Journal
NANOSCALE RESEARCH LETTERS
Volume 13, Issue -, Pages -Publisher
SPRINGEROPEN
DOI: 10.1186/s11671-018-2545-y
Keywords
Enhanced power conversion efficiency; Perovskite solar cells; Up-conversion material
Funding
- NSFC-Henan Province Joint Fund [U1604144]
- Science Fund of Henan Province [162300410020]
- Science Project of Education Department of Henan Province [17A140005]
- Science and Technology Development Project of Henan Province [172102410043]
- Program for Science and Technology Innovation Talents in Universities of Henan Province [16HASTIT043]
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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 Er-3(+)-Yb-3(+) 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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