DataVXACS Energy LettersPaper
journal article·2026-06-12

Migration-Resistant Phenylethylguanidinium Salts Stabilizing Perovskite Solar Cells

Rongxiu Liu, Xiaopeng Feng, Ranran Liu, Mingyuan Han, Shuangwei Lv, Xiaofan Du, Qichao Meng, Ziqiang Su, Boyang Lu, Yaliang Han, Lin Han, Chenghao Bi, Zhipeng Shao, Guohua Wu, Yong Ding, Guanglei Cui

ACS Energy Letters· Volume 11· Issue 6
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Source abstract

Abstract

Phenylethylammonium hydrohalide-based passivation layers mitigate trap-assisted recombination in perovskite solar cells by neutralizing defect states and optimizing band bending. However, these layers suffer from thermal instability due to ammonium salt decomposition and bulk migration. To address this, a thermally stable phenylethyl-grafted guanidinium (PEGA + ) interfacial layer is introduced. Its delocalized charge distribution, low adsorption energy, and hydrogen-bonding network prevent bulk migration, enhancing stability at elevated temperatures. PEGA + -modified perovskite solar cells (1.55 eV) achieved a power conversion efficiency (PCE) exceeding 26.2%, retaining over 96% of their maximum power after 1100 h and maintaining 89% of their initial performance for 800 h at 85 °C. This strategy is applicable across various device architectures, offering a new molecular design paradigm for long-term interfacial stability in perovskite solar cells.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · TiO2 Photocatalysis and Solar Cells · Organic Electronics and Photovoltaics

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

Affiliations

College of Materials Science and Chemical Engineering

Harbin Engineering University

State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy, Qingdao New Energy Shandong Laboratory, Qingdao Industrial Energy Storage Research Institute

Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Science

College of Chemistry Chemical Engineering and Materials Science

Shandong Normal University

School of Renewable Energy

Hohai University

College of Physics and Optoelectronic Engineering

Qingdao Innovation and Development Center of Harbin Engineering University

Center of Materials Science and Optoelectronics Engineering

University of Chinese Academy of Sciences

Funding

China Postdoctoral Science Foundation · Youth Innovation Promotion Association of the Chinese Academy of Sciences · Taishan Scholar Project of Shandong Province · Heilongjiang Provincial Science and Technology Department · Ministry of Science and Technology of the People's Republic of China · Department of Science and Technology of Shandong Province · Chinese Academy of Sciences

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