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- W3102000695 abstract "Light-emitting diodes based on halide perovskites have recently reached external quantum efficiencies of over 20%. However, the performance of visible perovskite light-emitting diodes has been hindered by non-radiative recombination losses and limited options for charge-transport materials that are compatible with perovskite deposition. Here, we report efficient, green electroluminescence from mixed-dimensional perovskites deposited on a thin (~1 nm) lithium fluoride layer on an organic semiconductor hole-transport layer. The highly polar dielectric interface acts as an effective template for forming high-quality bromide perovskites on otherwise incompatible hydrophobic charge-transport layers. The control of crystallinity and dimensionality of the perovskite layer is achieved by using tetraphenylphosphonium chloride as an additive, leading to external photoluminescence quantum efficiencies of around 65%. With this approach, we obtain light-emitting diodes with external quantum efficiencies of up to 19.1% at high brightness (>1,500 cd m−2). Green perovskite light-emitting diodes with external quantum efficiencies of up to 19.1% at high brightness can be created by depositing an ultrathin layer of strongly polar lithium fluoride between the perovskite and hole-transport layers." @default.
- W3102000695 created "2020-11-23" @default.
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- W3102000695 date "2020-10-19" @default.
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- W3102000695 title "Efficient light-emitting diodes from mixed-dimensional perovskites on a fluoride interface" @default.
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- W3102000695 doi "https://doi.org/10.1038/s41928-020-00487-4" @default.
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