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- W4290672369 abstract "Perovskite light-emitting diodes are an emerging light source technology. However, similar to perovskite solar cells, poor operational stability remains an obstacle for commercial applications. Here we demonstrate ultrastable and efficient near-infrared (~800 nm) perovskite light-emitting diodes with record-long operational lifetimes (T50, extrapolated) of 11,539 h (~1.3 years) and 32,675 h (~3.7 years) for initial radiance (or current densities) of 3.7 W sr−1 m−2 (~5.0 mA cm−2) and 2.1 W sr−1 m−2 (~3.2 mA cm−2), respectively, with even longer lifetimes forecasted for lower radiance. Key to this stability is the introduction of a dipolar molecular stabilizer, which interacts with the cations and anions at the perovskite grain boundaries. This suppresses ion migration under electric fields, preventing the formation of lead iodide, which mediates the phase transformation and decomposition of α-FAPbI3 perovskite. These results remove the critical concern that halide perovskite devices may be intrinsically unstable, paving the path towards industrial applications. Near-infrared perovskite light-emitting diodes with extrapolated device lifespans on the scale of years are achieved by the use of a dipolar molecular stabilizer." @default.
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- W4290672369 date "2022-08-08" @default.
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- W4290672369 title "Ultrastable near-infrared perovskite light-emitting diodes" @default.
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- W4290672369 doi "https://doi.org/10.1038/s41566-022-01046-3" @default.
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