Dopant-Free Organic Hole-Transporting Material for Efficient and Stable Inverted All-Inorganic and Hybrid Perovskite Solar Cells

被引:223
作者
Jiang, Kui [1 ,2 ,3 ]
Wang, Jing [4 ]
Wu, Fei [1 ]
Xue, Qifan [5 ]
Yao, Qin [5 ]
Zhang, Jianquan [2 ,3 ]
Chen, Yihuang [6 ]
Zhang, Guangye [7 ]
Zhu, Zonglong [4 ]
Yan, He [2 ,3 ]
Zhu, Linna [1 ]
Yip, Hin-Lap [5 ]
机构
[1] Southwest Univ, Inst Clean Energy & Adv Mat, Chongqing 400715, Peoples R China
[2] Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Clear Water Bay, Hong Kong, Peoples R China
[3] Hong Kong Univ Sci & Technol, Energy Inst, Kowloon, Clear Water Bay, Hong Kong, Peoples R China
[4] City Univ Hong Kong, Dept Chem, Kowloon, Hong Kong, Peoples R China
[5] South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China
[6] Wenzhou Univ, Coll Chem & Mat Engn, Wenzhou 325035, Zhejiang, Peoples R China
[7] eFlexPV Ltd China, Shenzhen 518110, Peoples R China
基金
中国国家自然科学基金;
关键词
all-inorganic perovskites; device stability; hole-transporting materials; inverted perovskite solar cells; passivation effect; STABILITY; CONDUCTOR; LAYER;
D O I
10.1002/adma.201908011
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Designing new hole-transporting materials (HTMs) with desired chemical, electrical, and electronic properties is critical to realize efficient and stable inverted perovskite solar cells (PVSCs) with a p-i-n structure. Herein, the synthesis of a novel 3D small molecule named TPE-S and its application as an HTM in PVSCs are shown. The all-inorganic inverted PVSCs made using TPE-S, processed without any dopant or post-treatment, are highly efficient and stable. Compared to control devices based on the commonly used HTM, PEDOT:PSS, devices based on TPE-S exhibit improved optoelectronic properties, more favorable interfacial energetics, and reduced recombination due to an improved trap passivation effect. As a result, the all-inorganic CsPbI2Br PVSCs based on TPE-S demonstrate a remarkable efficiency of 15.4% along with excellent stability, which is the one of the highest reported values for inverted all-inorganic PVSCs. Meanwhile, the TPE-S layer can also be generally used to improve the performance of organic/inorganic hybrid inverted PVSCs, which show an outstanding power conversation efficiency of 21.0%, approaching the highest reported efficiency for inverted PVSCs. This work highlights the great potential of TPE-S as a simple and general dopant-free HTM for different types of high-performance PVSCs.
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页数:7
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