PHYSICA B-CONDENSED MATTER
·
2022
·
IF 2.988
Xianzhi Zeng,Haoyi Wu,Junhao Peng,Chuanlong Wang,Guangting Xiong,Yahong Jin,Yihua Hu
The improvement of luminescent properties is important for expanding the application of long afterglow phosphor (LAP). Here, the melilite-type Sr 1·97 MgSi 2 O 7 : Eu 2+ 0.01 , Dy 3+ 0.02 LAP was studied with Bi 3+ as the second co-dopant. Both photoluminescence (PL) and thermoluminescence (TL) were improved in terms of intensity and afterglow lifetime when the doping concentration of Bi 3+ exceeded 2.5 mol%, and the optimized point was 3.5 mol%. As compared to the case of Eu 2+ - Dy 3+ double doping, the improved PL of Eu 2+ - Dy 3+ - Bi 3+ triple doping samples was attributed to better photon absorption . The improved TL and afterglow were attributed to the synergistic strengthening density of the traps by Bi 3+ and the deepening of trapping by Dy 3+ , if their distance was sufficient close. As a result, both TL and afterglow optimized at a concentration of 2 mol% Dy 3+ - 3.5 mol% Bi 3+ coupling.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Photochem
·
2025
·Vol. 5
·期 4
·
IF 2.3
Xiaoman Shi,Huimin Li,Ruiping Deng,Su Zhang,Hongjie Zhang
Long persistent phosphors are widely used in many fields, such as LED, bioimaging, urgent lighting, temperature sensors, etc. Although green and blue long persistent phosphors are well developed, efficient orange-yellow long persistent phosphors are still relatively rare. In this work, a novel orange-yellow long-persistent phosphors Ca2LuScGa2Ge2O12:xPr3+(CLSGGO:xPr3+, x = 0.003, 0.005, 0.01, 0.02, 0.03, 0.04, 0.05) are prepared and systematically investigated through its crystal structural information, photoluminescence, and persistent luminescence properties. Under ultraviolet light excitation, these phosphors exhibit orange-yellow emission stemming from the3P0and1D2multiple electron transitions in the 4f level of Pr3+ion. In addition, the material exhibits bright persistent luminescence. The complex garnet matrix structure of Ca2LuScGa2Ge2O12provides excellent conditions for the formation of traps. Through the testing of thermoluminescence curve and function fitting, the density and depth of traps are studied; also, the storage and release process of carriers in the material are calculated in detail. A reasonable persistent luminescence mechanism is proposed for CLSGGO:0.01Pr3+. This work enriches the research content of photoluminescence and long persistent luminescence of Pr3+-doped garnet-based phosphors and paves the way for the future research of long persistent luminescent materials doped with rare earth ions.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Yingli Wang,Jialong Duan,Yuanyuan Zhao,Benlin He,Zhengbo Jiao,Qunwei Tang
The development of weather-independent photovoltaics is a persistent goal for energy technique. Herein we develop a category of hybridized dye-sensitized solar cells (DSSCs) from cost-effective poly(3,4-ethylenedioxythiophene) (PEDOT) derivate counter electrodes and mesoscopic titanium dioxide/long persistence phosphors ( m -TiO 2 /LPPs) composite photoanodes. Using the solar energy storage and emission performances of LPP phosphors, the final m -TiO 2 /LPPs photoanodes are demonstrated to store unabsorbed incident light and to persistently emit monochromatic light for re-exciting photosensitizers. The optimized photovoltaics yield a maximized power conversion efficiency of 10.07% under simulated sunlight irradiation (100 mW cm −2 , air mass 1.5 global) and durable energy output lasting for hours when ceasing solar illumination. The application of m -TiO 2 /LPP photoanodes in the hybridized DSSCs provides new opportunities of making multi-energy integrated photovoltaics for persistent power generation free of sun illumination.
研究领域:
材料科学
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能源技术
·
光电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2025
·Vol. 131
·期 6
·1-7
·
IF 2.8
Yuan Lifang,Wang Junzhong,Huang Zhijin,Shen Kaixiang
Long afterglow phosphors have garnered significant attention for their ability to emit light long after excitation ceases. Afterglow emission relies on metastable trap levels within the bandgap of the host materials. Effective trap engineering strategies to optimize traps are critical in determining the afterglow performance. In this study, we investigate the codoping of Bi 3+ and Er 3+ into LiTaO 3 to enhance afterglow performance. Through high-temperature solid-state synthesis, a series of LiTaO 3 :x%Bi 3+ , y%Er 3+ (x = 0 or 0.5%, y = 0.1–4.0%) samples were prepared successfully. Structural characterization confirmed the successful incorporation of Bi 3+ and Er 3+ into the Li⁺ sites without disrupting the host lattice. Photoluminescence studies revealed that Bi³⁺ codoping significantly enhances the green emission of Er³⁺, with optimal performance achieved at 1.0% Er 3+ doping. Thermoluminescence (TL) analysis demonstrated the presence of traps with the depth of 0.748 eV, enabling prolonged afterglow emission at room temperature. The afterglow mechanism involves charge carrier storage in traps under UV excitation, followed by thermal release and recombination at luminescent centers, facilitated by energy transfer from Bi 3+ to Er 3+ . This work provides a strategy for designing a long afterglow phosphor through controlled codoping, offering insights into trap engineering and energy transfer processes in perovskite-based luminescent materials.
研究领域:
材料科学
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光学材料
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固体物理
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发光学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
He Zhang,Ting Wang,Weilin Chen
With the reduction of available non-renewable energy sources, the full use of renewable energy is particularly important, especially solar energy. The traditional dye-sensitized solar cells can only work during daytime, but never at night. In this work, H 3 [α-PW 12 O 40 ]·21H 2 O (PW 12 ) is first introduced to the all-weather solar cell as the electronic transmission medium for decreasing the electron recombination caused by the weak fluorescence of the long persistence phosphors (LPPs) at night. Meanwhile, we fabricated an all-weather solar cell for the first time by adding a smaller amount of long persistence phosphors (LPPs) to the photo-anode, which can absorb the solar energy at daytime then transfer the energy to fluorescence at night, so the dye (N719) can absorb the fluorescence produced by LPP to continually generate electricity for achieving the aim of all-weather power generation. In general, our all-weather DSSC yields the maximum photoelectric conversion efficiency (PCE) 6.9% at daytime. The values of J sc , V oc and P max are 0.28 mA cm −2 , 500 mV and 79.8 μW cm −2 at night.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Optical Materials Express
·
2018
·Vol. 8
·期 9
·2823-2831
·
IF 2.566
Rongping Ni,Bin Qian,Chang Liu,Xiaofeng Liu,Jianrong Qiu
Additive manufacturing (AM) techniques allow for the construction of sophisticated and hollow models based on the needs of customers, and they functionalize the raw materials (e.g., metal, polymer and ceramic) by structuring them. Here, we demonstrate a simple method for the realization of a three-dimensional architecture with long afterglow properties by curing organic resin doped with inorganic long persistent phosphors (LPPs) layer by layer through the stereolithography (SLA) technique. In our process, the LPPs made by solid state reaction were incorporated homogenously into a resin matrix and pre-designed 3D structures with the resolution of 0.1 mm were printed out. The high luminescence, considerable decay time and multi-color make these organic/inorganic composites reliable for applications in artifacts, crafts, toys and night indicators. It is also demonstrated that the resin containing SrAl2O4: Eu2+, Dy3+ phosphors can be used for fiber temperature sensing from 40 °C to 70 °C.
研究领域:
材料科学
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增材制造
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光子学
·
复合材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）