articleNano LettersFeb 7, 2017Closed access

Potassium Incorporation for Enhanced Performance and Stability of Fully Inorganic Cesium Lead Halide Perovskite Solar Cells

JKJae Keun NamSUSung Uk ChaiWCWonhee ChaYJYung Ji ChoiWKWanjung Kim

Yonsei University · Sungkyunkwan University

PubMed
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Abstract

Thermally unstable nature of hybrid organic–inorganic perovskites has been a major obstacle to fabricating the long-term operational device. A cesium lead halide perovskite has been suggested as an alternative light absorber, due to its superb thermal stability. However, the phase instability and poor performance are hindering the further progress. Here, cesium lead halide perovskite solar cells with enhanced performance and stability are demonstrated via incorporating potassium cations. Based on Cs0.925K0.075PbI2Br, the planar-architecture device achieves a power conversion efficiency of 10.0%, which is a remarkable record in the field of inorganic perovskite solar cells. In addition, the device shows an…

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520
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Topics & keywords

Topics
Keywords
  • Halide
  • Caesium
  • Perovskite (structure)
  • Potassium
  • Lead (geology)
  • Materials science
  • Inorganic chemistry
  • Chemical engineering
UN Sustainable Development Goals
  • Affordable and clean energy
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