Simulation of electric field profile in semi insulating Au/CdZnTe/Au detector under flux

J. Franc; R. Grill; R. James; J. Kubát; E. Belas; P. Moravec; P. Hoschl; P. Praus

doi:10.1117/12.829271

11 September 2009 Simulation of electric field profile in semi insulating Au/CdZnTe/Au detector under flux

J. Franc, R. Grill, R. James, J. Kubát, E. Belas, P. Moravec, P. Hoschl, P. Praus

Proceedings Volume 7449, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XI; 74490A (2009) https://doi.org/10.1117/12.829271
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

We report our simulations on the profile of the electric field in semi insulating CdTe and CdZnTe with Au contacts under radiation flux. The type of the space charge and electric field distribution in the Au/CdTe/Au structure is at high fluxes result of a combined influence of charge formed due to band bending at the electrodes and from photo generated carriers, which are trapped at deep levels. Simultaneous solution of drift-diffusion and Poisson equations is used for the calculation. We show, that he space charge originating from trapped photo-carriers starts to dominate at fluxes 10¹⁵-10¹⁶cm^-2s^-1, when the influence of contacts starts to be negligible.

Citation Download Citation

J. Franc, R. Grill, R. James, J. Kubát, E. Belas, P. Moravec, P. Hoschl, and P. Praus "Simulation of electric field profile in semi insulating Au/CdZnTe/Au detector under flux", Proc. SPIE 7449, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XI, 74490A (11 September 2009); https://doi.org/10.1117/12.829271

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