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Proceedings Paper

Design of materials for IR detectors using high Z elements for high energy radiation environment
Author(s): Sonali Saraf; Christopher Cooper; Ching Hua Su; Fow-Sen Choa; Bradley Arnold; Brian Cullum; David Sachs; Philip DiPaula ; N. B. Singh
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Paper Abstract

There is a strong need for rad hard and high operating temperature IR detectors for space environment. Heavy metal Selenides (high Z and large density) have been investigated for more than half century for high operating temperature mid wave infrared (MWIR) applications. Most of the efforts have been devoted to make detector arrays on high-resistivity Si substrates for operating wavelengths in the 1.5 to 5.0 μm region using physical vapor transport grown poly crystalline materials. For most of the biological spectral and imaging applications, short wave infrared (SWIR) detectors have shown better performance. Recent growth materials have shown variation in morphology with slight change in growth conditions and hence variation in performance parameters such as bandgap, mobility and resistivity from sample to sample. We have performed growth and optical characterization of binary materials CdSe-PbSe to determine the suitability for IR detector. We have determined bandgap using several theoretical models for different morphologies observed during growth on silicon wafers.

Paper Details

Date Published: 13 May 2019
PDF: 7 pages
Proc. SPIE 10980, Image Sensing Technologies: Materials, Devices, Systems, and Applications VI, 109801A (13 May 2019); doi: 10.1117/12.2516048
Show Author Affiliations
Sonali Saraf, Univ. of Maryland, Baltimore County (United States)
Christopher Cooper, Univ. of Maryland, Baltimore County (United States)
Ching Hua Su, NASA Marshall Space Flight Ctr. (United States)
Fow-Sen Choa, Univ. of Maryland, Baltimore County (United States)
Bradley Arnold, Univ. of Maryland, Baltimore County (United States)
Brian Cullum, Univ. of Maryland, Baltimore County (United States)
David Sachs, Univ. of Maryland, Baltimore County (United States)
Philip DiPaula , Univ. of Maryland, Baltimore County (United States)
N. B. Singh, Univ. of Maryland, Baltimore County (United States)


Published in SPIE Proceedings Vol. 10980:
Image Sensing Technologies: Materials, Devices, Systems, and Applications VI
Nibir K. Dhar; Achyut K. Dutta; Sachidananda R. Babu, Editor(s)

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