About: Effect of contact preparation on the profile of the electric field in CdZnTe detectors

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About: Effect of contact preparation on the profile of the electric field in CdZnTe detectors Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1088/0022-3727/46/39/395102
Description	We used the transient-current technique to delineate the effects of different contact metals on the formation of space charge and on the profiles of the electric field in CdZnTe radiation detectors. In contrast to existing results on the polarization of semiconductor radiation detectors, we find that detectors with ohmic (Au/Au) contacts may experience a larger distortion of the internal electric field than those having Schottky (Au/In) contacts. We explain this difference by postulating the presence of a deep hole trap (E_T) below the Fermi energy (E_F), which captures holes generated by the weakly injecting Au anode. The observed behaviour was described successfully by a numerical model relating the energy difference between E_T and E_F and the band bending at the contacts. We also present results on aging effects that limit the detector's performance and stability over long times. We used the transient-current technique to delineate the effects of different contact metals on the formation of space charge and on the profiles of the electric field in CdZnTe radiation detectors. In contrast to existing results on the polarization of semiconductor radiation detectors, we find that detectors with ohmic (Au/Au) contacts may experience a larger distortion of the internal electric field than those having Schottky (Au/In) contacts. We explain this difference by postulating the presence of a deep hole trap (E_T) below the Fermi energy (E_F), which captures holes generated by the weakly injecting Au anode. The observed behaviour was described successfully by a numerical model relating the energy difference between E_T and E_F and the band bending at the contacts. We also present results on aging effects that limit the detector's performance and stability over long times. (en)
Title	Effect of contact preparation on the profile of the electric field in CdZnTe detectors Effect of contact preparation on the profile of the electric field in CdZnTe detectors (en)
skos:prefLabel	Effect of contact preparation on the profile of the electric field in CdZnTe detectors Effect of contact preparation on the profile of the electric field in CdZnTe detectors (en)
skos:notation	RIV/00216208:11320/13:10190133!RIV14-TA0-11320___
http://linked.open...avai/riv/aktivita	P S
http://linked.open...avai/riv/aktivity	P(GA13-13671S), P(TE01020445), S
http://linked.open...iv/cisloPeriodika	39
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Praus, Petr Grill, Roman Belas, Eduard Uxa, Štěpán
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	71429
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/13:10190133
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	gap; gamma; energy; polarization; cdte; space-charge; nuclear-detectors; charge collection; radiation detectors; transient-current technique (en)
http://linked.open.../riv/klicoveSlovo	space-charge cdte nuclear-detectors radiation detectors gamma gap energy polarization charge collection transient-current technique
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[3FCBD6EF732C]
http://linked.open...i/riv/nazevZdroje	Journal of Physics D - Applied Physics
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	X-ray detectors for high photon fluxes Radiation and nuclear safety technologies development center: RANUS - TD
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	46
http://linked.open...iv/tvurceVysledku	Belas, Eduard Grill, Roman Praus, Petr Uxa, Štěpán James, R. B.
http://linked.open...ain/vavai/riv/wos	000324810400004
issn	0022-3727
number of pages	6 (xsd:int)
http://bibframe.org/vocab/doi	10.1088/0022-3727/46/39/395102
http://localhost/t...ganizacniJednotka	11320

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