A conformally bonded molecular interface retarded iodine migration for durable perovskite solar cells

被引：51

作者：

Yuan, Ligang ^{[1
]}

Zhu, Weiya ^{[1
]}

Zhang, Yiheng ^{[1
]}

Li, Yuan ^{[1
]}

Chan, Christopher C. S. ^{[2
,3
]}

Qin, Minchao ^{[4
]}

Qiu, Jianhang ^{[5
]}

Zhang, Kaicheng ^{[6
]}

Huang, Jiaxing ^{[1
]}

Wang, Jiarong ^{[1
]}

Luo, Huiming ^{[1
]}

Zhang, Zheng ^{[1
]}

Chen, Ruipeng ^{[1
]}

Liang, Weixuan ^{[1
]}

Wei, Qi ^{[1
]}

Wong, Kam Sing ^{[2
,3
]}

Lu, Xinhui ^{[4
]}

Li, Ning ^{[1
]}

Brabec, Christoph J. ^{[6
,7
]}

Ding, Liming ^{[8
]}

Yan, Keyou ^{[1
]}

机构：

[1] South China Univ Technol, Inst Polymer Optoelect Mat & Devices, AIE Inst,State Key Lab Luminescent Mat & Devices,G, Guangdong Prov Key Lab Luminescence Mol Aggregates, Guangzhou 510000, Peoples R China

[2] Hong Kong Univ Sci & Technol, Dept Phys, Clearwater Bay, Hong Kong, Peoples R China

[3] Hong Kong Univ Sci & Technol, William Mong Inst Nano Sci & Technol, Clearwater Bay, Hong Kong, Peoples R China

[4] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong 999077, Peoples R China

[5] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

[6] Friedrich Alexander Univ Erlangen Nuremberg, Inst Mat Elect & Energy Technol I MEET, Martensstr 7, D-91058 Erlangen, Germany

[7] Forschungszentrum Julich, Helmholtz Inst Erlangen Nurnberg Renewable Energy, D-91058 Erlangen, Germany

[8] Natl Ctr Nanosci & Technol, Ctr Excellence Nanosci CAS, Key Lab Nanosyst & Hierarch Fabricat CAS, Beijing 100190, Peoples R China

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2023年 / 16卷 / 04期

基金：

中国国家自然科学基金;

关键词：

HOLE-TRANSPORTING MATERIALS; LOW-COST; EFFICIENT; PERFORMANCE; INDACENODITHIOPHENE; STABILITY; DESIGN;

D O I：

10.1039/d2ee03565k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

State-of-the-art n-i-p perovskite solar cells (PSCs) suffer from stability issues due to ionic interdiffusion. Herein, by enlarging the indacenodithiophene pi-bridge donor (D ') to combine with the methoxy triphenylamine donor (D) and benzothiadiazole acceptor (A), three linear molecules termed L1, L2 and L3 with a D-A-D '-A-D structure are developed as dopant-free hole transport materials (HTMs). The pi-bridge extension with active sites for coordination leverages the intramolecular dipole effect and intermolecular packing effect, resulting in a conformally bonded ultrathin interface with compact and uniform coverage (similar to 60 nm) to retard iodine migration and protect the buried perovskite. The unencapsulated L3-PSC (ITO/SnO2/perovskite/L3/MoO3/Au) achieved an impressive PCE of 22.61% (certified 21.79%, 0.0525 cm(2)). Ultrafast laser spectroscopy reveals that L-series molecules have a sequential reduction of photoexcited energy disorder to illustrate the structure-performance-stability relationship. L3-PSC maintains over 85% of the initial efficiency after 500 h at 85 degrees C maximum power point tracking (MPP) and enables the possibility of using small molecules to stabilize n-i-p PSCs.

引用

页码：1597 / 1609

页数：13

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