Photocurrent and Surface Photovoltage Spectroscopy Investigations of CdTe-based Compounds

Author

Cavallini, Anna ; Cavalcoli, Daniela ; Castaldini, Antonio ; Fraboni, Beatrice

Author_Institution

Dept. of Phys., Bologna Univ.

Volume

6

fYear

2006

fDate

Oct. 29 2006-Nov. 1 2006

Firstpage

3724

Lastpage

3727

Abstract

The potentiality of photocurrent (PC) and surface photovoltage spectrosocopy (SPS) analyses in the determination of the band gap of CdTe-based ternary alloys was investigated. Both methods can detect band-to-band and defect state-to-band transitions. The role played by the surface states in both experimental methods has been studied since it may significantly alter the results. The below-band gap energy levels have also been detected by PC and SPS and the different information that can be obtained in the two cases has been discussed. The results obtained by PC and SPS have been compared in order to extract the contribution of the surface and bulk states.

Keywords

cadmium compounds; defect states; energy gap; photoconductivity; semiconductor counters; surface photovoltage; surface states; CdTe-based ternary alloys; band gap; band-to-band transition; bulk states; defect state-to-band transition; photocurrent; surface photovoltage spectroscopy; surface states; Detectors; Electrodes; Light sources; Optical surface waves; Photoconductivity; Photonic band gap; Physics; Spectroscopy; Telephony; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2006. IEEE

Conference_Location

San Diego, CA

ISSN

1095-7863

Print_ISBN

1-4244-0560-2

Electronic_ISBN

1095-7863

Type

conf

DOI

10.1109/NSSMIC.2006.353803

Filename

4179845