Novel Sb-based alloy for uncooled infrared photodetector applications

Manijeh Razeghi

doi:10.1117/12.429414

12 June 2001 Novel Sb-based alloy for uncooled infrared photodetector applications

Manijeh Razeghi

Proceedings Volume 4288, Photodetectors: Materials and Devices VI; (2001) https://doi.org/10.1117/12.429414
Event: Symposium on Integrated Optics, 2001, San Jose, CA, United States

Abstract

We report on the growth and characterization of InSbBi, InTlSb, InTlP, and the quaternary alloys for uncooled long- wavelength infrared photodetector applications. The layers were grown on InSb and GaAs substrates by low-pressure metalorganic chemical vapor deposition. The incorporation of Bi and Tl in InSb was investigated with high-resolution x- ray diffraction, energy dispersive x-ray analysis, and optical photoresponse measurements. We also demonstrate the photodetectors fabricated from the grown InSbBi and InTlSb alloys. InSb_0.96Bi_0.04 photoconductive detectors exhibited a responsivity of 3.2 V/W at 77 K. The estimated Johnson noise limited detectivity at 7 micrometers was 1.7 X 10⁸ cmHz^1/2/W at 77 K. A room temperature operating InSb_0.95Bi_0.05 photodetector was also demonstrated. Photoresponse up to 12 micrometers was achieved at 300 K. The responsivity and Johnson noise-limited detectivity at 10.6 micrometers were 1.9 mV/W and 1.2 X 10⁶ cmHz^1/2/W, respectively. Photoresponse up to 15 micrometers was achieved at 300 K from quaternary InTlAsSb and InBiAsSb alloys.

Citation Download Citation

Manijeh Razeghi "Novel Sb-based alloy for uncooled infrared photodetector applications", Proc. SPIE 4288, Photodetectors: Materials and Devices VI, (12 June 2001); https://doi.org/10.1117/12.429414

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