About: Photoconductivity Mapping of Semi-Insulating CdZnTe

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Semi-insulating CdZnTe crystals were studied by photoconductivity mapping using both the contactless method and measurement with evaporated Au contacts. We evaluated the distribution of space charge analyzing the slope of lux-ampere characteristics. Mobility/lifetime product maps were extracted fitting the Hecht relation to voltampere characteristics measured with a weak light at wavelength 750 nm. Correlation analysis of contactless resistivity and photoconductivity maps shows, that both these parameters are anticorrelated. This fact can be explained by a shift of Fermi level changing the average occupation of a midgap level. A decrease of occupation with an increasing resistivity results in an increase of electron trapping and decreased photoconductivity. This explanation is supported by simulating the dependence of the photocurrent on the Fermi level position near the midgap using parameters of midgap levels assumed in state-of-the art radiation detectors. Semi-insulating CdZnTe crystals were studied by photoconductivity mapping using both the contactless method and measurement with evaporated Au contacts. We evaluated the distribution of space charge analyzing the slope of lux-ampere characteristics. Mobility/lifetime product maps were extracted fitting the Hecht relation to voltampere characteristics measured with a weak light at wavelength 750 nm. Correlation analysis of contactless resistivity and photoconductivity maps shows, that both these parameters are anticorrelated. This fact can be explained by a shift of Fermi level changing the average occupation of a midgap level. A decrease of occupation with an increasing resistivity results in an increase of electron trapping and decreased photoconductivity. This explanation is supported by simulating the dependence of the photocurrent on the Fermi level position near the midgap using parameters of midgap levels assumed in state-of-the art radiation detectors. (en)
Title	Photoconductivity Mapping of Semi-Insulating CdZnTe Photoconductivity Mapping of Semi-Insulating CdZnTe (en)
skos:prefLabel	Photoconductivity Mapping of Semi-Insulating CdZnTe Photoconductivity Mapping of Semi-Insulating CdZnTe (en)
skos:notation	RIV/00216208:11320/11:10100828!RIV12-GA0-11320___
http://linked.open...avai/riv/aktivita	P S Z
http://linked.open...avai/riv/aktivity	P(GAP102/10/0148), S, Z(MSM0021620834)
http://linked.open...iv/cisloPeriodika	4
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Grill, Roman Belas, Eduard Höschl, Pavel Moravec, Pavel Franc, Jan Dědič, Václav Kubát, Jan
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Matematicko-fyzikální fakulta
http://linked.open...dnocenehoVysledku	220239
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/11:10100828
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	CdZnTe; Semi-Insulating; Mapping; Photoconductivity (en)
http://linked.open.../riv/klicoveSlovo	CdZnTe Photoconductivity Semi-Insulating Mapping
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[8FBBF747FF36]
http://linked.open...i/riv/nazevZdroje	IEEE Transactions on Nuclear Science
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	7 (xsd:int)
http://linked.open...cetTvurcuVysledku	8 (xsd:int)
http://linked.open...vavai/riv/projekt	Influence of Te inclusions on performance of CdTe and CdZnTe radiation detectors
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	58
http://linked.open...iv/tvurceVysledku	Belas, Eduard Franc, Jan Grill, Roman Höschl, Pavel Moravec, Pavel Dědič, Václav Kubát, Jan Babentsov, Volodymyr
http://linked.open...ain/vavai/riv/wos	000293977200010
http://linked.open...n/vavai/riv/zamer	Condensed Matter Physics – New Materials and Technologies
issn	0018-9499
number of pages	8 (xsd:int)
http://bibframe.org/vocab/doi	10.1109/TNS.2011.2147333
http://localhost/t...ganizacniJednotka	11320

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