InxGa1−xAsyP1−y/InP heterojunction photodiodes

Abstract
The photoelectronic properties of quaternary alloy heterojunction photodiodes made of liquid‐phase‐grown In0.88Ga0.12As0.25P0.75 layers deposited onto p‐doped InP substrates have been investigated experimentally and analytically. It is shown that a typical photodiode with a peak responsivity of 0.26 A/W (at 1.02 μm) has a quantum efficiency of ∼22% at 1.06 μm.