Bi2S3 as a high Z material for γ-ray detectors

Abstract
The semiconductor Bi2S3 has a bandgap of 1.3 eV and reported mobilities of 200 cm2/V for holes and 1100 cm2/V for electrons. Its absorption cross section is 1.8 times that of Hg I2. We report compensation of this material to 107 to 109 Ω-cm and initial results on γ-ray detection properties.

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