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- W3175070972 abstract "Significant progress has been achieved on perovskite nanocrystal (PNC)-converted light-emitting diodes (PcLEDs) with the development of surface encapsulations. However, achieving bright and long-living devices remains a challenge because the thermal isolation structure of the air barriers exacerbates heat accumulation inside PcLEDs. Here, we proposed a thermal conductive encapsulation for PNCs by embedding CsPbBr3 PNCs in layer-by-layer assembled boron nitride (BN) nanoplatelets through SiO2 crosslinking. This structure effectively suppresses the heat accumulation on PNCs and provides excellent air resistance, enabling the PNC–SiO2–BN composite to withstand 1000 h of photothermal annealing (under a 405 nm laser at 0.31 W cm–2, 80 °C in air) without showing obvious degradation. Green- and white-light PcLEDs were fabricated via on-chip encapsulation of PNC–SiO2–BN. The PcLEDs achieved the milestone in long-term stability (half-life time > 1000 h) at a high power density of ∼1.7 W cm–2 and displayed extradentary stability at ∼0.15 W cm–2 with constant light intensity within 1000 h of sustained illumination. The success in making thermal conductive composites will expedite the application of PNCs in LED backlights and other optoelectronic devices." @default.
- W3175070972 created "2021-07-05" @default.
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- W3175070972 date "2021-06-21" @default.
- W3175070972 modified "2023-10-16" @default.
- W3175070972 title "Thermal Conductive Encapsulation Enables Stable High-Power Perovskite-Converted Light-Emitting Diodes" @default.
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- W3175070972 doi "https://doi.org/10.1021/acsami.1c07194" @default.
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