Controlled synthesis and luminescent properties of assembled spherical YPxV1−xO4:Ln3+ (Ln = Eu, Sm, Dy or Tm) phosphors with high quantum efficiency

RSC Advances ◽  
2015 ◽  
Vol 5 (65) ◽  
pp. 52533-52542 ◽  
Author(s):  
Zhibin An ◽  
Xiuzhen Xiao ◽  
Jun Yu ◽  
Dongsen Mao ◽  
Guanzhong Lu
Keyword(s):  
Energy Transfer ◽  
Hydrothermal Method ◽  
Quantum Efficiency ◽  
Luminescent Properties ◽  
Controlled Synthesis ◽  
High Quantum Efficiency ◽  
High Quantum ◽  
Controlled Morphology

Controlled morphology and energy transfer in assembled spherical YPxV1−xO4:Ln3+ (Ln = Eu, Sm, Dy or Tm) phosphors with higher luminescent quantum efficiency by the EDTA-assisted hydrothermal method.

scholarly journals Controlled Synthesis of Tb3+/Eu3+ Co-Doped Gd2O3 Phosphors with Enhanced Red Emission

Molecules ◽  
2019 ◽  
Vol 24 (4) ◽  
pp. 759 ◽  
Author(s):  
Dong Zhu ◽  
Jinkai Li ◽  
Xiangyang Guo ◽  
Qinggang Li ◽  
Hao Wu ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Emission Intensity ◽  
Phase Variation ◽  
Hydrothermal Condition ◽  
Luminescent Properties ◽  
Excitation Wavelength ◽  
Controlled Synthesis ◽  
Energy Transfer Mechanism ◽  
Hydrothermal Conditions ◽  
Controlled Morphology

(Gd0.93−xTb0.07Eux)2O3 (x = 0–0.10) phosphors shows great potential for applications in the lighting and display areas. (Gd0.93−xTb0.07Eux)2O3 phosphors with controlled morphology were prepared by a hydrothermal method, followed by calcination at 1100 °C. XRD, FE-SEM, PL/PLE, luminescent decay analysis and thermal stability have been performed to investigate the Eu3+ content and the effects of hydrothermal conditions on the phase variation, microstructure, luminescent properties and energy transfer. Optimum excitation wavelength at ~308 nm nanometer ascribed to the 4f8-4f75d1 transition of Tb3+, the (Gd0.93−xTb0.07Eux)2O3 phosphors display both Tb3+and Eu3+ emission with the strongest emission band at ~611 nm. For increasing Eu3+ content, the Eu3+ emission intensity increased as well while the Tb3+ emission intensity decreased owing to Tb3+→Eu3+ energy transfer. The energy transfer efficiencies were calculated and the energy transfer mechanism was discussed in detail. The lifetime for both the Eu3+ and Tb3+ emission decreases with the Eu3+ addition, the former is due to the formation of resonant energy transfer net, and the latter is because of contribution by Tb3+→Eu3+ energy transfer. The phosphor morphology can be controlled by adjusting the hydrothermal condition (reaction pH), and the morphological influence to the luminescent properties (PL/PLE, decay lifetime, etc.) has been studied in detail.

Energy transfer dynamics and time resolved photoluminescence in BaWO4:Eu3+ nanophosphors synthesized by mechanical activation

2017 ◽  
Vol 41 (17) ◽  
pp. 8947-8958 ◽  
Author(s):  
Paramananda Jena ◽  
Santosh K. Gupta ◽  
Narendra Kumar Verma ◽  
Akhilesh Kumar Singh ◽  
R. M. Kadam
Keyword(s):  
Energy Transfer ◽  
Mechanical Activation ◽  
Quantum Efficiency ◽  
Time Resolved ◽  
High Quantum Efficiency ◽  
Red Phosphor ◽  
White Leds ◽  
High Quantum ◽  
Time Resolved Photoluminescence

Red purity and high quantum efficiency of BaWO4:Eu3+ projects it as a new red phosphor for application in white LEDs.

Highly efficient and thermally stable luminescence of Ca3Gd2Si6O18:Ce3+,Tb3+ phosphors based on efficient energy transfer

2020 ◽  
Vol 8 (48) ◽  
pp. 17176-17184
Author(s):  
Dan Wu ◽  
Yu Xiao ◽  
Liangliang Zhang ◽  
Xiaoling Dong ◽  
Shifeng Zhao ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Energy Transfer ◽  
Quantum Efficiency ◽  
Thermally Stable ◽  
Efficient Energy Transfer ◽  
High Quantum Efficiency ◽  
Efficient Energy ◽  
High Quantum ◽  
Highly Efficient

A high quantum efficiency and improved thermal stability can be achieved with the introduction of Tb3+ into Ca3Gd2Si6O18:Ce3+.

Modulation of optical properties of ZnS QDs embedded glasses through aluminum and manganese doping

2021 ◽  
Author(s):  
Kai Li ◽  
Ying Ye ◽  
Wenchao Zhang ◽  
Yuzhou Hu ◽  
Ying Yang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Quantum Efficiency ◽  
High Quantum Efficiency ◽  
Information Display ◽  
Manganese Doping ◽  
High Quantum

Nontoxic cadmium-free ZnS and ZnSe QDs QDs with high quantum efficiency have drawn considerable attention for information display. Applications of ZnS and ZnSe QDs are limited by their short emission...

scholarly journals Highly Efficient Near-Infrared Detector Based on Optically Resonant Dielectric Nanodisks

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 428
Author(s):  
Reza Masoudian Saadabad ◽  
Christian Pauly ◽  
Norbert Herschbach ◽  
Dragomir N. Neshev ◽  
Haroldo T. Hattori ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
High Speed ◽  
Near Infrared ◽  
Infrared Detector ◽  
High Quantum Efficiency ◽  
Fast Detection ◽  
High Quantum ◽  
Resonant Modes ◽  
Infrared Wavelengths ◽  
Dielectric Metasurface

Fast detection of near-infrared (NIR) photons with high responsivity remains a challenge for photodetectors. Germanium (Ge) photodetectors are widely used for near-infrared wavelengths but suffer from a trade-off between the speed of photodetection and quantum efficiency (or responsivity). To realize a high-speed detector with high quantum efficiency, a small-sized photodetector efficiently absorbing light is required. In this paper, we suggest a realization of a dielectric metasurface made of an array of subwavelength germanium PIN photodetectors. Due to the subwavelength size of each pixel, a high-speed photodetector with a bandwidth of 65 GHz has been achieved. At the same time, high quantum efficiency for near-infrared illumination can be obtained by the engineering of optical resonant modes to localize optical energy inside the intrinsic Ge disks. Furthermore, small junction capacitance and the possibility of zero/low bias operation have been shown. Our results show that all-dielectric metasurfaces can improve the performance of photodetectors.

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