Nature Communications (Nov 2022)

Towards highly efficient NIR II response up-conversion phosphor enabled by long lifetimes of Er3+

  • Xiumei Yin,
  • Wen Xu,
  • Ge Zhu,
  • Yanan Ji,
  • Qi Xiao,
  • Xinyao Dong,
  • Ming He,
  • Baosheng Cao,
  • Na Zhou,
  • Xixian Luo,
  • Lin Guo,
  • Dong Bin

DOI
https://doi.org/10.1038/s41467-022-34350-1
Journal volume & issue
Vol. 13, no. 1
pp. 1 – 10

Abstract

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Development of efficient upconversion (UC) phosphors that emit under irradiation in the NIR II region is challenging - most UC materials rely on the presence of sensitizers absorbing at shorter wavelengths. Here, authors synthesize Er3+ doped ternary sulfides phosphors with visible UC efficiency up to 2.6% and long emission lifetimes under 1532 nm irradiation, via an excited state absorption mechanism.