Computer simulation of non-cooled long-wavelength multijunction (Cd,Hg)Te photodiodes

A numerical analysis of long-wavelength multi-junction photodiodes construc ted from CdxHg1-xTe heterostructures is performed. The standard Newton iter ative scheme is applied to solve the non-linear system of continuity equati ons and the Poisson equation. All quantities are expressed as a function of electric potential and quasi-Fermi levels. Results of computations are pre sented in the form of maps and plots illustrating spatial distributions of electrical potential and responsivity. Such an illustration enables us to e xplain the effect of reverse sign of the photovoltage occurring in photoele ctric devices being manufactured. (C) 2000 Elsevier Science B.V. All rights reserved.