Nano Letters: Controlled colloidal synthesis of perovskite nanocrystals for dual-mode optoelectronic applications

• Nanosized colloidal perovskite nanocrystals (PNCs) have attracted increasing research interest due to their narrow emission bandwidth, high photoluminescence quantum yield (PLQY), and high defect tolerance.
  

• Recently, Yuan Jianyu of Suzhou University and Qian Zhao of Nankai University demonstrated an acetate ligand (AcO−)-assisted strategy for the controllable and tunable synthesis of colloidal methyl lead iodide (MAPbI3) perovskite nanocrystals. (PNC) to enable efficient photovoltaic and photodetector devices.

  
  

  The size of colloidal MAPbI3 PNCs can be tuned from 9 to 20 nm by changing the AcO−/MA ratio in the reaction precursor. In situ observations and detailed characterization results indicate that the incorporation of AcO− ligand alters the formation of PbI6 octahedral cages, thereby controlling the growth of PNCs.
  

  
  

  The fully optimized AcO−/MA ratio enables MAPbI3 PNCs with low defect density, long carrier lifetime, and unique solid-state isotropic properties, which can be used to fabricate solution-processed dual-mode photovoltaic and photodetector devices with a conversion efficiency of 13.34%. and detection rate are 2 × 1011 Jones respectively. This study provides a pathway for further precise and controllable synthesis of hybrid PNCs for multifunctional optoelectronic applications.

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• Hehe Huang, et al, Controllable Colloidal Synthesis of MAPbI3 Perovskite Nanocrystals for Dual-Mode Optoelectronic Applications, Nano Lett., 2023

  
  

  DOI: 10.1021/acs.nanolett.3c03354

  
  

  https://doi.org/10.1021/acs.nanolett.3c03354