Rubel O, Potvin A, Laughton D. Generalized lucky-drift model for impact ionization in semiconductors with disorder.
JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2011;
23:055802. [PMID:
21406915 DOI:
10.1088/0953-8984/23/5/055802]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
An extension of an original lucky-drift model to the case of disordered semiconductors is proposed, motivated by experimental observations of an avalanche phenomenon in amorphous semiconductors. The generalization encompasses two scattering mechanisms: an inelastic one due to optical phonons and an elastic one due to a disorder potential. An obtained analytical solution is verified by a kinetic Monte Carlo simulation. Eventually, experimental data on a field dependence of the impact ionization coefficient in amorphous selenium are interpreted using reasonable material parameters.
Collapse