Energy band alignment of PbTe/CdTe(111) interface determined by ultraviolet photoelectron spectra using synchrotron radiation

doi:10.1088/1674-1056/19/7/077301

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

Revised: 16 December 2009
Accepted manuscript online:

PACS:	71.20.Nr	(Semiconductor compounds)
	73.40.Lq	(Other semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions)
	79.60.Bm	(Clean metal, semiconductor, and insulator surfaces)
	79.60.Jv	(Interfaces; heterostructures; nanostructures)
	78.67.De	(Quantum wells)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10974174 and 60676003).

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Cai Chun-Feng(蔡春锋), Wu Hui-Zhen(吴惠桢), Si Jian-Xiao(斯剑霄), Jin Shu-Qiang(金树强), Zhang Wen-Hua(张文华), Xu Yang(许杨), and Zhu Jun-Fa(朱骏发) Energy band alignment of PbTe/CdTe(111) interface determined by ultraviolet photoelectron spectra using synchrotron radiation 2010 Chin. Phys. B 19 077301

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Energy band alignment of PbTe/CdTe(111) interface determined by ultraviolet photoelectron spectra using synchrotron radiation

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