Characterization of lithium indium diselenide
Lithium indium diselenide ( 6 LiInSe 2 ) has drawn interest in recent years as a thermal neutron detector due to its high volumetric thermal neutron detection efficiency. Enriched in 6 Li, the single crystalline semiconductor can reach thermal neutron detection efficiencies approaching 80% at thickn...
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| Published in: | 2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) pp. 1 - 3 |
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| Main Authors: | , , , , , , |
| Format: | Conference Proceeding |
| Language: | English |
| Published: |
IEEE
01-10-2015
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | Lithium indium diselenide ( 6 LiInSe 2 ) has drawn interest in recent years as a thermal neutron detector due to its high volumetric thermal neutron detection efficiency. Enriched in 6 Li, the single crystalline semiconductor can reach thermal neutron detection efficiencies approaching 80% at thickness of 0.5 cm. With a Q-value of 4.78 MeV, the material also offers neutrongamma discrimination capabilities. Identification and implementation of a contact scheme that is both robust and reproducible is important for its commercial potential. Thorough testing of a myriad of contact schemes yielded a viable Ohmic contact with sufficient adhesion to endure gold wire wedge bonding. Furthermore, characterization of the semiconducting properties, such as the charge carrier mobility-lifetime constant of this material as a radiation detector is important to identify the application space of this material. Using the single charge carrier approximation to the Hecht relation, the electron mobility-lifetime product was found to be on the order of 3.8-90 cm 2 /V with a mean ionization energy of 400 eV/e-h pair. |
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| DOI: | 10.1109/NSSMIC.2015.7582284 |