The role of photon recycling in perovskite light-emitting diodes.

Changsoon Cho, Baodan Zhao, Gregory D Tainter, Jung-Yong Lee, Richard Friend, Dawei Di, Felix Deschler & Neil Greenham
Perovskite light-emitting diodes have recently broken the 20% barrier for external quantum efficiency. These values cannot be explained with classical models for optical outcoupling. Here, we analyse the role of photon recycling (PR) in assisting light extraction from perovskite light-emitting diodes. Spatially-resolved photoluminescence and electroluminescence measurements combined with optical modelling show that repetitive re-absorption and re-emission of photons trapped in substrate and waveguide modes significantly enhance light extraction when the radiation efficiency is sufficiently high....
1 citation reported since publication in 2020.
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