Effects of hetero-related bulk-traps on photoresponse for long-wavelength HgCdTe infrared photodiode

Author

Hu, W.D. ; Chen, X.S. ; Yin, F. ; Ye, Z.H. ; Lin, C. ; Hu, X.N. ; Li, Z.F. ; Lu, W.

Author_Institution

Nat. Lab. for Infrared Phys., Chinese Acad. of Sci., Shanghai, China

fYear

2009

fDate

21-25 Sept. 2009

Firstpage

1

Lastpage

2

Abstract

Effects of hetero-related bulk traps on photoresponse for long-wavelength Hg_1-xCd_xTe infrared photodiodes have been numerically studied. The model involves a generalized approach, taking into account absorption coefficient, trap-assisted and band-to-band tunneling recombination mechanism, and bulk traps distributions associated with misfit dislocations present in the GaAs-substrate/Hg_1-xCd_xTe hetero-structure. The characteristic x-dependent material parameters, used in the simulations, such as donor concentration, trap density and level, and minority lifetime, are extracted by the simultaneous-mode nonlinear fitting procedure.

Keywords

II-VI semiconductors; III-V semiconductors; absorption coefficients; cadmium compounds; carrier lifetime; dislocations; electron traps; gallium arsenide; hole traps; infrared detectors; mercury compounds; photodetectors; photodiodes; semiconductor heterojunctions; tunnelling; GaAs-Hg_1-xCd_xTe; absorption coefficient; band-to-band tunneling recombination; bulk trap distribution; donor concentration; hetero-related bulk traps; long-wavelength infrared photodiodes; minority lifetime; misfit dislocations; photoresponse; simultaneous-mode nonlinear fitting procedure; trap density; trap level; Absorption; Doping; Electron traps; Gallium arsenide; Passivation; Photodiodes; Physics; Poisson equations; Substrates; Tunneling;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz Waves, 2009. IRMMW-THz 2009. 34th International Conference on

Conference_Location

Busan

Print_ISBN

978-1-4244-5416-7

Electronic_ISBN

978-1-4244-5417-4

Type

conf

DOI

10.1109/ICIMW.2009.5325757

Filename

5325757