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The energy band structure with type-I alignment at the PbTe/CdTe(111) heterojunction interface is determined by the ultraviolet photoelectron spectrum using synchrotron radiation.The valence band and conduction band offsets are obtained to be 0.09±0.12 and 1.19±0.12 eV,respectively.These results are in agreement with theoretically predicted ones.The accurate determination of the valence band and conduction band offsets is useful for the fundamental understanding of the mid-infrared light emission from the PbTe/CdTe heterostructures and its application in devices.
The energy band structure with type-I alignment at the PbTe / CdTe (111) heterojunction interface is determined by the ultraviolet photoelectron spectrum using synchrotron radiation. The valence band and the conduction band offsets are obtained to 0.09 ± 0.12 and 1.19 ± 0.12 eV, respectively.These results are in agreement with theoretically predicted ones. The accurate determination of the valence band and conduction band offsets is useful for the fundamental understanding of the mid-infrared light emission from the PbTe / CdTe heterostructures and its application in devices.