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- W3209321868 abstract "Although a variety of passivators have been researched to passivate the defects, sufficient defect passivation still remains a challenge to further elevate the efficiency of perovskite light emitting diodes (PeLEDs). Herein, we report that the BMIM+ ions of the 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4) ionic liquid have effective passivation interaction to the Pb-related defects. And, the spontaneously formed targeted distribution of the BMIM+ ions on the crystal surface and film top surface of the polycrystalline perovskite layers well matches the defect site distribution, resulting in the defects being sufficiently passivated. As a result, sufficient defect passivation of ionic liquid enables the photoluminescence quantum yields (PLQYs) to reach 100% and the maximum external quantum efficiency (EQE) of the PeLEDs increased to 22.9%. This work initializes the selection of the promising ionic liquid passivators for high efficiency PeLEDs and highlights the critical role of the passivator spatial distribution for sufficient defect passivation." @default.
- W3209321868 created "2021-11-08" @default.
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- W3209321868 date "2021-11-03" @default.
- W3209321868 modified "2023-10-14" @default.
- W3209321868 title "Targeted Distribution of Passivator for Polycrystalline Perovskite Light-Emitting Diodes with High Efficiency" @default.
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- W3209321868 doi "https://doi.org/10.1021/acsenergylett.1c01753" @default.
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