Enhanced conversion efficiency of crystalline Si solar cells via luminescent down-shifting using Ba2SiO4 : Eu2+ phosphor
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The colloidal submicron needle-like Ba2SiO4 : Eu2+ phosphor coated on microtextured silicon surface has been used as a luminescent down-shifting (LDS) material for enhancing the power conversion efficiency of solar cells. Under a simulated onesun illumination, upon phosphor coating the solar cells showed an enhancement of the short-circuit current density (Jsc) increased from 34.00 to 34.48 mA/cm2 , meanwhile the power conversion efficiency (PCE) was enhanced from 15.13% to 15.36%. The related underlying mechanism for these enhancements can be attributed to photon down-shifting and light scattering effect through the investigation of PLE spectrum, reflectance, and external quantum efficiency. Our results indicate that the colloidal submicron needle-like Ba2SiO4 : Eu2+ phosphor not only act as LDS centers in the UV region but also serve as an antireflection coating for enhancing the light absorption in the visible regime.
Abstract
The colloidal submicron needle-like Ba2SiO4 : Eu2+ phosphor coated on microtextured silicon surface has been used as a luminescent down-shifting (LDS) material for enhancing the power conversion efficiency of solar cells. Under a simulated onesun illumination, upon phosphor coating the solar cells showed an enhancement of the short-circuit current density (Jsc) increased from 34.00 to 34.48 mA/cm2 , meanwhile the power conversion efficiency (PCE) was enhanced from 15.13% to 15.36%. The related underlying mechanism for these enhancements can be attributed to photon down-shifting and light scattering effect through the investigation of PLE spectrum, reflectance, and external quantum efficiency. Our results indicate that the colloidal submicron needle-like Ba2SiO4 : Eu2+ phosphor not only act as LDS centers in the UV region but also serve as an antireflection coating for enhancing the light absorption in the visible regime.
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