Homogeneity of composition in evaporated Pb1-xGexTe thin films

B. Li; S. Y. Zhang; D. Q. Liu; F. S. Zhang

doi:10.1117/12.625042

17 October 2005 Homogeneity of composition in evaporated Pb_1-xGe_xTe thin films

B. Li, S. Y. Zhang, D. Q. Liu, F. S. Zhang

Proceedings Volume 5964, Detectors and Associated Signal Processing II; 596410 (2005) https://doi.org/10.1117/12.625042
Event: Optical Systems Design 2005, 2005, Jena, Germany

Abstract

PbTe based semiconductors are well-known narrow gap IV-VI compounds, which are of interest due to potential application in the fabrication of photo-detectors in the mid- and far infrared spectral range. Among them, Pb_l−xGe_xTe is known to have wider band gap than PbTe, which has been used to fabricate photo-detectors with shorter wavelength (λ<6.7 μm). However, the homogeneity of composition in evaporated Pb_l−xGe_xTe thin films directly from bulk alloys has not been investigated. In the paper, we report the investigation that the homogeneity of composition on the surface was studied using energy-dispersive X-ray analysis (EDAX), and the compositional depth profiles was investigated using Auger electron spectroscopy (AES) in combination with argon ion sputtering. ASE depth profiling and characterization of details in the Ge concentration gradient is demonstrated.

Citation Download Citation

B. Li, S. Y. Zhang, D. Q. Liu, and F. S. Zhang "Homogeneity of composition in evaporated Pb_1-xGe_xTe thin films", Proc. SPIE 5964, Detectors and Associated Signal Processing II, 596410 (17 October 2005); https://doi.org/10.1117/12.625042

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