Uncooled silicon germanium oxide (Si[sub]x[/sub]Ge[sub]y[/sub]O[sub]1-x-y[/sub]) thin films for infrared detection

M. L. Hai; M. Hesan; J. Lin; Q. Cheng; M. Jalal; A. J. Syllaios; S. Ajmera; M. Almasri

doi:10.1117/12.919708

31 May 2012 Uncooled silicon germanium oxide (Si_xGe_yO_1-x-y) thin films for infrared detection

M. L. Hai, M. Hesan, J. Lin, Q. Cheng, M. Jalal, A. J. Syllaios, S. Ajmera, M. Almasri

Proceedings Volume 8353, Infrared Technology and Applications XXXVIII; 835317 (2012) https://doi.org/10.1117/12.919708
Event: SPIE Defense, Security, and Sensing, 2012, Baltimore, Maryland, United States

Abstract

This paper presents a detailed characterization of silicon germanium oxide (Si_xGe_yO_1-x-y) thin films with an Oxygen concentration below 10%. The results demonstrated that a high TCR and a low corresponding resistivity can be achieved using various compositions, for example, Si_0.054Ge_0.877O_0.069 film has achieved a TCR and a resistivity of -3.516/K, and 629 Ω-cm, respectively. The lowest measured resistivity and the corresponding TCR were 119.6 Ω-cm and -2.202 %/K respectively, using Si_0.136Ge_0.838O_0.026 for film deposited at room temperature, whereas the highest achieved TCR and the corresponding resistivity at room temperature were -5.017 %/K, and 39.1×103 Ω-cm, respectively, using Si_0.167Ge_0.762O_0.071 for films deposited at room temperature. The calculated activation energy (E_a) from the slope of Arrhenius plots were varied between 0.1232 eV to 0.3788 eV. The X-ray diffraction study demonstrated that the films are amorphous but did not show any dependence on varying silicon at fixed oxygen concentration. The noise study demonstrated that these films exhibit relatively high 1/f.

Citation Download Citation

M. L. Hai, M. Hesan, J. Lin, Q. Cheng, M. Jalal, A. J. Syllaios, S. Ajmera, and M. Almasri "Uncooled silicon germanium oxide (Si_xGe_yO_1-x-y) thin films for infrared detection", Proc. SPIE 8353, Infrared Technology and Applications XXXVIII, 835317 (31 May 2012); https://doi.org/10.1117/12.919708

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