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Room temperature narrow gap semiconductor diodes as sources and detectors in the 5–10 μm wavelength region
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Ashley, T., Elliott, C.T., Gordon, N.T., Hall, Ralph, Johnson, A.D. and Pryce, G.J. (1996) Room temperature narrow gap semiconductor diodes as sources and detectors in the 5–10 μm wavelength region. Journal of Crystal Growth, 159 (1-4). pp. 1100-1103. doi:10.1016/0022-0248(95)00683-4 ISSN 0022-0248.
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Official URL: http://dx.doi.org/10.1016/0022-0248(95)00683-4
Abstract
Room temperature sources are required throughout the infrared region for many applications including gas sensing. We have demonstrated uncooled heterojunction light emitting diodes in MBE grown In1 − xAlxSb with peak wavelengths 5.5–5.8 μm. Fully impurity-doped MOVPE grown Hg1 − xCdxTe heterostructure diodes, with active regions of different compositions, emit over the entire spectral region from 5 to 10 μm. Both device types use electroluminescence in forward bias and negative luminescence (thermal equilibrium emission suppression) in reverse bias. In reverse bias carrier extraction and exclusion reduce carrier densities below equilibrium values, suppressing radiative and Auger generation. Hg1 − xCdxTe diode current-voltage characteristics show negative differential resistance at 295 K in reverse bias due to these effects. Similar structures are used for room temperature infrared detectors. Hg1 − xCdxTe detectors have been demonstrated as room temperature heterodyne CO2 laser detectors. In1 − xAlxSb diodes, although not exhibiting negative differential resistance at 295 K, have saturation current densities of 6 A cm−2, which are greatly improved with respect to uncooled InSb homostructure diodes and lead to improved detector performance.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Journal of Crystal Growth | ||||
Publisher: | Elsevier | ||||
ISSN: | 0022-0248 | ||||
Official Date: | February 1996 | ||||
Dates: |
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Volume: | 159 | ||||
Number: | 1-4 | ||||
Page Range: | pp. 1100-1103 | ||||
DOI: | 10.1016/0022-0248(95)00683-4 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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