Self-cleaning perovskite single crystal prepared from ionic liquids enables high-performance light detection

• Surface defects are crucial for perovskite single crystals (SCs) in multifunctional optoelectronic applications, however, they suffer from complex post-processing and unsatisfactory reproducibility due to residual solvent corrosion and adsorbed precursor deposition in solution growth strategies. Repetitive issues.

  
  

  
  

  Based on this, Jian Sun and Yu Chen of Beijing Institute of Technology demonstrated an ionic liquid, 1-butyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide (BMITFSI), assisted solution growth method for Preparation of high-quality self-cleaning perovskite single crystals without any post-processing. Due to the in-situ assembly on the crystal plane, BMITFSI can effectively reduce the crystallographic trap density by simultaneously introducing a self-cleaning effect and optimizing the crystal growth process.

  
  

  
  

  The prepared MAPbI3 single crystal exhibits impressive photodetection performance in the visible-infrared spectrum, with a specific detection of 2.83 × 1012 Jones, and 7.24 × 104 µC Gyair −1 cm −2 in X-ray detection The sensitivity is as good as conventionally prepared crystals that require careful post-processing. Based on the universality of chemical composition independence, this work paves a simple but effective way to improve current crystallization methods toward the preparation of high-quality perovskite SCs.

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• A. Gao. et al.  Self-Cleaning Perovskite Single Crystals Fabricated with Bis(trifluoromethylsulfonyl)imide Derived Ionic Liquid Toward High-Performance Photodetection. Adv. Funct. Mater. 2024, 2314237.

  
  

  DOI: 10.1002/adfm.202314237

  
  

  https://doi.org/10.1002/adfm.202314237