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

Wen，Qiaoyun1; Duan，Chenghao1; Zou，Feilin1; Luo，Dou2; Li，Jiong1; Liu，Zidan1; Wang，Jiarong1; Yan，Keyou1

2023-01-15

10.1016/j.cej.2022.139697

CHEMICAL ENGINEERING JOURNAL   Impact Factor & Quartile

1385-8947

1873-3212

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 CsPbSnIBr film. The strong coordination bonding between DCD and Pb/Sn not only effectively eliminates the pin-holes but also inhibits the oxidation of Sn at low temperature. The power conversion efficiency (PCE) of inverted PSC (ITO/NiO/CsPbSnIBr:DCD/ZnO/PCBM/Ag) is improved from 10.53% to 14.17% (0.1 cm), 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/NiO/CsPbIBr:DCD/TiSnO/IZO/MgF) with CsPbSnIBr: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.

All-inorganic tandem Antioxidation Coordination CsPb1-xSnxI2Br Dicyandiamide

SCI

English

Others

National Natural Science Foundation of China[U2001217] ; Guangdong Science and Technology Program["2020B121201003","2019ZT08L075","2019QN01L118"]

Engineering

Engineering, Environmental ; Engineering, Chemical

WOS:000887235000003

ELSEVIER SCIENCE SA

ENGINEERING

2-s2.0-85139999209

Scopus

1.School of Environment and Energy,State Key Laboratory of Luminescent Material and Devices,Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling,South China University of Technology,Guangzhou,Guangdong,510000,China
2.Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting,Department of Electrical & Electronic Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Wen，Qiaoyun,Duan，Chenghao,Zou，Feilin,et al. All-inorganic CsPb1-xSnxI2Br perovskites mediated by dicyandiamide additive for efficient 4-terminal tandem solar cell[J]. CHEMICAL ENGINEERING JOURNAL,2023,452.

Wen，Qiaoyun.,Duan，Chenghao.,Zou，Feilin.,Luo，Dou.,Li，Jiong.,...&Yan，Keyou.(2023).All-inorganic CsPb1-xSnxI2Br perovskites mediated by dicyandiamide additive for efficient 4-terminal tandem solar cell.CHEMICAL ENGINEERING JOURNAL,452.

Wen，Qiaoyun,et al."All-inorganic CsPb1-xSnxI2Br perovskites mediated by dicyandiamide additive for efficient 4-terminal tandem solar cell".CHEMICAL ENGINEERING JOURNAL 452(2023).