Nanoscale Research Letters (Aug 2018)

A New Up-conversion Material of Ho3+-Yb3+-Mg2+ Tri-doped TiO2 and Its Applications to Perovskite Solar Cells

  • Zhenlong Zhang,
  • Danna Li,
  • Wenjia Shi,
  • Yanyan Liu,
  • Yan Zhang,
  • Yuefeng Liu,
  • Huiping Gao,
  • Yanli Mao

DOI
https://doi.org/10.1186/s11671-018-2681-4
Journal volume & issue
Vol. 13, no. 1
pp. 1 – 8

Abstract

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Abstract A new up-conversion nanomaterial of Ho3+-Yb3+-Mg2+ tri-doped TiO2 (UC-Mg-TiO2) was designed and synthesized with a sol-gel method. The UC-Mg-TiO2 presented enhanced up-conversion fluorescence by an addition of Mg2+. The UC-Mg-TiO2 was utilized to fabricate perovskite solar cells by forming a thin layer on the electron transfer layer. The results display that the power conversion efficiency of the solar cells based on the electron transfer layer with UC-Mg-TiO2 is improved to 16.3 from 15.2% for those without UC-Mg-TiO2. It is demonstrated that the synthesized UC-Mg-TiO2 can convert the near-infrared light to visible light that perovskite film can absorb to improve the power conversion efficiency of the devices.

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