LeadFree Ultra-Wide Direct Bandgap Perovskite EACaI3

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Abstract

Recently, perovskite-based light-emitting devices (LEDs) have been invested with near-infrared, red, green, and blue emissions. And, short-wavelength perovskite LEDs targeted at violet emission remain a significant challenge. Moreover, the majority of previously reported devices were focused on the lead-containing halide perovskites. In this research, for the first time, EACaI3 (270 nm) was proposed as ultraviolet-C potential lead-free perovskite material with direct ultra-wide bandgap property with 0.03% imaginary part of phonon density of state. The perovskite EACaI3 has dynamic stability and could be used for devices demonstrated with excellent working stability. These results suggest that the lead-free EACaI3 are potentially attractive candidates for preparing environment-friendly and stable ultra-wide band gap device.

Original languageEnglish
Pages (from-to)66-70
Number of pages5
JournalIEEE Transactions on Nanotechnology
Volume21
DOIs
StatePublished - 2022

Keywords

  • lead-free
  • Perovskite
  • ultra-wide band gap device
  • ultraviolet-C

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