On the efficiency roll-off in Perovskite Light Emitting Diodes

Pradeep R Nair; Advaith Kiran Marathi

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arXiv · 2507.22741

On the efficiency roll-off in Perovskite Light Emitting Diodes

Pradeep R Nair·Advaith Kiran Marathi

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Abstract

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.

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Pradeep R Nair, Advaith Kiran Marathi. 2025-07-30. On the efficiency roll-off in Perovskite Light Emitting Diodes. https://arxiv.org/abs/2507.22741

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