Ptype GaAs substrate znse series pin photo diode and ptype GaAs substrate znse series avalanche photodiode

The present invention provides a blue - purple - near-ultraviolet light sensitive, low dark current, high reliability of the ZnSe-based photodiode, a p-type GaAs single crystal substrate; epitaxially grown on the p-type GaAs single-crystal substrate by repeating stacked p-type ZnSe and p-type ZnTe is continuously changed so that the band gap of superlattice; superlattice epitaxially grown on a p-type Zn