Photoinduced electrification of solids. IV. Space charge effects assessed

TL;DR

This paper investigates space charge effects in photoinduced electrification of solids, proposing a diffusion-free model to better understand short circuit photocurrents caused by surface ion photodesorption.

Contribution

It introduces a new approach to analyze space charge effects in solid photoelectrification, extending previous models by including diffusion-free approximations.

Findings

Proposes a diffusion-free model for space charge effects.

Provides analysis of short circuit photo voltages.

Enhances understanding of surface ion photodesorption mechanisms.

Abstract

Our recent arXiv preprints have described the experimental evidence for the universal occurrence of short circuit photocurrents on illumination of solid state surfaces by strongly absorbed light. A likely mechanism has been proposed based on the photodesorption of surface ions to the surrounding atmosphere. Analyses have been made of observed oscilloscope tracings of short circuit photo voltages in terms of the linear rate theory in fair concomitance. Space charge effects having been left unaccounted for, we now propose an approach to them in the diffusion-free approximation.