Eu³⁺-Mn²⁺ dual-doped phosphate glasses have been prepared.

An efficient energy downshifting can occur from Eu³⁺ ions to Mn²⁺ ions.

Ultraviolet photons can be converted into visible-red photons.

The emission of glasses matched well with the spectral response of CdS/CdTe cells.

CdS/CdTe cells efficiency is effectively raised by covered with superstrate glass.