Enhanced LED Performance by Ion Migration in Multiple Quantum Well Perovskite

Shir Yudco, Juan Bisquert, Lioz Etgar*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Here we study the effect of ion migration on the performance of perovskite light emitting diodes (PeLEDs). We compared aromatic and linear barrier molecules in Ruddlesden-Popper and Dion-Jacobson two-dimensional perovskites having multiple quantum well (MQW) structures. PeLED devices were fabricated by using the same conditions and architecture, while their electroluminescence properties and ion migration behavior were investigated. Impedance spectroscopy measurements were used to analyze the PeLEDs, which found a direct link between the barrier molecule type, the device efficiency, and ion migration. The best performing LEDs were based on the aromatic barriers, which present dominant inductive impedance, indicating an earlier onset voltage of radiative recombination. These findings present an approach of how to control radiative emission in perovskite LEDs which opens the way for further improvement in PeLEDs and memristors.

Original languageAmerican English
Pages (from-to)11610-11617
Number of pages8
JournalJournal of Physical Chemistry Letters
Volume14
Issue number51
DOIs
StatePublished - 28 Dec 2023

Bibliographical note

Publisher Copyright:
© 2023 American Chemical Society.

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