As a leader of long persistent luminescence(LPL) materials, the optical properties of aluminate phosphor have remained unsurpassed for many years. As a powder material, its practical application will always be limited...As a leader of long persistent luminescence(LPL) materials, the optical properties of aluminate phosphor have remained unsurpassed for many years. As a powder material, its practical application will always be limited to the field of security signs. In this paper, the SrAl_(2)O_(4)∶Eu^(2+), Dy^(3+)inorganic solid material with comparable LPL properties to powder materials was obtained. The crystallization mechanism and crystallite micro-morphology of inorganic glass materials have been studied, and a new opinion is put forward that the large-size SrAl_(2)O_(4)crystallites in the glass matrix are stacked by rod-shaped crystals arranged in a regular direction. In addition,the SrAl_(2)O_(4)∶Eu^(2+), Dy^(3+)glass obtained cannot only collect high-energy photons but also is sensitive to lowenergy sunlight. The results show that the material exhibits superior performance in LPL, thermoluminescence,and photostimulable luminescence. Based on this property, a new application of this material in the field of information storage was explored. This paper has a certain reference value for the development and application of aluminate LPL materials in the field of smart optical information storage.展开更多
Scintillators are of significance for the realization of indirect X-ray detection and X-ray excited optical luminescence(XEOL)imaging.However,commercial bulk scintillators not only require complex fabrication procedur...Scintillators are of significance for the realization of indirect X-ray detection and X-ray excited optical luminescence(XEOL)imaging.However,commercial bulk scintillators not only require complex fabrication procedures,but also exhibit non-tunable XEOL wavelength and poor device processability.Moreover,thick crystals usually generate light scattering followed by evident signal crosstalk in a photodiode array.Lanthanide doped fluoride nanoscintillators(NSs)prepared with low-temperature wet-chemical method possess several advantages,such as low toxicity,cheap fabrication cost,convenient device processability and adjustable emission wavelengths from ultraviolet to visible and extending to second near infrared window.In addition,they exhibit X-ray excited long persistent luminescence(XEPL)making them suitable for broadening the scope of their applications.This review discusses and summarizes the XEOL and XEPL characteristics of lanthanide doped fluoride NSs.We discuss design strategies and nanostructures that allow manipulation of excitation dynamics in a core-shell geometry to simultaneously produce XEOL,XEPL,as well as photon upconversion and downshifting,enabling emission at multiple wavelengths with a varying time scale profile.The review ends with a discussion of the existing challenges for advancing this field,and presents our subjective insight into areas of further multidisciplinary opportunities.展开更多
基金Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province of China,National Natural Science Foundation of China (62075204,U1909211)。
文摘As a leader of long persistent luminescence(LPL) materials, the optical properties of aluminate phosphor have remained unsurpassed for many years. As a powder material, its practical application will always be limited to the field of security signs. In this paper, the SrAl_(2)O_(4)∶Eu^(2+), Dy^(3+)inorganic solid material with comparable LPL properties to powder materials was obtained. The crystallization mechanism and crystallite micro-morphology of inorganic glass materials have been studied, and a new opinion is put forward that the large-size SrAl_(2)O_(4)crystallites in the glass matrix are stacked by rod-shaped crystals arranged in a regular direction. In addition,the SrAl_(2)O_(4)∶Eu^(2+), Dy^(3+)glass obtained cannot only collect high-energy photons but also is sensitive to lowenergy sunlight. The results show that the material exhibits superior performance in LPL, thermoluminescence,and photostimulable luminescence. Based on this property, a new application of this material in the field of information storage was explored. This paper has a certain reference value for the development and application of aluminate LPL materials in the field of smart optical information storage.
基金Zhejiang Provincial Natural Science Foundation of China(No.LZ21A040002)National Natural Science Foundation of China(No.52172164).
文摘Scintillators are of significance for the realization of indirect X-ray detection and X-ray excited optical luminescence(XEOL)imaging.However,commercial bulk scintillators not only require complex fabrication procedures,but also exhibit non-tunable XEOL wavelength and poor device processability.Moreover,thick crystals usually generate light scattering followed by evident signal crosstalk in a photodiode array.Lanthanide doped fluoride nanoscintillators(NSs)prepared with low-temperature wet-chemical method possess several advantages,such as low toxicity,cheap fabrication cost,convenient device processability and adjustable emission wavelengths from ultraviolet to visible and extending to second near infrared window.In addition,they exhibit X-ray excited long persistent luminescence(XEPL)making them suitable for broadening the scope of their applications.This review discusses and summarizes the XEOL and XEPL characteristics of lanthanide doped fluoride NSs.We discuss design strategies and nanostructures that allow manipulation of excitation dynamics in a core-shell geometry to simultaneously produce XEOL,XEPL,as well as photon upconversion and downshifting,enabling emission at multiple wavelengths with a varying time scale profile.The review ends with a discussion of the existing challenges for advancing this field,and presents our subjective insight into areas of further multidisciplinary opportunities.
