All-inorganic CsPb1-xSnxI2Br perovskites mediated by dicyandiamide additive for efficient 4-terminal tandem solar cell

被引：27
作者：
Wen, Qiaoyun [1 ]
Duan, Chenghao [1 ]
Zou, Feilin [1 ]
Luo, Dou [2 ]
Li, Jiong [1 ]
Liu, Zidan [1 ]
Wang, Jiarong [1 ]
Yan, Keyou [1 ]
机构：
[1] South China Univ Technol, Sch Environm & Energy, State Key Lab Luminescent Mat & Devices, Guangdong Prov Key Lab Solid Wastes Pollut Control, Guangzhou 510000, Guangdong, Peoples R China
[2] Southern Univ Sci & Technol, Guangdong Univ, Dept Elect & Elect Engn, Key Lab Adv Quantum Dot Displays & Lighting, Shenzhen 518055, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2023年 / 452卷
基金：
中国国家自然科学基金;
关键词：
CsPb1-x Sn-x I-2 Br; Dicyandiamide; Coordination; Antioxidation; All -inorganic tandem; SURFACE PASSIVATION; LEAD IODIDE; CSPBI2BR; METHYLAMMONIUM; LAYERS;
D O I：
10.1016/j.cej.2022.139697
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Sn-Pb mixed perovskite solar cells (PSCs) have attracted research attention due to their application in tandem solar cells, but suffered from pin-hole morphology and device instability. In this work, dicyandiamide (DCD) is used as an antioxidative additive to regulate the crystallization and passivation of all-inorganic CsPb1-xSnxI2Br film. The strong coordination bonding between DCD and Pb/Sn not only effectively eliminates the pin-holes but also inhibits the oxidation of Sn2+ at low temperature. The power conversion efficiency (PCE) of inverted PSC (ITO/NiOx/CsPb0.6Sn0.4I2Br:DCD/ZnO/PC61BM/Ag) is improved from 10.53% to 14.17% (0.1 cm2), which is also one of the highest efficiencies of all-inorganic Sn-Pb mixed PSC. Meanwhile, compare with the control devices, the target device exhibits better stability after a series of tests. In addition, combining semitransparent 1.92-eV-bandgap top PSC (ITO/NiOx/CsPbI2Br:DCD/Ti0.9Sn0.1O2/IZO/MgF2) with CsPb0.6Sn0.4I2Br:DCD (1.54 eV) bottom PSC, an efficiency of 19.61% is demonstrated in all-inorganic 4-terminal (4T) tandem PSC. This work paves the way towards efficient all-inorganic perovskite tandem solar cells.
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页数：9
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