Efficiency Boosting by Thermal Harvesting in InGaN/GaN Light-Emitting Diodes

On the same micro-LED display panel, LED pixels are always operated with high and low biased voltages simultaneously to show different brightness colors. Thus, it is vitally important understand effect of heat transmission between LEDs under voltages. In this work, we design two groups: Group A bonded together for B separated from each other. Then, at one fixed tuned voltage respectively in group a vacuum chamber efficiency groups studied both experimentally numerically. Here, our experimental results demonstrate that exhibits maximum improvement 15.36% optical output power compared B. The underlying reason wall-plug lower than photon ( V < ℏω/ q ) surprisingly enhanced by elevated temperature owing A. Our further study shows such region attributed carrier concentrations temperature. other hand, raises overall alleviating thermal droop due reduced Device measurement numerical calculation radiative recombination temperatures support superior performance LEDs. research can act as prototype high-efficient arrays better energy recycling control.