Abstract

Single-crystal samples of n-type Cd_0.95Mn_0.05Se, grown a modified Bridgman method¹, have been used as electrodes in photoelectrochemical cells (PEC’s) employing aqueous diselenide electrolyte. After etching with HCl/HNO₃ (1:1 v/v), the samples exhibit photoluminescence (PL) when excited with ultraband gap excitation (E_g~1.75 eV²); the maximum of the PL band, ~690 nm, is near the band gap energy and blue shifts to ~680 nm at 77 K. In some samples, subband gap PL is also observed (uncorrected λ_max~890 nm.) The radiative efficiency, ϕ_r, of the edge emission can be as large as ~10^-4 at 295 K and ~10^-2 at 77 K.

© 1984 Optical Society of America