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Role of electrode metallization in performance of semi-insulating GaAs radiation detectors

✍ Scribed by František Dubecký; Pavol Boháček; Mária Sekáčová; Bohumír Zaťko; Tibor Lalinský; Vladimír Linhart; Andrea Šagátová-Perd’ochová; Ján Mudroň; Stanislav Pospíšil

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
165 KB
Volume
576
Category
Article
ISSN
0168-9002

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✦ Synopsis

In the present work, a comparative study of semi-insulating (SI) GaAs radiation detectors with different blocking (Schottky) and ohmic contact metallization is presented. The detectors fabricated from ''detector-grade'' bulk SI GaAs are characterized by current-voltage measurements and their detection performance is evaluated from pulse-height spectra of 241 Am and 57 Co g-sources.

Observed results are evaluated and discussed. Importance of the optimized electrodes technology of SI GaAs detector with good performance is demonstrated.

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