Efficient and moisture-resistant organic solar cells via simultaneously reducing the surface defects and hydrophilicity of an electron transport layer

被引：22

作者：

Gao, Xueman ^{[1
]}

Su, Zhenhuang ^{[2
]}

Qu, Shengchun ^{[3
]}

Zhang, Wenzhi ^{[4
,5
]}

Gao, Yueyue ^{[1
]}

He, Shenghua ^{[1
]}

Wang, Zhijie ^{[2
]}

Shang, Luwen ^{[1
]}

Dong, Guohua ^{[4
,5
]}

Yue, Gentian ^{[1
]}

Tan, Furui ^{[1
]}

Wang, Zhangguo ^{[2
]}

机构：

[1] Henan Univ, Key Lab Photovolta Mat, Kaifeng 475004, Peoples R China

[2] Chinese Acad Sci, Shanghai Adv Res Inst, Zhangjiang Lab, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China

[3] Chinese Acad Sci, Inst Semicond, Key Lab Semicond Mat Sci, Beijing Key Lab Low Dimens Semicond Mat & Devices, Beijing 100083, Peoples R China

[4] Qiqihar Univ, Coll Chem & Chem Engn, Qiqihar 161006, Peoples R China

[5] Qiqihar Univ, Heilongjiang Ind Hemp Proc Technol Innovat Ctr, Qiqihar 161006, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2021年 / 9卷 / 38期

基金：

黑龙江省自然科学基金;

关键词：

PERFORMANCE; ACCEPTOR; INTERLAYERS; COPOLYMERS; DONOR;

D O I：

10.1039/d1tc03409j

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Organic solar cells (OSCs) simultaneously featuring good photovoltaic performance and strong humidity resistance are greatly anticipated for their practical application. Herein, we developed a simple organic trisiloxane molecule (denoted as TSi), and applied it to modify sol-gel ZnO (sg-ZnO) films. Compared to pristine sg-ZnO films, the TSi/sg-ZnO film presents fewer surface defects, shallower work function, and stronger hydrophobicity. Benefiting from those improved characteristics, when adopting a benzodifuran (BDF)-based polymer (BDFP-Bz) and Y6 as the electron donor and acceptor to fabricate OSCs, the derived devices utilizing TSi/sg-ZnO as the electron transport layer (ETL) showed suppressed charge recombination, enhanced charge extraction and increased stability to moisture versus the devices based on an sg-ZnO ETL. Meanwhile, PBDFP-Bz:Y6 OSCs based on a TSi/sg-ZnO ETL delivered a higher PCE of 14.62% than that of the control devices (12.39%). More importantly, the TSi/sg-ZnO ETL was also applicable in other different photovoltaic systems, among which PM6:Y6 OSCs based on a TSi/sg-ZnO ETL yielded a superior PCE of 16.37% along with stronger stability to moisture versus the reference ones. Our finding demonstrates the TSi/sg-ZnO bilayer ETL holds promise in the practical application of OSCs for simultaneously improving the photovoltaic performance and moisture-resistance of devices.

引用

页码：13500 / 13508

页数：9

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