Abstract
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.
Original language | English (US) |
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Title of host publication | Nuclear Radiation Detection Materials - 2011 |
Pages | 133-138 |
Number of pages | 6 |
DOIs | |
State | Published - 2012 |
Event | 2011 MRS Spring Meeting - San Francisco, CA, United States Duration: Apr 25 2011 → Apr 29 2011 |
Publication series
Name | Materials Research Society Symposium Proceedings |
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Volume | 1341 |
ISSN (Print) | 0272-9172 |
Other
Other | 2011 MRS Spring Meeting |
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Country/Territory | United States |
City | San Francisco, CA |
Period | 4/25/11 → 4/29/11 |
Funding
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.
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering