Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 52, Pages 58049-58059Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c18371
Keywords
perovskite quantum dots; polymethylsilsesquioxane aerogels; CsPbBr3; light-emitting diodes; photoluminescence
Funding
- Ministry of Science and Technology [MOST 108-2911-I-033-502, 108-2622-E-033-010 -CC3, 108-E-033-MY3]
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Highly stable all-inorganic perovskite quantum dot/polymethylsilsesquioxane aerogel (CsPbBr3/PMSQ AG) composites were first produced using two-step hot-injection and encapsulation processes by embedding green-emitting CsPbBr3 PQDs into modified hydrophobic mesoporous silica AGs. The unique structure of the composites not only considerably enhances the chemical stability of CsPbBr3 PQDs against moisture, humidity, and blue-light irradiation in air but also prevents anion exchange reactions during light-emitting diode (LED) manufacturing processes. In addition, the composition-optimized CsPbBr3/PMSQ AG exhibited excellent stability when soaked in water for more than 14 days and retained half of its initial intensity. Finally, white LED devices were fabricated by combining a blue-emitting GaN-based chip, green-emitting CsPbBr3/PMSQ AG, and red-emitting K2SiF6:Mn4+ phosphors.
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