journal article·2024-12-13

Rubidium Induced Phase Regulation for High-Performance Quasi-2D Perovskite Solar Cells

Bo Xu, Rong Yang, Yu Chen, Jinfei Zhou, Wen Liang Tan, Pinghui Yang, Fengwei Wang, Xiliu Wang, Wenbo Liu, Xuan Gao, Jingwei Li, Daliang Zhang, Christopher R. McNeill, Renzhi Li, Wei Huang, Jianpu Wang

ACS Energy Letters· Volume 9· Issue 12
Publisher page

Abstract

Quasi-two-dimensional (2D) perovskites are notable for their diverse formulations and environmental stability. However, solution-processed quasi-2D perovskites often exhibit inherent multiple-quantum-well structures with broad phase distributions, limiting their efficiency in photovoltaic applications. Here, we demonstrate that incorporating rubidium ions effectively narrows the phase distribution in quasi-2D perovskite by accelerating the formation of the n = 1 2D perovskite phase during the initial crystallization stage. This leads to a decrease in the remaining free organic spacer cations, which in turn limits the transition to medium- n phases ( n = 3, 4) and promotes the formation of high-quality 3D-like or large- n perovskites, ultimately enhancing charge transport of quasi-2D perovskite. Consequently, we achieve quasi-2D perovskite solar cells with a champion power conversion efficiency of 21.9%. Furthermore, the thermal stability of the unencapsulated devices containing rubidium is significantly improved, with the T80 lifetime under continuous 60 °C stress increasing from 1150 to over 3000 h.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Advanced Memory and Neural Computing

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

Affiliations

Key Laboratory of Flexible Electronics (KLOFE), School of Flexible Electronics (Future Technologies) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China

Electronic Engineering Department, The Chinese University of Hong Kong, Shatin, NT 999077, Hong Kong SAR, China

Multi-scale Porous Materials Center, Institute of Advanced Interdisciplinary Studies and School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China

Department of Materials Science and Engineering, Monash University, Wellington Road, Clayton, Victoria 3800, Australia

Australian Synchrotron, ANSTO, 800 Blackburn Road, Clayton, Victoria 3168, Australia

Shaanxi Institute of Flexible Electronics (SIFE), Xi’an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi’an 710072, China

School of Materials Science and Engineering & School of Microelectronics and Control Engineering, Changzhou University, Changzhou, Jiangsu 213164, China

Funding

National Key Research and Development Program of China · Natural Science Foundation of Jiangsu Province · Nanjing Tech University · Jiangsu Provincial Department of Science and Technology · National Natural Science Foundation of China

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