| All-inorganic CsPbX3 perovskite materials have excellent optoelectronic properties and great application potential in the field of optoelectronic devices.However,due to the poor stability,toxicity of lead and the relative lag of research progress on red-emitting Cs Pb I3perovskite nanocrystals,Cs Pb X3perovskite materials can not meet the needs of practical applications.In order to solve the above problems,Cs Pb I3-based perovskite nanocrystals were crystallized in situ in a highly stable glass matrix,and the red light glasses were successfully applied to advanced lighting fields such as light-emitting diodes（LED）.According to the above research points,this paper mainly includes the following parts:1.A series of Ti-doped CsPbI3 nanocrystals were successfully prepared by melt-quenching and in-situ crystallization in borosilicate glass matrix.By changing the doping amount of Ti and heat treatment temperature,the fluorescence emission wavelength of Cs Pb1-xTixI3 nanocrystalline glass can be adjusted.The excellent optical properties and stability of CsPb1-xTixI3 nanocrystalline glass in water/heat environment were also obtained.The prepared CsPb1-xTixI3 nanocrystalline glasses were used to construct high quality WLEDs and LED for plant growth,which provides a new idea for low toxicity and red perovskite light emitting devices.2.The coexistence of CsPbCl3 and CsPbI3 nanocrystals was successfully realized by in-situ crystallization method in glass matrix for the first time.Due to the photon reabsorption effect,Cs Pb Cl3:CsPbI3 nanocrystals emitted red light and exhibited higher fluorescence emission intensity and quantum yield than CsPbI3 nanocrystals.In addition,CsPbCl3:CsPbI3 nanocrystalline glass had excellent water resistance and thermal stability.Especially after soaking in water for 60 days,the fluorescence intensity remained above 95%.Finally,the red LED device used in indoor plant cultivation was constructed with CsPbCl3:CsPbI3 nanocrystalline glass. |
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