Spectrometric properties of single and series-connected Cr/CdTe/Au Schottky-diode detectors

Valeriy Sklyarchuk; Volodymyr Gnatyuk; Toru Aoki

doi:10.1117/12.3027469

4 October 2024 Spectrometric properties of single and series-connected Cr/CdTe/Au Schottky-diode detectors

Valeriy Sklyarchuk, Volodymyr Gnatyuk, Toru Aoki

Author Affiliations +

Proceedings Volume 13151, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXVI; 131510K (2024) https://doi.org/10.1117/12.3027469
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Conference Poster

Abstract

A comparative analysis of the ¹³⁷Cs isotope spectra measured both by single and series-connected Cr/CdTe/Au diodetype X/γ-ray detectors has been conducted. Rectifying (Cr) and ohmic (Au) contacts were respectively formed on the Band A-faces of detector-grade CdTe(111) crystals after Ar plasma surface processing. The diode sandwiches (stacks) were created by staking and connecting in series two Cr/CdTe/Au Schottky diodes with similar parameters. A key feature of the ¹³⁷Cs isotope spectra obtained from these sandwiches was the presence of two peaks with maxima and energy positions (channel numbers) depending on the CdTe crystal thickness and relative positions of the diodes in the sandwich. The sum of channel numbers corresponding to these peaks equaled the channel number of the peak in the spectrum obtained by a single diode. Even when Cr/CdTe/Au diodes of different thicknesses were used in the sandwich, the sum of the channel numbers corresponding to two peaks in the ¹³⁷Cs spectra remained constant. The heights (maxima) of the two peaks were much higher than the peak height the spectrum measured by a single diode. The series-connected Cr/CdTe/Au Schottky diodes detected X/γ-rays much more effectively than a single detector at a bias voltage equal to half that applied to the sandwich. Another advantage of the diode sandwiches was the time stability of their characteristics. The ¹³⁷Cs isotope spectrum degraded during 8 hours of measurement by a single detector, while no noticeable changes were found in detection efficiency and energy resolution when the sandwich detectors were used.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Valeriy Sklyarchuk, Volodymyr Gnatyuk, and Toru Aoki "Spectrometric properties of single and series-connected Cr/CdTe/Au Schottky-diode detectors", Proc. SPIE 13151, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXVI, 131510K (4 October 2024); https://doi.org/10.1117/12.3027469

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE