Here, we report a comprehensive modeling framework to unravel the efficiency roll-off in Perovskite light emitting diodes (PeLEDs). Our model self-consistently accounts for a positive feedback mechanism which involves diverse phenomena like temperature-dependent carrier recombination, space charge effects, Joule heating, and thermal transport. Model predictions compare well with experimental results such as dark current-voltage characteristics and efficiency as well as radiance roll-off under high injection conditions. This work identifies key performance limiting phenomena in current state-of-the-art PeLEDs and could be of broad relevance towards device optimization, thermal design, packaging, and operational lifetime.
@article{arxiv.2507.22741,
title = {On the efficiency roll-off in Perovskite Light Emitting Diodes},
author = {Pradeep R Nair and Advaith Kiran Marathi},
journal= {arXiv preprint arXiv:2507.22741},
year = {2025}
}