Achieving 17.46% Efficiency CsPbI2Br Perovskite Solar Cells via Multifunction Lead Chloride-Modified ZnO Electron Transporting Layer

Li，Yaru1,2,3; Zhang，Yong2,3; Zhu，Peide2; Li，Jingbai4; Wu，Jiawen1,2,3; Zhang，Jiyao2; Zhou，Xianyong2; Jiang，Zhengyan2; Wang，Xingzhu1,2,3,5; Xu，Baomin2,3

2023

10.1002/adfm.202309010

Advanced Functional Materials   Impact Factor & Quartile

1616-301X

1616-3028

CsPbIBr perovskite solar cells (PSCs) have garnered significant attention owing to their remarkable thermal stability and desirable bandgap. However, CsPbIBr-based devices still face critical challenges, particularly at the interfaces between the active layer and adjacent components. In this study, a multifunctional ZnO composition has developed as the electron transporting layer (ETL) for CsPbIBr PSCs, enabling simultaneous efficient charge extraction and passivation of buried interface defects in CsPbIBr. The nanocomposite, composed of PbCl-modified ZnO (PbCl-ZnO), facilitates the regulation of bandgap and conduction band to align the energy level of ETL and CsPbIBr. Additionally, the residual PbCl at the buried interface of the perovskite incorporates into the perovskite lattice, reducing I defect and thus improving film quality. The improved energy level alignment at the ETL/CsPbIBr interface and the suppressed I defect-induced carrier nonradiative recombination result in a remarkable reduction in energy loss from 0.73 to 0.52 eV. Finally, the PbCl-ZnO hybrid nanocomposite ETL significantly enhances the efficiency of CsPbIBr PSCs, increasing it from 14.15% to 17.46%, representing one of the highest reported power conversion efficiency (PCE) values for CsPbIBr PSCs. These findings demonstrate the potential of PbCl-ZnO hybrid nanocomposite as an effective ETL for CsPbIBr PSCs.

buried interface defect passivation CsPbI2Br perovskite solar cells energy level alignment PbCl2-ZnO Voc loss

SCI

English

NI Journal Papers

First ; Corresponding

Ministry of Science and Technology of China[2021YFB3800101] ; China Postdoctoral Science Foundation[2021M691410] ; National Natural Science Foundation of China["62204108","62104094","U19A2089"] ; Guangdong Basic and Applied Basic Research Foundation["2021A1515110628","2023A1515012797"] ; Shenzhen Science and Technology Innovation Committee["JCYJ20200109141014474","JCYJ20220530113205013","KCXST20221021111616039"]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001066383400001

WILEY-V C H VERLAG GMBH

MATERIALS SCIENCE

2-s2.0-85170688281

Scopus

1.Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,518055,China
2.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Key University Laboratory of Highly Efficient Utilization of Solar Energy and Sustainable Development of Guangdong,Southern University of Science and Technology,Shenzhen,518055,China
4.Hoffmann Institute of Advanced Materials,Shenzhen Polytechnic University,Shenzhen,518055,China
5.Shenzhen Putai Technology Co.,Ltd,Shenzhen,518110,China

Li，Yaru,Zhang，Yong,Zhu，Peide,et al. Achieving 17.46% Efficiency CsPbI2Br Perovskite Solar Cells via Multifunction Lead Chloride-Modified ZnO Electron Transporting Layer[J]. Advanced Functional Materials,2023.

Li，Yaru.,Zhang，Yong.,Zhu，Peide.,Li，Jingbai.,Wu，Jiawen.,...&Xu，Baomin.(2023).Achieving 17.46% Efficiency CsPbI2Br Perovskite Solar Cells via Multifunction Lead Chloride-Modified ZnO Electron Transporting Layer.Advanced Functional Materials.

Li，Yaru,et al."Achieving 17.46% Efficiency CsPbI2Br Perovskite Solar Cells via Multifunction Lead Chloride-Modified ZnO Electron Transporting Layer".Advanced Functional Materials (2023).