DocumentCode
1345230
Title
Investigation of electrical contacts for Cd1-xZnx Te nuclear radiation detector
Author
Burger, A. ; Chen, H. ; Tong, J. ; Shi, D. ; George, M.A. ; Chen, K.T. ; Collins, W.E. ; James, R.B. ; Stahle, C.M. ; Bartlett, L.M.
Author_Institution
Dept. of Phys., Fisk Univ., Nashville, TN, USA
Volume
44
Issue
3
fYear
1997
fDate
6/1/1997 12:00:00 AM
Firstpage
934
Lastpage
938
Abstract
A comparative study of four different metal deposition methods on detector grade Cd1-xZnxTe crystal has been done using current-voltage (I-V) characterization and 133Ba gamma spectroscopy. An electroless Au contact and thermal evaporated Au contact have been found to yield a smaller leakage current and a more linear/symmetric I-V curve than that of sputtered Pt and Au contact. An optimum detector performance can be achieved by combining the thermal evaporated Au deposition method with a chemical surface treatment consisting of 5% Br MeOH followed by 2% Br-20% lactic acid in ethylene glycol. Low temperature photoluminescence spectra of Cd1-xZn xTe samples corresponding to these different metallization schemes are also presented and discussed
Keywords
II-VI semiconductors; cadmium compounds; electrical contacts; gamma-ray detection; gamma-ray spectrometers; photoluminescence; semiconductor counters; semiconductor device metallisation; surface treatment; zinc compounds; 133Ba gamma spectroscopy; Cd1-xZnxTe nuclear radiation detector; CdZnTe-Ag; chemical surface treatment; current-voltage characteristics; electrical contact; electroless contact; leakage current; metal deposition; metallization; photoluminescence spectrum; sputtered contact; thermal evaporated contact; Chemicals; Contacts; Gamma ray detection; Gamma ray detectors; Gold; Leakage current; Spectroscopy; Surface treatment; Tellurium; Zinc;
fLanguage
English
Journal_Title
Nuclear Science, IEEE Transactions on
Publisher
ieee
ISSN
0018-9499
Type
jour
DOI
10.1109/23.603780
Filename
603780
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