APL Materials (May 2020)

All-vacuum-deposited inorganic cesium lead halide perovskite light-emitting diodes

  • Sihan Xie,
  • Anna Osherov,
  • Vladimir Bulović

DOI
https://doi.org/10.1063/1.5144103
Journal volume & issue
Vol. 8, no. 5
pp. 051113 – 051113-6

Abstract

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Polycrystalline CsPbBr3 thin films are deposited by vacuum co-evaporation of cesium halide and lead halide precursors, leading to uniform pinhole-free morphology and precise control over the film thickness and precursor stoichiometry. By utilizing the organic hole and electron transport layers, all-vacuum-deposited perovskite LEDs are fabricated. The resulting devices exhibit a maximum luminance of 1800 cd/m2, a 531 nm emission wavelength peak with a spectral linewidth of 21 nm, and an external quantum efficiency of 1.1%.