4.7 Article

Large grain size with reduced non-radiative recombination in potassium incorporated methylammonium-free perovskite solar cells

期刊

出版社

ELSEVIER
DOI: 10.1016/j.solmat.2022.111964

关键词

Perovskite solar cell; Photovoltaics; Potassium iodide

资金

  1. Consejo Nacional de Ciencia y Tecnologia (CONACYT)
  2. Helmholtz-Zentrum Berlin
  3. Helmholtz Young Investigator Program at Forschungszentrum Julich, Germany
  4. German Research Foundation (DFG) [SPP2196, GRK 2642]
  5. European Union [764787]
  6. Ministerio de Economia y Competitividad (MINECO) of Spain [ENE2017-85087-C3-1-R]
  7. Generalitat Valenciana [PROMETEO/2020/028]
  8. Spanish Ministry of Economy, Industry and Competitiveness [FJC2019-041835-I]

向作者/读者索取更多资源

Organic-inorganic hybrid halide perovskites, especially those with potassium ion incorporation, show improved morphology and enhanced photovoltaic performance, making them highly promising materials for solar cells.
Organic-inorganic hybrid halide perovskites are widely considered to be one the most promising material in photovoltaic technology, the use of this semiconductor as absorbent layer in solar cells has attracted considerable interest due to their excellent properties. It has been reported that the incorporation of potassium ion is a powerful strategy to tune the perovskites properties, notwithstanding there has been some disagreement regarding the role of this monovalent alkali metal within the perovskite structure. Here, we investigated the impact of K+ on the film properties and photovoltaic performance in double cation perovskite solar cells Cs(0.1)FA(0.9)PbI(3). Our results show that K+ intervenes in the crystallization process inducing the extraction of nonreactive PbI2 from the bulk, resulting in a notable enhancement in morphology and reduced non-radiative recombination. The solar cells fabricated with 3% of K+ content achieve a PCE of 19.3%, showing a significative improvement in Jsc, Voc and stability values compared with control devices.

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