Broadband Excited YAlO3:Cr3+, Er3+ Phosphors for Enhancing the Spectral Response of GaSb Solar Cell

Abstract

We report Er³⁺ emission in YAlO₃ host, sensitized by Cr³⁺. The excitation bands of Cr³⁺ at 416 and 555 nm are broad and effectively cover the region 400–600 nm. The phosphor can be useful for converting 400–600 nm radiations to infrared (IR) light around 1521 nm. This property can be useful for enhancing the spectral response of some solar cells such as GaSb to wavelengths below 600 nm down to 400 nm for which the photovoltaic conversion is poor.