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Energy band alignment of PbTe/CdTe(111) interface determined by ultraviolet photoelectron spectra using synchrotron radiation |
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| Authors: | Cai Chun-Feng Wu Hui-Zhen Si Jian-Xiao Jin Shu-Qiang Zhang Wen-Hu Xu Yang and Zhu Jun-Fa |
| Institution: | Department of Physics, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China; College of Physics and Mathematics, Zhejiang Normal University, Jinhua 321004, China; National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China |
| Abstract: | 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. |
| Keywords: | valence band offset ultraviolet photoelectron spectra synchrotron radiation |
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