Issue 6, 2022

Designing a novel Eu2+-doped hafnium-silicate phosphor for an energy-down-shift layer of CsPbI3 solar cells

Abstract

The excessive carbon discharge and low utilization efficiency of solar energy are still the biggest challenges in the world. A series of Eu2+ doped K2HfSiO5 phosphors were synthesized and applied in CsPbI3 perovskite solar cells. Under the excitation of ultraviolet and near ultraviolet light in the range of 300–450 nm, K2HfSiO5:Eu2+ exhibits emission in the visible range of 450–650 nm. Due to their strong absorption in the ultraviolet region and high quantum efficiency, K2HfSiO5:Eu2+ phosphors could be used to fabricate an energy-down-shift layer for solar cells. When spin-coated with the layer, the value of the short-circuit current of the packaged CsPbI3 solar cell increased, resulting in the enhancement of the power conversion efficiency by 2.19%. In addition, other basic properties of K2HfSiO5:Eu2+ phosphors such as photoluminescence, cathodoluminescence and stability have also been studied. All the results indicate that the energy-down-shift layer made using K2HfSiO5:Eu2+ phosphors has a positive effect on improving the performance of CsPbI3 perovskite solar cells.

Graphical abstract: Designing a novel Eu2+-doped hafnium-silicate phosphor for an energy-down-shift layer of CsPbI3 solar cells

Article information

Article type
Research Article
Submitted
25 Dec 2021
Accepted
19 Jan 2022
First published
21 Jan 2022

Mater. Chem. Front., 2022,6, 724-736

Designing a novel Eu2+-doped hafnium-silicate phosphor for an energy-down-shift layer of CsPbI3 solar cells

Y. Li, S. Wang and Y. Wang, Mater. Chem. Front., 2022, 6, 724 DOI: 10.1039/D1QM01655E

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