Thallium Chalcohalides for X-ray and γ-ray Detection

We report that the chalcohalide compound Tl6SeI4 is a promising material for efficient X-ray and γ-ray detection. This material has a higher figure of merit than the current state-of-the-art material for room-temperature operation, Cd0.9Zn0.1Te (CZT). We have synthesized high-quality single-crystall...

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Published inJournal of the American Chemical Society Vol. 133; no. 26; pp. 10030 - 10033
Main Authors Johnsen, Simon, Liu, Zhifu, Peters, John A, Song, Jung-Hwan, Nguyen, Sandy, Malliakas, Christos D, Jin, Hosub, Freeman, Arthur J, Wessels, Bruce W, Kanatzidis, Mercouri G
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 06.07.2011
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Summary:We report that the chalcohalide compound Tl6SeI4 is a promising material for efficient X-ray and γ-ray detection. This material has a higher figure of merit than the current state-of-the-art material for room-temperature operation, Cd0.9Zn0.1Te (CZT). We have synthesized high-quality single-crystalline wafers of Tl6SeI4 with detector-grade resistivities and good carrier transport of both electrons and holes. We demonstrate that pulse height spectra recorded using Co-57 radiation show an energy resolution matching that of a commercial CZT detector material.
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ISSN:0002-7863
1520-5126
DOI:10.1021/ja202540t