Improved Carrier Management via a Multifunctional Modifier for High-Quality Low-Bandgap Sn-Pb Perovskites and Efficient All-Perovskite Tandem Solar Cells

被引：98

作者：

Luo, Jincheng ^{[1
]}

He, Rui ^{[1
]}

Lai, Huagui ^{[2
]}

Chen, Cong ^{[1
]}

Zhu, Jingwei ^{[1
]}

Xu, Yuliang ^{[1
]}

Yao, Fang ^{[3
]}

Ma, Tianshu ^{[4
,5
,6
]}

Luo, Yi ^{[1
]}

Yi, Zongjin ^{[1
]}

Jiang, Yiting ^{[1
]}

Gao, Zhiyu ^{[1
]}

Wang, Juncheng ^{[1
]}

Wang, Wenwu ^{[1
]}

Huang, Hao ^{[7
,8
]}

Wang, Ye ^{[9
]}

Ren, Shengqiang ^{[1
]}

Lin, Qianqian ^{[3
]}

Wang, Changlei ^{[4
,5
,6
]}

Fu, Fan ^{[2
]}

Zhao, Dewei ^{[1
]}

机构：

[1] Sichuan Univ, Coll Mat Sci & Engn, Engn Res Ctr Alternat Energy Mat & Devices, Minist Educ, Chengdu 610065, Peoples R China

[2] Empa Swiss Fed Labs Mat Sci & Technol, Lab Thin Films & Photovolta, Ueberlandstr 129, CH-8600 Dubendorf, Switzerland

[3] Wuhan Univ, Sch Phys & Technol, Key Lab Artificial Micro & Nanostruct, Minist Educ China, Wuhan 430072, Peoples R China

[4] Soochow Univ, Sch Optoelect Sci & Engn, Suzhou 215006, Peoples R China

[5] Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Key Lab Adv Opt Mfg Technol Jiangsu Prov, Suzhou 215006, Peoples R China

[6] Soochow Univ, Key Lab Modern Opt Technol Educ, Minist China, Suzhou 215006, Peoples R China

[7] Guangxi Univ, State Key Lab Featured Met Mat & Life Cycle Safety, Nanning 530004, Peoples R China

[8] Guangxi Univ, Sch Resources Environm & Mat, Nanning 530004, Peoples R China

[9] Zhengzhou Univ, Sch Phys & Microelect, Key Lab Mat Phys, Minist Educ, Zhengzhou 450052, Peoples R China

来源：

ADVANCED MATERIALS | 2023年 / 35卷 / 22期

基金：

中国国家自然科学基金; 国家重点研发计划; 瑞士国家科学基金会;

关键词：

all-perovskite tandem solar cells; carrier management; defect passivation; electron transfer; low-bandgap perovskites; OPEN-CIRCUIT VOLTAGE; RECOMBINATION;

D O I：

10.1002/adma.202300352

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

All-perovskite tandem solar cells (TSCs) hold great promise in terms of ultrahigh efficiency, low manufacturing cost, and flexibility, stepping forward to the next-generation photovoltaics. However, their further development is hampered by the relatively low performance of low-bandgap (LBG) tin (Sn)-lead (Pb) perovskite solar cells (PSCs). Improving the carrier management, including suppressing trap-assisted non-radiative recombination and promoting carrier transfer, is of great significance to enhance the performance of Sn-Pb PSCs. Herein, a carrier management strategy is reported for using cysteine hydrochloride (CysHCl) simultaneously as a bulky passivator and a surface anchoring agent for Sn-Pb perovskite. CysHCl processing effectively reduces trap density and suppresses non-radiative recombination, enabling the growth of high-quality Sn-Pb perovskite with greatly improved carrier diffusion length of >8 mu m. Furthermore, the electron transfer at the perovskite/C-60 interface is accelerated due to the formation of surface dipoles and favorable energy band bending. As a result, these advances enable the demonstration of champion efficiency of 22.15% for CysHCl-processed LBG Sn-Pb PSCs with remarkable enhancement in both open-circuit voltage and fill factor. When paired with a wide-bandgap (WBG) perovskite subcell, a certified 25.7%-efficient all-perovskite monolithic tandem device is further demonstrated.

引用

页数：11

共 56 条

[1] Monolithic perovskite/silicon tandem solar cell with >29% efficiency by enhanced hole extraction [J].