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Ternary Nonfullerene Polymer Solar Cells with 12.16% Efficiency by Introducing One Acceptor with Cascading Energy Level and Complementary Absorption
Jiang, Weigang; Yu, Runnan; Liu, Zhiyang; Peng, Ruixiang; Mi, Dongbo; Hong, Ling; Wei, Qiang; Hou, Jianhui; Kuang, Yongbo; Ge, Ziyi
2018
发表期刊ADVANCED MATERIALS
卷号30期号:1
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.
关键词Power Conversion Efficiency Open-circuit Voltage Small-molecule Electrolyte Organic Photovoltaics Conjugated Polymer Blends
学科领域Chemistry ; Electrochemistry ; Energy & Fuels
语种英语
文献类型期刊论文
条目标识符http://ir.nimte.ac.cn/handle/174433/16883
专题2018专题
推荐引用方式
GB/T 7714
Jiang, Weigang,Yu, Runnan,Liu, Zhiyang,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 Jiang, Weigang.,Yu, Runnan.,Liu, Zhiyang.,Peng, Ruixiang.,Mi, Dongbo.,...&Ge, Ziyi.(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 Jiang, Weigang,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).
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