Lead-free cesium tin halide nanocrystals for light-emitting diodes and color down conversion

K. P.O. Mahesh, Che Yu Chang, Wei Li Hong, Tzu Hsiang Wen, Pei Hsuan Lo, Hao Zhe Chiu, Ching Ling Hsu, Sheng Fu Horng, Yu Chiang Chao

研究成果: 雜誌貢獻期刊論文同行評審

1 引文 斯高帕斯(Scopus)

摘要

Organometal halide perovskites are attracting a great deal of attention because of their long carrier diffusion lengths, wide wavelength tunability, and narrow-band emission. However, the toxicity of lead has caused considerable environmental and health concerns. In this work, lead-free cesium tin halide nanocrystals are synthesized and investigated. CsSnBr3and CsSnI3nanocrystals, 25 and 7 nm in size, are synthesized by a facile hot injection method. Absorption spectroscopy, photoluminescence spectroscopy, and X-ray diffraction were used to understand their structural and optical properties. CsSnBr3and CsSnI3nanocrystals show emission peaks at 683 and 938 nm, respectively. These nanocrystals show shelf stability for a few months. Temperature-dependent photoluminescence is utilized to know more about fundamental physical parameters, such as exciton binding energy, charge carrier-phonon interactions and band gap. Light-emitting diodes and color down-conversion films are also demonstrated using these lead free perovskite nanocrystals.

原文英語
頁(從 - 到)37161-37167
頁數7
期刊RSC Advances
10
發行號61
DOIs
出版狀態已發佈 - 2020 十月 7

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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