Nanoscale Research Letters (May 2018)

Enhanced Power Conversion Efficiency of Perovskite Solar Cells with an Up-Conversion Material of Er3+-Yb3+-Li+ Tri-doped TiO2

  • Zhenlong Zhang,
  • Jianqiang Qin,
  • Wenjia Shi,
  • Yanyan Liu,
  • Yan Zhang,
  • Yuefeng Liu,
  • Huiping Gao,
  • Yanli Mao

DOI
https://doi.org/10.1186/s11671-018-2545-y
Journal volume & issue
Vol. 13, no. 1
pp. 1 – 8

Abstract

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Abstract In this paper, Er3+-Yb3+-Li+ tri-doped TiO2 (UC-TiO2) was prepared by an addition of Li+ to Er3+-Yb3+ co-doped TiO2. The UC-TiO2 presented an enhanced up-conversion emission compared with Er3+-Yb3+ co-doped TiO2. The UC-TiO2 was applied to the perovskite solar cells. The power conversion efficiency (PCE) of the solar cells without UC-TiO2 was 14.0%, while the PCE of the solar cells with UC-TiO2 was increased to 16.5%, which presented an increase of 19%. The results suggested that UC-TiO2 is an effective up-conversion material. And this study provided a route to expand the spectral absorption of perovskite solar cells from visible light to near-infrared using up-conversion materials.

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