Ternary Nonfullerene Polymer Solar Cells with 12.16% Efficiency by Introducing One Acceptor with Cascading Energy Level and Complementary Absorption

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2018专题

	Ternary Nonfullerene Polymer Solar Cells with 12.16% Efficiency by Introducing One Acceptor with Cascading Energy Level and Complementary Absorption
	Ge, Ziyi; Wei, Qiang; Hou, Jianhui; Kuang, Yongbo; Jiang, Weigang; Yu, Runnan; Liu, Zhiyang; Peng, Ruixiang; Mi, Dongbo; Hong, Ling
刊名	ADVANCED MATERIALS
	2018
卷号	30 期号:1
关键词	Power Conversion Efficiency Open-circuit Voltage Small-molecule Electrolyte Organic Photovoltaics Conjugated Polymer Blends
英文摘要	A novel small-molecule acceptor, (2,2-((5E,5E)-5,5-((5,5-(4,4,9,9-tetrakis(5-hexylthiophen-2-yl)-4,9-dihydro-s-indaceno[1,2-b:5,6-b]dithiophene-2,7-diyl)bis(4-(2-ethylhexyl)thiophene-5,2-diyl))bis(methanylylidene)) bis(3-hexyl-4-oxothiazolidine-5,2-diylidene))dimalononitrile (ITCN), end-capped with electron-deficient 2-(3-hexyl-4-oxothiazolidin-2-ylidene)malononitrile groups, is designed, synthesized, and used as the third component in fullerene-free ternary polymer solar cells (PSCs). The cascaded energy-level structure enabled by the newly designed acceptor is beneficial to the carrier transport and separation. Meanwhile, the three materials show a complementary absorption in the visible region, resulting in efficient light harvesting. Hence, the PBDB-T:ITCN:IT-M ternary PSCs possess a high short-circuit current density (J(sc)) under an optimal weight ratio of donors and acceptors. Moreover, the open-circuit voltage (V-oc) of the ternary PSCs is enhanced with an increase of the third acceptor ITCN content, which is attributed to the higher lowest unoccupied molecular orbital energy level of ITCN than that of IT-M, thus exhibits a higher V-oc in PBDB-T:ITCN binary system. Ultimately, the ternary PSCs achieve a power conversion efficiency of 12.16%, which is higher than the PBDB-T:ITM-based PSCs (10.89%) and PBDB-T:ITCN-based ones (2.21%). This work provides an effective strategy to improve the photovoltaic performance of PSCs.
学科主题	Chemistry ; Electrochemistry ; Energy & Fuels
语种	英语
公开日期	2018-12-04
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/16883]
专题	2018专题
推荐引用方式 GB/T 7714	Ge, Ziyi,Wei, Qiang,Hou, Jianhui,et al. Ternary Nonfullerene Polymer Solar Cells with 12.16% Efficiency by Introducing One Acceptor with Cascading Energy Level and Complementary Absorption[J]. ADVANCED MATERIALS,2018,30(1).
APA	Ge, Ziyi.,Wei, Qiang.,Hou, Jianhui.,Kuang, Yongbo.,Jiang, Weigang.,...&Hong, Ling.(2018).Ternary Nonfullerene Polymer Solar Cells with 12.16% Efficiency by Introducing One Acceptor with Cascading Energy Level and Complementary Absorption.ADVANCED MATERIALS,30(1).
MLA	Ge, Ziyi,et al."Ternary Nonfullerene Polymer Solar Cells with 12.16% Efficiency by Introducing One Acceptor with Cascading Energy Level and Complementary Absorption".ADVANCED MATERIALS 30.1(2018).