Formation of Aluminum Schottky Contact on Plasma-Treated Cadmium Telluride Surface
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概要
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We have studied the effect of plasma treatment on the rectification property and performance of the CdTe radiation detector with the Al Schottky electrode. The Te-rich layer on the CdTe surface etched with Br-methanol caused the degradation of the rectification property of the Al/CdTe Schottky contact. To remove the Te-rich layer, plasma treatment was carried out. The plasma treatment did not roughen the CdTe surface, and it removed the Te-rich layer. In terms of current–voltage characteristics of the Al/CdTe Schottky contact, the leakage current of the samples with plasma treatment was lower than that of the samples without plasma treatment. Moreover, in terms of detector performance, the samples with plasma treatment showed a higher energy resolution than those without plasma treatment. We achieved a high energy resolution of 1.6 keV FWHM at 59.5 keV using the plasma-treated Al/CdTe/Pt detector, which is comparable to the value obtained using a conventional Schottky-type In/CdTe/Pt detector.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2004-09-15
著者
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Higa Akira
Faculty Of Engineering University Of The Ryukyus
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Toguchi Minoru
Faculty Of Engineering University Of The Ryukyus
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NISHIHIRA Atsushi
Faculty of Engineering, University of the Ryukyus
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Toyama Hiroyuki
Faculty Of Engineering University Of The Ryukyus
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Maehama Takehiro
Faculty Of Engineering University Of The Ryukyus
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Ohno Ryoichi
Acrorad Co. Ltd.
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Yamazato Masaaki
Faculty Of Engineering University Of The Ryukyus
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Maehama Takehiro
Faculty of Engineering, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan
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Higa Akira
Faculty of Engineering, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan
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Ohno Ryoichi
Acrorad Co., Ltd., 13-23 Suzaki, Gushikawa, Okinawa 904-2234, Japan
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Yamazato Masaaki
Faculty of Engineering, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan
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Toyama Hiroyuki
Faculty of Engineering, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan
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Nishihira Atsushi
Faculty of Engineering, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan
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