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Open Access Publications from the University of California

Lead-free Cesium Europium Halide Perovskite Nanocrystals.

  • Author(s): Huang, Jianmei
  • Lei, Teng
  • Siron, Martin
  • Zhang, Ye
  • Yu, Sunmoon
  • Seeler, Fabian
  • Dehestani, Ahmad
  • Quan, Li Na
  • Schierle-Arndt, Kerstin
  • Yang, Peidong
  • et al.
Abstract

Because of the toxicity of lead, searching for a lead-free halide perovskite semiconducting material with comparable optical and electronic properties is of great interest. Rare-earth-based halide perovskite represents a promising class of materials for this purpose. In this work, we demonstrate the solution-phase synthesis of single-crystalline CsEuCl3 nanocrystals with a uniform size distribution centered around 15 nm. The CsEuCl3 nanocrystals have photoluminescence emission centered at 435 nm, with a full width at half-maximum of 19 nm. Furthermore, CsEuCl3 nanocrystals can be embedded in a polymer matrix that provides enhanced stability under continuous laser irradiation. Lead-free rare-earth cesium europium halide perovskite nanocrystals represent a promising candidate to replace lead halide perovskites.

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