journal article·2022-12-09

π-Conjugated Carbazole Cations Enable Wet-Stable Quasi-2D Perovskite Photovoltaics

Jien Yang, Tingwei He, Meng Li, Guixiang Li, Hairui Liu, Jinjin Xu, Meng Zhang, Weiwei Zuo, Ruiping Qin, Mahmoud H. Aldamasy, Mingjian Yuan, Zhe Li, Mahdi Malekshahi Byranvand, Michael Saliba, Antonio Abate

ACS Energy Letters· Volume 7· Issue 12
Publisher page

Abstract

Quasi-two-dimensional halide perovskites are commonly used in solar cells, as they are more stable than their three-dimensional analogues. Nevertheless, it is still challenging to meet the stability requirements under high-humidity conditions. Here, we design π-conjugated carbazole (CA) cations to increase the water resistance of perovskite. We control the crystallization kinetics by the anti-solvent strategy to locate the hydrophobic low-⟨n⟩-value phase on the surface of the perovskite film. The resulting CA2MA4Pb5I16 film does not decompose after being immersed in water for several minutes. We further regulate the vertical orientation of perovskite crystals by introducing NH4SCN additive, resulting in improved carrier transport dynamics. As a result, the optimized CA2MA4Pb5I16 device achieves a notable power conversion efficiency (PCE) of 18.23% and retains more than 85% of the original PCE after 2000 h under a relative humidity of 65% at 25 °C. This is one of the most stable reported unencapsulated perovskite solar cells in high-humidity environments.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Coral and Marine Ecosystems Studies

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

Affiliations

School of Materials Science and Engineering, Henan Key Laboratory of Photovoltaic Materials, Henan Normal University, Xinxiang 453007, China

Department of Chemistry, Nankai University, Tianjin 300071, China

Province-Ministry Co-construction Collaborative Innovation Center of Hebei Photovoltaic Technology, Hebei Key Laboratory of Optic-electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, China

Key Lab for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China

School of Engineering and Materials Science (SEMS), Queen Mary University of London, London E1 4NS, U.K.

Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109 Berlin, Germany

Institute for Photovoltaics (ipv), University of Stuttgart Pfaffenwaldring 47, 70569 Stuttgart, Germany

Egyptian Petroleum Research Institute, Cairo 11727, Egypt

Helmholtz Young Investigator Group FRONTRUNNER, IEK5-Photovoltaik, Forschungszentrum Jülich, 52425, Jülich, Germany

Department of Chemical, Materials and Production Engineering, University of Naples Federico II, pzz.le Vincenzo Tecchio 80, 80125 Naples, Italy

Funding

Hebei University · China Scholarship Council · National Natural Science Foundation of China

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