Flexible and Superhydrophobic Perovskite Composite Paper and Its Photoluminescent Performance
The halide perovskite shows a bright prospect in the next-generation lighting devices.However,perovskite nanocrystals suffer from rigidity and poor water stability.The hydroxyapatite(HA)nanowires were used as a flexible framework to support CsPbBr3 perovskite nanocrystals,followed by polydimethylsiloxane(PDMS)modification,perovskite composite paper with flexibility and superhydrophobic surfaces was prepared.The as-fabricated HA/CsPbBr3/PDMS composite paper showed the outstanding flexibility and structural stability after physical deformation.In addition,the HA/CsPbBr3/PDMS paper possessed superhydrophobic surface with a water contact angle of 151°.Therefore,the intensity of photoluminescent emission peak kept 98%initial value even after immersing composite paper in water for 5 h,and the composite paper still displayed the strong and homogeneous green fluorescence under UV irradiation(365 nm).
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