Noise Sources in the CdTe radiation tetectors
Result description
Noise and transport characteristics of CdTe gamma - and X-ray detectors have been carried out to determine the 1/f noise sources and theirs correlation with charge carriers mobility. The noise spectral density was measured by standard set-up. The noise of low ohmic samples has 1/f noise spectral density which increases with the square of voltage. The high ohmic samples revile 1/fa type noise in low frequency range and G-R noise in frequency above 100 Hz. In low frequency range noise spectral is proportional to fourth power of current and then we suppose that main source of noise is in Schottky barrier in vicinity of contacts. We suppose that thickness of the region with dominant contribution to noise decreases with increasing current and total reciprocal number of curriers is proportional to second power of current. Then current noise spectral density is proportional to fourth power of current.
Keywords
Noise1/f noisecontact noisemobility fluctuationGR spectraSchottky barrier
The result's identifiers
Result code in IS VaVaI
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Noise Sources in the CdTe radiation tetectors
Original language description
Noise and transport characteristics of CdTe gamma - and X-ray detectors have been carried out to determine the 1/f noise sources and theirs correlation with charge carriers mobility. The noise spectral density was measured by standard set-up. The noise of low ohmic samples has 1/f noise spectral density which increases with the square of voltage. The high ohmic samples revile 1/fa type noise in low frequency range and G-R noise in frequency above 100 Hz. In low frequency range noise spectral is proportional to fourth power of current and then we suppose that main source of noise is in Schottky barrier in vicinity of contacts. We suppose that thickness of the region with dominant contribution to noise decreases with increasing current and total reciprocal number of curriers is proportional to second power of current. Then current noise spectral density is proportional to fourth power of current.
Czech name
Zdroje šumu v detektorech CdTe
Czech description
Zdroje šumu a transport nosičů v detektorech záření na bázi CdTe
Classification
Type
D - Article in proceedings
CEP classification
JA - Electronics and optoelectronics
OECD FORD branch
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Result continuities
Project
GA102/07/0113: Noise as Diagnostic Tool for Schottky and Could Electron Emission Cathodes
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2007
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Noise and Fluctuation - 19-th International Conference on Noise and Fluctuations - ICNF 2007
ISBN
978-0-7354-0432-8
ISSN
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e-ISSN
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Number of pages
4
Pages from-to
302-305
Publisher name
American Institute of Physics
Place of publication
Tokyo
Event location
Tokyo
Event date
Sep 9, 2007
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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Result type
D - Article in proceedings
CEP
JA - Electronics and optoelectronics
Year of implementation
2007