Beach-Chair-Shaped Energy Band Alignment for High-Performance β-CsPbI3 Solar Cells

Kang Wang; Qingwen Tian; Guangtao Zhao; Jialun Wen; Jin Huang; Changji Gao; Zhuo Xu; Yucheng Liu; Lei Liang; Lina Meng; Lu Zhang; Zhike Liu; Zhiwen Jin; Selina Olthof; Shengzhong (Frank) Liu

Cell Reports Physical Science (Sep 2020)

Beach-Chair-Shaped Energy Band Alignment for High-Performance β-CsPbI3 Solar Cells

Kang Wang,
Qingwen Tian,
Guangtao Zhao,
Jialun Wen,
Jin Huang,
Changji Gao,
Zhuo Xu,
Yucheng Liu,
Lei Liang,
Lina Meng,
Lu Zhang,
Zhike Liu,
Zhiwen Jin,
Selina Olthof,
Shengzhong (Frank) Liu

Affiliations

Kang Wang: Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, P.R. China
Qingwen Tian: Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, P.R. China; Corresponding author
Guangtao Zhao: Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, P.R. China
Jialun Wen: Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, P.R. China
Jin Huang: Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, P.R. China
Changji Gao: Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, P.R. China
Zhuo Xu: Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, P.R. China
Yucheng Liu: Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, P.R. China
Lei Liang: Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, P.R. China
Lina Meng: Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, P.R. China
Lu Zhang: Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, P.R. China
Zhike Liu: Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, P.R. China
Zhiwen Jin: School of Physical Science and Technology & Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, P.R. China
Selina Olthof: Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, P.R. China; Institute of Physical Chemistry, Department of Chemistry, University of Cologne, Luxemburger Str. 116, 50939 Cologne, Germany; Corresponding author
Shengzhong (Frank) Liu: Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, P.R. China; Dalian National Laboratory for Clean Energy, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, P.R. China; University of the Chinese Academy of Sciences, Beijing 100039, P.R. China; Corresponding author

Journal volume & issue: Vol. 1, no. 9
p. 100180

Abstract

Read online

Summary: CsPbI3 perovskite has drawn worldwide attention because of its thermal stability and outstanding photovoltaic performance. However, further improvement of CsPbI3 device performance is hindered by significant energy losses via charge-carrier recombination at the CsPbI3/transport layer interface and moisture sensitivity. Here, a beach-chair-shaped band structure is designed to introduce energy level gradients at both sides of the perovskite layer to steer optimal energy band alignment and heterojunction interface passivation in β-CsPbI3 perovskite solar cells (PSCs), resulting in suppressed interfacial recombination, enhanced charge extraction, and more robust stability. As a result, champion solar cell efficiency is increased to as much as 17.12%, one of the highest in reported CsPbI3 PSCs, and the Voc of 1.15 V is among the highest reported values. Furthermore, bare PSCs without encapsulation retain 90.4% of their initial cell efficiency after being stored for 1 month under ambient conditions.

Published in Cell Reports Physical Science

ISSN: 2666-3864 (Online)
Publisher: Elsevier
Country of publisher: United States
LCC subjects: Science: Physics
Website: https://www.cell.com/cell-reports-physical-science

About the journal