TY - GEN
T1 - Alkali metal chalcogenides for radiation detection
AU - Peters, J. A.
AU - Liu, Zhifu
AU - Wessels, B. W.
AU - Androulakis, I.
AU - Sebastian, C. P.
AU - Li, Hao
AU - Kanatzidis, M. G.
N1 - Funding Information:
This work was supported by DTRA under grant no. HDTRA1-09-1-0044. Extensive use of the microfabrication facilities of the Materials Research Center at Northwestern University supported by the NSF (No. DMR 0076097) is acknowledged.
PY - 2012
Y1 - 2012
N2 - We report on the optical and charge transport properties of novel alkali metal chalcogenides, Cs 2Hg 6S 7 and Cs 2Cd 3Te 4, pertaining to their use in radiation detection. Optical absorption, photoconductivity, and gamma ray response measurements for undoped crystals were measured. The band gap energies of the Cs 2Hg 6S 7 and Cs 2Cd 3Te 4 compounds are 1.63 eV and 2.45 eV, respectively. The mobility-lifetime products for charge carriers are of the order of ∼10 -3 cm 2/V for electrons and ∼10 -4 cm 2/V for holes. Detectors fabricated from the ternary compound Cs 2Hg 6S 7 shows well-resolved spectroscopic features at room temperature in response to γ-rays at 122 keV from a 57Co source, indicating its potential as a radiation detector.
AB - We report on the optical and charge transport properties of novel alkali metal chalcogenides, Cs 2Hg 6S 7 and Cs 2Cd 3Te 4, pertaining to their use in radiation detection. Optical absorption, photoconductivity, and gamma ray response measurements for undoped crystals were measured. The band gap energies of the Cs 2Hg 6S 7 and Cs 2Cd 3Te 4 compounds are 1.63 eV and 2.45 eV, respectively. The mobility-lifetime products for charge carriers are of the order of ∼10 -3 cm 2/V for electrons and ∼10 -4 cm 2/V for holes. Detectors fabricated from the ternary compound Cs 2Hg 6S 7 shows well-resolved spectroscopic features at room temperature in response to γ-rays at 122 keV from a 57Co source, indicating its potential as a radiation detector.
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U2 - 10.1557/opl.2011.1482
DO - 10.1557/opl.2011.1482
M3 - Conference contribution
AN - SCOPUS:84863129065
SN - 9781605113180
T3 - Materials Research Society Symposium Proceedings
SP - 133
EP - 138
BT - Nuclear Radiation Detection Materials - 2011
T2 - 2011 MRS Spring Meeting
Y2 - 25 April 2011 through 29 April 2011
ER -