Record efficiency! Perovskite single crystal photovoltaics based on self-cleaning surfaces

• Metal halide perovskite single crystals hold great promise in a variety of optoelectronic applications. As a common problem in solution-grown perovskite single crystals, surface contamination can adversely affect material properties and device performance.

  
  

  
  

  Chen Zhaolai and others from Shandong University learned from the self-cleaning effect of lotus leaves and introduced amphiphilic long-chain organic amines into the perovskite crystal growth solution to solve the surface pollution problem. The self-assembly of CTAC provides a hydrophobic crystal surface, inducing the spontaneous removal of residual growth solution, resulting in a clean surface and better optoelectronic performance of perovskite single crystals.

  
  

  
  

  The device achieved an efficiency of 23.4%, setting a new record for FA x MA 1-x PbI3  single crystal perovskite solar cells (PS C ). In addition, this strategy is also applicable to perovskite single crystals with different morphologies and compositions, which may contribute to the improvement of other single crystal perovskite optoelectronic devices.

  
  

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• Nianqiao Liu, et al, Perovskite Single Crystals with Self-Cleaning Surface for Efficient Photovoltaics, Angew. Chem. Int. Ed. 2024, e202314089

  
  

  DOI: 10.1002/anie.202314089

  
  

  https://doi.org/10.1002/anie.202314089