Mitigation of Morphological Defects in Methylammonium-Free Formamidinium-Based Perovskite Solar Cells
Source abstract
Abstract
Operational stability of perovskite solar cells (PSCs) is essential for commercial viability. In this work, we report our efforts to understand the impact of potassium cations on mitigating the morphological defects in the methylammonium-free formamidinium-based perovskite photoactive layer. The addition of potassium cations is favorable for the stable operation of FA0.85Cs0.1K0.05PbI3-based PSCs through retarding the transformation of the intermediate phases. FA0.85Cs0.1K0.05PbI3-based PSCs can retain 96% of the initial power conversion efficiency (PCE) after a 2 month accelerated aging test, whereas more than 40% drop in PCE is observed in FA0.9Cs0.1PbI3-based PSCs during the same aging test. The use of potassium cations provides a practical solution to mitigate the morphological defects in the perovskite layer and thereby enhances the operational stability of the FA0.85Cs0.1K0.05PbI3-based PSCs.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Organic Electronics and Photovoltaics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics, Research Centre of Excellence for Organic Electronics, and Institute of Advanced Materials, Hong Kong Baptist University, 224 Waterloo Road, Kowloon Tong NT, Hong Kong 99077, China
Funding
Research Grants Council, University Grants Committee · National Natural Science Foundation of China
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