Tunable luminescence of Ce3+/Mn2+-coactivated Ca2Gd8(SiO4)6O2 through energy transfer and modulation of excitation: potential single-phase white/yellow-emitting phosphors

Geng, Dongling; Shang, Mengmeng; Peng, Chong; Cheng, Ziyong; Lin, Jun

doi:10.1039/c1jm11650a

Cited by 279 publications

(128 citation statements)

References 68 publications

Supporting

Mentioning

125

Contrasting

Order By: Relevance

“…yellow emitting phosphor was reported by Zhang et al [17] with carbothermal route using SrCO 3 and CeO 2 as raw materials. Comparing with other synthetic routes (such as, solid-state reaction, ammonothermal method and combustion technique) [4,18,19], carbothermal synthesis was identified as a facile route for preparation of nitrides phosphors by considering of its outstanding advantages in relative low reaction temperature (1400-1600°C), cheap raw materials (oxides or carbonates, SrCO 3 , CaCO 3 , Eu 2 O 3 ) and simple processing [20][21][22]. As one of significant nitride phosphor, CaAlSiN 3 :Eu 2?…”

Section: Introductionmentioning

confidence: 99%

Carbothermal synthesis of CaAlSiN3:Eu2+ red-emitting phosphors and the photoluminescent properties

Chen

Mao

et al. 2015

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

In this work, red-emitting nitride phosphor, CaAlSiN 3 :Eu 2? , was synthesized successfully by carbothermal method using CaH 2 , AlN, Si 3 N 4 , Eu 2 O 3 and graphite powder under the condition of atmospheric pressure with a moderate temperature of 1550°C for 6 h. In particular, graphite powder was employed as efficient and robust reducing agent in an optimal C/O mol ratio of 0.86. The obtained CaAlSiN 3 :Eu 2? phosphors were well crystallized and showed an intense red emission band with peaks in the range of 642-675 nm dependent on the Eu 2? doping concentration. Excellent thermal stability for as-synthesized Ca 1-x AlSiN 3 :xEu 2? (x = 0.02-0.10) phosphors with absolute quantum efficiency about 20 % were demonstrated. These results presented here indicated the promising prospect for this economic and facile carbothermal synthesis route in preparing CaAlSiN 3 :Eu 2? phosphors , and the phosphors are highly promising candidates for warm white LEDs.

show abstract

Section: Introductionmentioning

confidence: 99%

Carbothermal synthesis of CaAlSiN3:Eu2+ red-emitting phosphors and the photoluminescent properties

Chen

Mao

et al. 2015

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

show abstract

“…FEDs must operate at low voltage (<5 kV) and high current density. So the phosphors used in FEDs are required to have high efficiency at low voltages, high resistance to current saturation, long service time, and good chromaticity [2][3][4]. Many sulfide and oxide phosphors, such as, ZnS:Cu,Au,Al, SrGa 2 S 4 :Eu 3+ , and Y 2 O 3 :Eu 3+ , have been explored as possible low-voltage excited phosphors.…”

Section: Introductionmentioning

confidence: 99%

MSi2O2−δN2+2/3δ:Eu (M=Sr, Ba) phosphors for field emission displays

Song

Zou

et al. 2012

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…8(c)) the near white-light emission was achieved due to the equal contribution of intensities of red, orange and green emissions, which was supported by the efficient energy transfer from Tb 3+ to Eu 3+ . Excitation spectra for KCa 4 Fig. 8(d).…”

Section: Photoluminescence Of Eu 3+ Tb 3+ Singly and Codoped Kca 4 mentioning

confidence: 99%

“…Being mercury-free, they are expected to be a viable replacement for conventional luminescent and fluorescent lamps in the near future. [1][2][3][4][5][6] One of the most fashionable approaches to produce white light is uniting a blue InGaN based LED with a broadband yellow-emitting Y 3 Al 5 O 12 :Ce 3+ (YAG) phosphor. However, this system lacks thermal stability at higher temperatures above 150 o C. Also, the resultant white light exhibits low color rendering index (R a ) due to lack of individual blue, red and green region colors.…”

Section: Introductionmentioning

confidence: 99%

KCa4(BO3)3:Ln3+ (Ln = Dy, Eu, Tb) phosphors for near UV excited white–light–emitting diodes

et al. 2013

View full text Add to dashboard Cite

A series of doped KCa 4 (BO 3 ) 3 :Ln 3+ (Ln: Dy, Eu and Tb) compositions were synthesized by solid-state reaction method and their photoluminescent properties were systematically investigated to ascertain their suitability for application in white light emitting diodes. The X-ray diffraction (XRD) and nuclear magnetic resonance (MAS-NMR) data indicates that Ln 3+ -ions are successfully occupied the noncentrosymmetric Ca 2+ sites, in the orthorhombic crystalline phase of KCa 4 (BO 3 ) 3 having space group Ama2, without affecting the boron chemical environment. The present phosphor systems could be efficiently excitable at the broad UV wavelength region, from 250 to 350 nm, compatible to the most commonly available UV light-emitting diode (LED) chips. Photoluminescence studies revealed optimal near white-light emission for KCa 4 (BO 3 ) 3 with 5 wt.% Dy 3+ doping, while warm white-light (CIE; X = 0.353, Y = 0.369) is obtained at 1wt.% Dy 3+ ion concentration. The principle of energy transfer between Eu 3+ and Tb 3+ also demonstrates the potential white-light from KCa 4 (BO 3 ) 3 :Eu 3+ ,Tb 3+ phosphor. Whereas, single Tb 3+ and Eu 3+ -doped systems showed bright green (Tb 3+ ) and red (Eu 3+ ) emissions, respectively. Having structural flexibility along with remarkable chemical/thermal stability and suitable quantum efficiency these phosphors can be promising candidates as white-light-emitter for near UV LEDs.

show abstract

Tunable luminescence of Ce3+/Mn2+-coactivated Ca2Gd8(SiO4)6O2 through energy transfer and modulation of excitation: potential single-phase white/yellow-emitting phosphors

Cited by 279 publications

References 68 publications

Carbothermal synthesis of CaAlSiN3:Eu2+ red-emitting phosphors and the photoluminescent properties

Carbothermal synthesis of CaAlSiN3:Eu2+ red-emitting phosphors and the photoluminescent properties

MSi2O2−δN2+2/3δ:Eu (M=Sr, Ba) phosphors for field emission displays

KCa4(BO3)3:Ln3+ (Ln = Dy, Eu, Tb) phosphors for near UV excited white–light–emitting diodes

Contact Info

Product

Resources

About