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Effect of energy storage of long persistent SrAl2O4:(Eu2+, Dy3+) phosphors on solar cell performance

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  • Zhu, Ruiqi
  • Lou, Chaogang
  • Song, Guoxiang
  • Shen, Bowen

Abstract

The effect of energy storage of long persistent luminescent phosphors SrAl2O4 doped with Eu2+ and Dy3+ on solar cell performance is investigated. These phosphors are capable of storing electrons in trap energy levels and have accelerated green emission when subjected to thermal disturbances. The experiment shows that 430 nm is the optimal wavelength that effectively stores energy. The external quantum efficiency is improved by introducing background light to pre-store the energy, resulting in an overall improvement across the wavelength range of 350–1100 nm. Under continuous illumination for 10 min, the packaged cells with the phosphors present a reduction in operating temperature of 3.7 °C, compared to the bare cells, along with enhanced performance: the absolute increases in conversion efficiency, open-circuit voltage, and short-circuit current density of up to 0.681 %, 0.005 V, and 0.83 mA/cm2, respectively.

Suggested Citation

  • Zhu, Ruiqi & Lou, Chaogang & Song, Guoxiang & Shen, Bowen, 2026. "Effect of energy storage of long persistent SrAl2O4:(Eu2+, Dy3+) phosphors on solar cell performance," Renewable Energy, Elsevier, vol. 259(C).
    • Handle: RePEc:eee:renene:v:259:y:2026:i:c:s0960148125027661
    DOI: 10.1016/j.renene.2025.125102
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