Thanks to their tunable luminescence,narrow emission range,and superior color fidelity,perovskite quantum dots(PeQDs)are widely considered as promising materials for next-generation backlight displays.However,the susc...Thanks to their tunable luminescence,narrow emission range,and superior color fidelity,perovskite quantum dots(PeQDs)are widely considered as promising materials for next-generation backlight displays.However,the susceptibility to degradation and failure when exposed to ambient environment significantly hampers their widespread applications.Herein,we reported an effective strategy to encapsulate CsPbBr_(3)nanocrystals into robust KBr matrix via cold sintering process at 120℃.The well prepared translucent CsPbBr_(3)@KBr ceramic displays a narrow green photoluminescence(with a fullwidth at half-maximum of~22 nm)and an quantum yield of 73.6%with remarkable thermal stability.By incorporating red emitting K_(2)SiF_(4):Mn^(4+)phosphor into the KBr matrix,the color gamut of the constructed white LED improves to 118%of the National Television System Committee(NTSC)standard,suggesting that the thermally robust and narrow-band green emitter holds significant promise for widecolor-gamut liquid crystal displays.展开更多
基金supported by the National Natural Science Foundation of China(No.52350443 and No.52122203)the Natural Science Foundation of Shanghai(No.21ZR1400300).
文摘Thanks to their tunable luminescence,narrow emission range,and superior color fidelity,perovskite quantum dots(PeQDs)are widely considered as promising materials for next-generation backlight displays.However,the susceptibility to degradation and failure when exposed to ambient environment significantly hampers their widespread applications.Herein,we reported an effective strategy to encapsulate CsPbBr_(3)nanocrystals into robust KBr matrix via cold sintering process at 120℃.The well prepared translucent CsPbBr_(3)@KBr ceramic displays a narrow green photoluminescence(with a fullwidth at half-maximum of~22 nm)and an quantum yield of 73.6%with remarkable thermal stability.By incorporating red emitting K_(2)SiF_(4):Mn^(4+)phosphor into the KBr matrix,the color gamut of the constructed white LED improves to 118%of the National Television System Committee(NTSC)standard,suggesting that the thermally robust and narrow-band green emitter holds significant promise for widecolor-gamut liquid crystal displays.
