Spectral distribution of photomagnetoelectric and photoconductivity currents inn-GaSe single crystals: Theory and experiment

Abstract

A model is presented by which the various transport parameters (ambipolar diffusion length, hole and electron lifetimes, and surface recombination velocities) are obtained directly by fitting the experimental photomagnetoelectric and photoconductivity spectral distributions. The model improves the one introduced by Gärtner, since it allows for different hole and electron lifetimes and for anisotropy of mobilities. An experimental application to $n$-GaSe is presented, and the results are discussed and compared with previous ones.