A near IR GaP/Ga(1-x)InxP/Ga0.47In0.53As (x:01) photocathode with 0.7-1.65 photoresponse is proposed and designed. The photoemission of the GaP/Ga(1-x)InxP/Ga0.47In0.53As is calculated and eompared with the photoemission of the GaAs photocathode (0.4-0.9m) under night sky (full moon and clear star) irradiation.
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