Kinetics of Exciton Emission Patterns and Carrier Transport

TL;DR

This paper investigates the dynamics of exciton emission rings, demonstrating that their kinetics are governed by charge carrier transport, and introduces a contactless method to measure electron and hole transport properties.

Contribution

It provides a novel experimental approach linking ring kinetics to carrier transport, validated by a theoretical model, enabling contactless characterization of transport properties.

Findings

Ring integrity is preserved during expansion and collapse.

Kinetics are controlled by charge carrier transport, not exciton production or decay.

Method allows contactless measurement of electron and hole transport characteristics.

Abstract

We report on the measurements of the kinetics of expanding and collapsing rings in the exciton emission pattern. The rings are found to preserve their integrity during expansion and collapse, indicating that the observed kinetics is controlled by charge carrier transport rather than by a much faster process of exciton production and decay. The relation between ring kinetics and carrier transport, revealed by our experiment and confirmed by comparison with a theoretical model, is used to determine electron and hole transport characteristics in a contactless fashion.