Fused selenophene-thieno[3,2-b]thiophene-selenophene (ST)-based narrow-bandgap electron acceptor for efficient organic solar cells with small voltage loss

被引：41

作者：

Liao, Xunfan ^{[1
,2
]}

Shi, Xueliang ^{[3
]}

Zhang, Ming ^{[6
]}

Gao, Ke ^{[4
]}

Zuo, Lijian ^{[4
]}

Liu, Feng ^{[6
]}

Chen, Yiwang ^{[1
,2
]}

Jen, Alex K. -Y. ^{[4
,5
]}

机构：

[1] Donghua Univ, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China

[2] Donghua Univ, Coll Mat Sci & Engn, Shanghai 201620, Peoples R China

[3] East China Normal Univ, Shanghai Key Lab Green Chem & Chem Proc, Sch Chem & Mol Engn, Shanghai 200062, Peoples R China

[4] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA

[5] City Univ Hong Kong, Dept Chem, Kowloon, Hong Kong 999077, Peoples R China

[6] Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China

来源：

CHEMICAL COMMUNICATIONS | 2019年 / 55卷 / 57期

关键词：

POLYMERS; DESIGN;

D O I：

10.1039/c9cc03585k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A novel near-infrared-light-absorbing fused-ring electron acceptor, STIC, was developed for organic solar cells. STIC exhibited a narrow bandgap with an absorption edge reaching 940 nm, which was ascribed to the strong electron-rich selenophene-thieno[3,2-b]thiophene-selenophene (ST) unit and strong intramolecular charge transfer of STIC. Also, STIC-based devices showed low open-circuit voltage (V-oc) loss values, attributed to the rigid ST core providing low reorganization energy. The device based on the PBDB-T:STIC blend exhibited a power conversion efficiency (PCE) of 9.68% with a high short-circuit current density (J(sc)) of 19.96 mA cm(-2) and a low V-oc loss of 0.55 eV.

引用

页码：8258 / 8261

页数：4

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