journal article·2023-12-25

Insight into the Defect Chemistry and Ion Migration in Perovskite Fabricated by Hybrid Chemical Vapor Deposition

Xiaoxue Wu, Xi Jin, Yuxuan Yang, Zijian Huang, Xiuxiu Niu, Yu Zhang, Zhaoheng Tang, Siyuan Zhu, Mingyue Han, Yingrui Xiao, Qi Chen, Huanping Zhou, Qijie Liang, Kangxian Guo, Yan Jiang

ACS Applied Energy Materials· Volume 6· Issue 24
Publisher page

Abstract

Hybrid chemical vapor deposition (CVD) is an industrially relevant thin-film deposition method and has demonstrated great advantages in large-area uniform perovskite film preparation. However, perovskite solar cells prepared by hybrid CVD suffer from low power conversion efficiency compared to those deposited by the solution methods. Herein, the origin of the efficiency gaps between hybrid CVD and solution methods is systematically investigated. Optical and electrical characterizations indicated a severe nonradiative recombination loss on the hybrid CVD-prepared perovskite. X-ray photoelectron spectroscopy and thermal admittance spectroscopy measurements revealed the iodine-rich surface and higher density of deep-level defects (i.e., I Pb and V Pb ) of hybrid CVD-prepared perovskite, which shorten the carrier lifetime via Shockley–Read–Hall recombination. These deep-level defects facilitate the migration of ions under bias, posing a concern for device operational stability. The fundamental understanding could pave the way for the advancement of hybrid CVD methods from a defect engineering perspective.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China

School of Physics and Materials Science, Guangzhou University, Guangzhou, Guangdong 510006, China

Songshan Lake Materials Laboratory, Dongguan, Guangdong 523429, China

MOE Key Laboratory of Laser Life Science & Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China

Department of Materials Science and Engineering, Peking University, Beijing 100081, China

Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China

Department of Physics, Liaoning University, Shenyang 110036, China

BTR New Material Group Co., Ltd., Shenzhen 518107, P. R. China

Funding

Basic and Applied Basic Research Foundation of Guangdong Province · Guangzhou Municipal Science and Technology Program key projects · National Natural Science Foundation of China · Natural Science Foundation of Guangdong Province

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