Influence of mobile ions on the electroluminescence characteristics of methylammonium lead iodide perovskite diodes

Enrico Bandiello, Jorge Avila, Lidon Gil-Escrig, Eelco Tekelenburg, Michele Sessolo*, Henk J. Bolink

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    13 Citations (Scopus)

    Abstract

    In this work, we study the effect of voltage bias on the optoelectronic behavior of methylammonium lead iodide planar diodes. Upon biasing the diodes with a positive voltage, the turn-on voltage of the electroluminescence diminishes and its intensity substantially increases. This behavior is reminiscent of that observed in light-emitting electrochemical cells (LECs), single-layer electroluminescent devices in which the charge injection is assisted by the accumulation of ions at the electrode interface. Because of this mechanism, performances are largely independent from the work function of the electrodes. The similarities observed between planar perovskite diodes and LECs suggest that mobile ions in the perovskite do play an important rote in device operation. Besides enhanced electroluminescence, biasing these devices can also result in improved photovoltaic performance.

    Original languageEnglish
    Pages (from-to)18614-18620
    Number of pages7
    JournalJournal of Materials Chemistry A
    Volume4
    Issue number47
    DOIs
    Publication statusPublished - 21-Dec-2016

    Keywords

    • EMITTING ELECTROCHEMICAL-CELLS
    • EXCITON BINDING-ENERGY
    • TURN-ON TIMES
    • P-N-JUNCTION
    • SOLAR-CELLS
    • HALIDE PEROVSKITES
    • EFFECTIVE MASSES
    • RECENT PROGRESS
    • HYSTERESIS
    • PERFORMANCE

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