Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)
- 2006.04a
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- Pages.85-88
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- 2006
Transport property of a Se:As films for digital x ray imaging
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Kim, Jae-Hyung
(Medical Image Research Lab., Inje University) ;
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Nam, Sang-Hee
(Medical Image Research Lab., Inje University)
- Published : 2006.04.28
Abstract
The transport properties of amorphous selenium typical of the material used in direct conversion x-ray imaging devices are reported. The effects of As addition on the carrier mobility and recombination lifetime in amorphous selenium (a-Se) films have been studied using the moving photocarrier grating (MPG) technique. We have found an increase in hole drift mobility and recombination lifetime, especially when 0.3% As is added into a-Se film, whereas electron mobility decreases with As addition due to the defect density. The transport properties for As doped a-Se films obtained by using MPG technique have been compared with the drift mobilities of holes and electrons obtained by time of flight (TOF) measurement.