Parametric study of highly-efficient light-emitting diodes for thermophotonic cooling

Abstract

This work focuses on the physics-based simulation and analysis of III-arsenide LED devices with potential applications in electroluminescent cooling (ELC). The structure of the LEDs is modified by engineering, specifically, the active region either by doping it or modifying its structure by introducing multiple barrier layers. Device characteristics analysis is carried out using an experimentally calibrated physical model. Such model is based on the drift-diffusion method for electronic charge transport studies and is implemented within the COMSOL Multiphysics software environment employing the finite element method. The results show promising trends, with the studied structures allowing an extension of the high internal quantum efficiency bias region, leading to an above-unity wall-plug efficiency and hence ELC.