternary Organic Solar Cells with &gt; 11% Efficiency Incorporating Thick Photoactive Layer and Nonfullerene Small Molecule Acceptor

doi:10.1002/aenm.201701691

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	Ternary Organic Solar Cells with > 11% Efficiency Incorporating Thick Photoactive Layer and Nonfullerene Small Molecule Acceptor
	Zhang, Tong 1,2,3; Zhao, Xiaoli 1,2; Yang, Dalei 2; Tian, Yumeng 2; Yang, Xiaoniu 1,2
刊名	ADVANCED ENERGY MATERIALS
	2018-02-05
卷号	8 期号:4
关键词	Film Morphology Nonfullerene Small Molecular Acceptor Ternary Organic Solar Cells Thick Photoactive Layer
ISSN号	1614-6832
DOI	10.1002/aenm.201701691
英文摘要	Currently, constructing ternary organic solar cells (OSCs) and developing nonfullerene small molecule acceptors (n-SMAs) are two pivotal avenues to enhance the device performance. However, introducing n-SMAs into the ternary OSCs to construct thick layer device is still a challenge due to their inferior charge transport property and unclear aggregation mechanism. In this work, a novel wide band gap copolymer 4,8-bis(4,5-dioctylthiophen-2-yl) benzo[1,2-b:4,5-b]dithiophene-2,6-diyl-alt-N-(2-hexyldecyl)-5,5-bis(thiophen-2-yl)-2,2-bithiophene-3,3-dicarboximide (PDOT) is designed and blend of PDOT:PC71BM achieves a power conversion efficiency (PCE) of 9.5% with active layer thickness over 200 nm. The rationally selected n-SMA based on a bulky seven-ring fused core (indacenodithieno[3,2-b]thiophene) end-capped with 2-(3-oxo-2,3-dihydroinden-1-ylidene) malononitrile groups (ITIC) is introduced into the host binary PDOT:PC71BM system to extend the absorption range and reduce the photo energy loss. After fully investigating the morphology evolution of the ternary blends, the different aggregation behavior of n-SMAs with respect to their fullerene counterpart is revealed and the adverse effect of introducing n-SMAs on charge transport is successfully avoided. The ternary OSC delivers a PCE of 11.2% with a 230 nm thick active layer, which is among the highest efficiencies of thick layer OSCs. The results demonstrate the feasibility of using n-SMAs to construct a thick layer ternary device for the first time, which will greatly promote the efficiency of thick layer ternary devices.
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000424152200014
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/45537]
专题	中国科学院化学研究所
通讯作者	Zhao, Xiaoli; Yang, Xiaoniu
作者单位	1.Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Changchun Inst Appl Chem, Changchun 130022, Jilin, Peoples R China 2.Chinese Acad Sci, Polymer Composites Engn Lab, Changchun Inst Appl Chem, Changchun 130022, Jilin, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Tong,Zhao, Xiaoli,Yang, Dalei,et al. Ternary Organic Solar Cells with > 11% Efficiency Incorporating Thick Photoactive Layer and Nonfullerene Small Molecule Acceptor[J]. ADVANCED ENERGY MATERIALS,2018,8(4).
APA	Zhang, Tong,Zhao, Xiaoli,Yang, Dalei,Tian, Yumeng,&Yang, Xiaoniu.(2018).Ternary Organic Solar Cells with > 11% Efficiency Incorporating Thick Photoactive Layer and Nonfullerene Small Molecule Acceptor.ADVANCED ENERGY MATERIALS,8(4).
MLA	Zhang, Tong,et al."Ternary Organic Solar Cells with > 11% Efficiency Incorporating Thick Photoactive Layer and Nonfullerene Small Molecule Acceptor".ADVANCED ENERGY MATERIALS 8.4(2018).