Enhancement of Long-Persistence by Ce Co-Doping in CaS:Eu[sup 2+], Tm[sup 3+] Red Phosphor

2006 ◽  
Vol 153 (11) ◽  
pp. H198 ◽  
Author(s):  
Dongdong Jia
Keyword(s):  
Red Phosphor ◽  
Co Doping

scholarly journals Strongly enhanced luminescence of Sr4Al14O25:Mn4+phosphor by co-doping B3+and Na+ions with red emission for plant growth LEDs

RSC Advances ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 1469-1476 ◽  
Author(s):  
Jiaqi Long ◽  
Xuanyi Yuan ◽  
Chaoyang Ma ◽  
Miaomiao Du ◽  
Xiaoli Ma ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Plant Growth ◽  
Emission Spectrum ◽  
Chlorophyll B ◽  
Red Phosphor ◽  
Red Emission ◽  
Co Doping ◽  
Na Ions ◽  
Enhanced Luminescence ◽  
Blue Chip

(a) Emission spectrum of LEDs fabricated with 445 nm blue chip and Sr2Si5N8:Eu2+red phosphor. (b) Emission spectrum of LEDs fabricated with 445 nm blue chip and Sr4Al14O25:Mn4+phosphor. (c and d) Absorption spectrum of chlorophyll-b and chlorophyll-a.

Controllable site occupation of Eu in intricate superstructure of perovskite Sr3Al2O6: Eu, Dy, Li to produce red luminescence

2018 ◽  
Vol 11 (01) ◽  
pp. 1850012 ◽  
Author(s):  
Mei Zhu ◽  
Yunfei Tian ◽  
Jie Chen ◽  
Mi Fei ◽  
Liangrui He ◽  
...  
Keyword(s):  
Light Emission ◽  
Sol Gel ◽  
Red Light ◽  
Manufacturing Cost ◽  
Red Phosphor ◽  
Light Emitting ◽  
Site Occupation ◽  
Co Doping ◽  
Red Luminescence ◽  
White Light Emitting Diodes

An oxide red phosphor, with outstanding superiority in manufacturing cost, is particular desired for white light-emitting diodes (LEDs). In this work, a strategy to controllable site occupation of Eu in Sr3Al2O6 to give red light emission was employed with a three-step route: the combustion of sol–gel to prepare superfine precursor, the solid-sate reaction of precursor to incorporate Eu into small voids, and a second reduction in 25%H[Formula: see text]75%N2 atmosphere. Accordingly, a new red phosphor of Sr3Al2O6:Eu,Dy,Li was developed. The results shows the red luminescence of Sr3Al2O6:Eu could be improved by doping Dy[Formula: see text] and be further improved by co-doping Li[Formula: see text]. The red luminescence involves the [Formula: see text]-[Formula: see text] transition of Eu[Formula: see text] and the auto-ionization of electron from Eu[Formula: see text] to conduction band. Dy[Formula: see text] acts as a trap center of the thermally released electrons then with electrons returned to the 4[Formula: see text] ground state of Eu[Formula: see text], red light was emitted. The co-substitution of Sr[Formula: see text]–Sr[Formula: see text] by Dy[Formula: see text]–Li[Formula: see text] is helpful to balance defects and improve crystallization.

scholarly journals Enhanced luminescence of a new red phosphor Na13Sr2Ta2(PO4)9:Eu3+ by co-doping charge compensators Li+/Na+/K+

2020 ◽  
Vol 220 ◽  
pp. 116976 ◽  
Author(s):  
Ya-Nan Li ◽  
Dan Zhao ◽  
Lin-Ying Shi ◽  
Shao-Jie Dai ◽  
Yan-Ping Fan ◽  
...  
Keyword(s):  
Red Phosphor ◽  
Co Doping ◽  
Enhanced Luminescence

Enhanced long persistence of Sr2SnO4:Sm3+ red phosphor by co-doping with Dy3+

2011 ◽  
Vol 46 (4) ◽  
pp. 627-629 ◽  
Author(s):  
Xue Yu ◽  
Xuhui Xu ◽  
Jianbei Qiu
Keyword(s):  
Red Phosphor ◽  
Co Doping

Significant improved quantum yields of CaAl12O19:Mn4+ red phosphor by co-doping Bi3+ and B3+ ions and dual applications for plant cultivations

2018 ◽  
Vol 201 ◽  
pp. 314-320 ◽  
Author(s):  
Yuejun Zhu ◽  
Zhongxian Qiu ◽  
Bingyan Ai ◽  
Yiting Lin ◽  
Wenli Zhou ◽  
...  
Keyword(s):  
Quantum Yields ◽  
Red Phosphor ◽  
Co Doping

Single-electron sensitivity with a lens-coupled CCD camera

1993 ◽  
Vol 51 ◽  
pp. 642-643
Author(s):  
G.Y. Fan ◽  
Bruce Mrosko ◽  
Mark H. Ellisman
Keyword(s):  
Focal Length ◽  
Thick Layer ◽  
Ccd Camera ◽  
Single Electron ◽  
Bottom Flange ◽  
X Rays ◽  
Red Phosphor ◽  
Ccd Detector ◽  
Lens Assembly ◽  
Efficient Coupling

A lens coupled CCD camera showing single electron sensitivity has been built for TEM applications. The design is illustrated in Fig. 1. The bottom flange of a JEM-4000EX microscope is replaced by a special flange which carries a large rectangular leaded glass window, 22 mm thick. A 20 μm thick layer of red phosphor is coated on the window, and the entire window is sputter-coated with a thin layer of Au/Pt. A two-lens relay system is used to provide efficient coupling between the image on the phosphor scintillator and the CCD imager. An f1.0 lens (Goerz optical) with front focal length 71.6 mm is used as the collector. A mirror prism, of the Amici type, is used to "bend" the optical path by 90° to prevent X-rays which may penetrate the leaded glass from hitting the CCD detector. Images may be relayed directly to the camera (1:1) or demagnified by a factor of up to 3:1 by moving the lens assembly.

Effects of Bi3+ co-doping on structure and luminescence of SrZn2(PO4)2-based phosphor

2020 ◽  
Vol 31 (13) ◽  
pp. 10072-10077 ◽  
Author(s):  
Yongyan Xu ◽  
Kai Zhang ◽  
Chun Chang
Keyword(s):  
Co Doping

Impact of co-doping concentration in copolymer network liquid crystals

2019 ◽  
Vol 46 (10) ◽  
pp. 1485-1493 ◽  
Author(s):  
Fatemeh Jahanbakhsh ◽  
Alexander Lorenz
Keyword(s):  
Liquid Crystals ◽  
Doping Concentration ◽  
Co Doping ◽  
Copolymer Network

Unveiling the Synergic Roles of Mg/Zr Co-Doping on Rate Capability and Cycling Stability of Li4Ti5O12

2019 ◽  
Vol 166 (4) ◽  
pp. A658-A666 ◽  
Author(s):  
Zhenya Wang ◽  
Limei Sun ◽  
Wenyun Yang ◽  
Jinbo Yang ◽  
Kai Sun ◽  
...  
Keyword(s):  
Rate Capability ◽  
Cycling Stability ◽  
Co Doping

Stability and Microstructure Characterization of Barrierless Cu (Sn, C) Films

2014 ◽  
Vol 1052 ◽  
pp. 163-168 ◽  
Author(s):  
Xiao Na Li ◽  
Lu Jie Jin ◽  
Li Rong Zhao ◽  
Chuang Dong
Keyword(s):  
Diffusion Barrier ◽  
Amorphous Layer ◽  
Barrier Effect ◽  
Co Doping ◽  
Cu Alloy ◽  
Large Atom ◽  
Cu Film ◽  
Small Atom ◽  
Lower Resistivity

Thermal stability, adhesion and electronic resistivity of the Cu alloy films with diffusion barrier elements (large atom Sn and small atom C) have been studied. Ternary Cu (0.6 at.% Sn, 2 at.% C) films were prepared by magnetron co-sputtering in this work. The microstructure and resistivity analysis on the films showed that the Cu (0.6 at.% Sn, 2 at.% C) film had better adhesion with the substrate and lower resistivity (2.8 μΩ·cm, after annealing at 600 °C for 1 h). Therefore, the doping of carbon atoms makes less effect to the resistivity by decreasing the amount of the doped large atoms, which results in the decreasing of the whole resistivity of the barrierless structure. After annealing, the doped elements in the film diffused to the interface to form self-passivated amorphous layer, which could further hinder the diffusion between Cu and Si. So thus ternary Cu (0.6 at.% Sn, 2 at.% C) film had better diffusion barrier effect. Co-doping of large atoms and small atoms in the Cu film is a promising way to improve the barrierless structure.

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