In recent years,all inorganic CsPbX_(3)(X=F,Cl,Br,and I)perovskite quantum dots(QDs)have garnered increasing attention for their exceptional optical properties.However,the comme rcialization of CsPbX_(3)is hampered by...In recent years,all inorganic CsPbX_(3)(X=F,Cl,Br,and I)perovskite quantum dots(QDs)have garnered increasing attention for their exceptional optical properties.However,the comme rcialization of CsPbX_(3)is hampered by poor environmental stability and lead toxicity.Fortunately,the strategy of incorporating CsPbX_(3)into microcrystalline glass effectively addresses this issue.Notably,CsPbF_(3)demonstrates improved phase stability and a unique electronic structure,making its exploration crucial for various applications.In this study,we synthesized CsPbF_(3)QDs-in-glass(QiG)and Tb^(3+)-doped CsPbF_(3)QDs-inglasses(QiGs)using melt quenching and in-situ growth methods.The CsPbF_(3)QiG exhibits intrinsic photoluminescence with the main peak in the ultraviolet range,while Tb^(3+)-doped glasses show coemission of CsPbF_(3)QDs and Tb^(3+),allowing tunable colors by adjusting Tb^(3+)content.We systematically studied and evaluated the application of Tb^(3+)-doped CsPbF_(3)QiG as an optical temperature sensor.Importantly,the glass sample demonstrates high stability,including good thermal stability,superior high-temperature resistance,and moisture stability.This work significantly contributes to the exploration of the optical properties of CsPbF_(3)QiG,providing new insights into its future applications in diverse optical-related fields.展开更多
A series of single Ce^(3+) doped and Ce^(3+) and Tb^(3+) co-doped Na_(2)BaCa(PO_(4))_(2)(NBCP) phosphors was synthesized by conventional solid-stated reaction method.The crystal structure,luminescence properties,therm...A series of single Ce^(3+) doped and Ce^(3+) and Tb^(3+) co-doped Na_(2)BaCa(PO_(4))_(2)(NBCP) phosphors was synthesized by conventional solid-stated reaction method.The crystal structure,luminescence properties,thermal stability and energy transfer were carefully investigated.Ce^(3+) is inferred to substitute the Ba^(2+)site in NBCP lattice.The color-tunable emission from blue to green is observed by adjusting Tb^(3+) concentration among NBCP:0.03 Ce^(3+),yTb^(3+) phosphors.The energy transfer behavior from Ce^(3+) to Tb^(3+) ions is both illustrated by co-doped PL spectra and decay curves.The energy transfer efficiency is as high as 91.5%.The mechanism of energy transfer is resonance type of dipole-dipole transition.In this work,the optimal phosphor exhibits the excellent thermal stability which keeps at 94.9% of that initial value at room temperature when temperature reaches to 150℃.The Ce^(3+) and Tb^(3+) co-doped NBCP phosphor is a promising candidate for the application in the general lighting and display fields.展开更多
基金Project supported by the National Natural Science Foundation of China(51772330)。
文摘In recent years,all inorganic CsPbX_(3)(X=F,Cl,Br,and I)perovskite quantum dots(QDs)have garnered increasing attention for their exceptional optical properties.However,the comme rcialization of CsPbX_(3)is hampered by poor environmental stability and lead toxicity.Fortunately,the strategy of incorporating CsPbX_(3)into microcrystalline glass effectively addresses this issue.Notably,CsPbF_(3)demonstrates improved phase stability and a unique electronic structure,making its exploration crucial for various applications.In this study,we synthesized CsPbF_(3)QDs-in-glass(QiG)and Tb^(3+)-doped CsPbF_(3)QDs-inglasses(QiGs)using melt quenching and in-situ growth methods.The CsPbF_(3)QiG exhibits intrinsic photoluminescence with the main peak in the ultraviolet range,while Tb^(3+)-doped glasses show coemission of CsPbF_(3)QDs and Tb^(3+),allowing tunable colors by adjusting Tb^(3+)content.We systematically studied and evaluated the application of Tb^(3+)-doped CsPbF_(3)QiG as an optical temperature sensor.Importantly,the glass sample demonstrates high stability,including good thermal stability,superior high-temperature resistance,and moisture stability.This work significantly contributes to the exploration of the optical properties of CsPbF_(3)QiG,providing new insights into its future applications in diverse optical-related fields.
基金Project supported by The National Natural Science Foundation of China(51772330,51472273)the Natural Science Foundation of Hunan Province(2017JJ2403)the Key Research Foundation of Education Bureau of Hunan Province(16A220)。
文摘A series of single Ce^(3+) doped and Ce^(3+) and Tb^(3+) co-doped Na_(2)BaCa(PO_(4))_(2)(NBCP) phosphors was synthesized by conventional solid-stated reaction method.The crystal structure,luminescence properties,thermal stability and energy transfer were carefully investigated.Ce^(3+) is inferred to substitute the Ba^(2+)site in NBCP lattice.The color-tunable emission from blue to green is observed by adjusting Tb^(3+) concentration among NBCP:0.03 Ce^(3+),yTb^(3+) phosphors.The energy transfer behavior from Ce^(3+) to Tb^(3+) ions is both illustrated by co-doped PL spectra and decay curves.The energy transfer efficiency is as high as 91.5%.The mechanism of energy transfer is resonance type of dipole-dipole transition.In this work,the optimal phosphor exhibits the excellent thermal stability which keeps at 94.9% of that initial value at room temperature when temperature reaches to 150℃.The Ce^(3+) and Tb^(3+) co-doped NBCP phosphor is a promising candidate for the application in the general lighting and display fields.
