Optical and electrical study of CdZnTe surfaces passivated by KOH and NH4F solutions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10328935" target="_blank" >RIV/00216208:11320/16:10328935 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.apsusc.2016.08.103" target="_blank" >http://dx.doi.org/10.1016/j.apsusc.2016.08.103</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apsusc.2016.08.103" target="_blank" >10.1016/j.apsusc.2016.08.103</a>

Result language

angličtina

Original language name

Optical and electrical study of CdZnTe surfaces passivated by KOH and NH4F solutions

Original language description

Performance of CdZnTe-based detectors is highly related to surface preparation. Mechanical polishing, chemical etching and passivation are routinely employed for this purpose. However, the relation between these processes and the detector performance in terms of underlying physical phenomena has not been fully explained. The dynamics and properties of CdZnTe surface oxide layers, created by passivation with KOH and NH4F/H2O2 solutions, were studied by optical ellipsometry and X-ray photoelectron spectroscopy (XPS). Thicknesses and growth rates of the surface oxide layers differed for each of the passivation methods. Leakage currents which influence the final spectral resolution of the detector were measured simultaneously with ellipsometry. Results of both optical and electrical investigation showed the same trends in the time evolution and correlated to each other. NH4F/H2O2 passivation showed to be a method which produces the most desirable properties of the surface oxide layer.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

<a href="/en/project/GA15-05259S" target="_blank" >GA15-05259S: Surface passivation of CdTe/CdZnTe radiation detectors.</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Applied Surface Science

ISSN

0169-4332

e-ISSN

—

Volume of the periodical

389

Issue of the periodical within the volume

1

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

6

Pages from-to

1214-1219

UT code for WoS article

000384577600149

EID of the result in the Scopus database

2-s2.0-84983548238