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• W3177223669 endingPage "2103275" @default.
• W3177223669 startingPage "2103275" @default.
• W3177223669 abstract "The disappointing stability of perovskites, especially in water, remains a key issue hindering their further commercialization. Here, CsPbBr3/CsPb2Br5@PbBr(OH) (PQDs@PbBr(OH)) nano/microspheres with superior stability and outstanding photoluminescence quantum yield (PLQY, ≈98%) are fabricated through a water-assisted process. The nano/microspheres can maintain excellent photoluminescence (PL) intensity and high PLQY (≈90%) when immersed in water for more than 18 months. By changing the water content in the reaction mixture, the phase, particle size, and PL peaks of the nano/microspheres will change. Compared with CsPbBr3/Cs4PbBr6 nanocrystals synthesized without water, PQDs@PbBr(OH) nano/microspheres exhibit better thermal stability, photostability, and superior stability in water. Based on the first-principles calculations, the enhanced stability results from PbBr(OH) with high decomposition enthalpy in water, which can effectively prevent water from contacting PQDs embedded in it. Moreover, white light-emitting diodes are fabricated by mixing green-emitting PQDs@PbBr(OH) powder and K2SiF6:Mn4+ (KSF) red phosphor on a 460 nm blue chip and the device shows a high luminous efficacy of 101.27 lm W−1 at 10 mA. This work not only provides a reliable method for the facile preparation of ultrastable perovskites, but also has great potentials for future practical applications." @default.
• W3177223669 created "2021-07-05" @default.
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• W3177223669 date "2021-06-25" @default.
• W3177223669 modified "2023-10-17" @default.
• W3177223669 title "In Situ Embedding Synthesis of Highly Stable CsPbBr ₃ /CsPb ₂ Br ₅ @PbBr(OH) Nano/Microspheres through Water Assisted Strategy" @default.
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• W3177223669 doi "https://doi.org/10.1002/adfm.202103275" @default.
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