journal article·2022-03-07

In Situ Methylammonium Chloride-Assisted Perovskite Crystallization Strategy for High-Performance Solar Cells

Wei-Wei Zuo, Ying-Guo Yang, Wei-Fei Fu, Meng Li, Mahdi Malekshahi Byranvand, Diego Di Girolamo, Jorge Pascual, Meng-Qi Li, Li−Na Li, Antonio Abate, Michael Saliba, Zhao-Kui Wang

ACS Materials Letters· Volume 4· Issue 3
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Abstract

The optimization of perovskite crystallization is critical to achieving high-performance perovskite solar cells (PSCs). In the standard crystallization methods, the additives play an important role not only in optimizing the crystallization but also passivating the defect states of perovskite films. Methylammonium chloride (MACl) is one of the frequently used additives in this regard. However, the performance mechanism of MACl in the perovskite crystallization process still needs more investigation. This work presents the quality improvement of a perovskite film using MACl vapor as an external chlorine source. The in situ 2D-GIXRD and real-time X-ray diffraction characterizations provide a better understanding the performance mechanism of MACl. Our results demonstrate that exposing the perovskite film to the MACl vapor during the crystallization process can effectively enhance the film quality in addition to enlarging the grain sizes. As a result, the MAPbI3 film optimized by our process leads to highly efficient PSCs with a power conversion efficiency (PCE) of ∼21%.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Solid-state spectroscopy and crystallography · Quantum Dots Synthesis And Properties

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

Affiliations

Institute for Photovoltaics, University of Stuttgart, Pfaffenwaldring 47, 70569 Suttgart, Germany

Helmholtz-Zentrum Berlin für Materialien und Energie, Kekuléstraße 5, 12489 Berlin, Germany

Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Advanced Research Institute, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China

Institute of Materials Science, Technische Universität Darmstadt, Alarich-Weiss-Straße 2, 64287 Darmstadt, Germany

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

Helmholtz Young Investigator Group, lEK5-Photovoltaik, Forschungszentrum Jülich, Jülich 52425, Germany

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China

Funding

Deutsche Forschungsgemeinschaft · National Natural Science Foundation of China · Natural Science Foundation of Jiangsu Province

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