Enhanced green emission and thermal stability of Ba3Si6O12N2:Eu2+ by Ce3+/P5+-doping: Unity energy transfer, charge compensation and lattice strain release

AbstractA comparative study of the excitation of luminescence by VUV radiation as well as of thermally and photostimulated luminescence has been carried out for CaSO4:Tb3+ and CaSO4:Gd3+ phosphors, where Na+ or F− ions are used for charge compensation. The distinction in hole processes for the phosphors with Na+ or F− compensators is determined by the differing thermal stability of the holes localized at/near Tb3+Na+ and Gd3+Na+ (up to 100–160 K) or at/near Tb3+F− V Ca and Gd3+F− V Ca centers involving also a cation vacancy (up to 400–550 K). Tunnel luminescence in the pairs of localized electrons and holes nearby Tb3+ or Gd3+ has been detected. The mechanisms of electron-hole, hole-electron and tunnel recombination luminescence as well as a subsequent released energy transfer to RE3+ ions are considered.

Download Full-text

Crystal structure, luminescence, and thermal stability of CsAlSi2O6:Tb3+ phosphors with highly efficient green emission

Materials Research Bulletin ◽

10.1016/j.materresbull.2021.111441 ◽

2021 ◽

pp. 111441

Author(s):

Seiya Shimono ◽

Taichi Izaki ◽

Nagisa Tanaka ◽

Yasushi Nanai ◽

Takaaki Morimoto ◽

...

Keyword(s):

Crystal Structure ◽

Thermal Stability ◽

Green Emission ◽

Highly Efficient ◽

Thermal Stability Of

Download Full-text

Role of lattice strain on thermal stability of a nanocrystalline FeMo alloy

Acta Materialia ◽

10.1016/j.actamat.2009.10.012 ◽

2010 ◽

Vol 58 (3) ◽

pp. 963-966 ◽

Cited By ~ 25

Author(s):

A. Molinari ◽

S. Libardi ◽

M. Leoni ◽

P. Scardi

Keyword(s):

Thermal Stability ◽

Lattice Strain ◽

Thermal Stability Of

Download Full-text

Enhanced red emission and thermal stability of Ca(MoO4)0.8(WO4)0.2:xDy3+, yEu3+ phosphors by charge compensation

Journal of Luminescence ◽

10.1016/j.jlumin.2021.118504 ◽

2022 ◽

Vol 241 ◽

pp. 118504

Author(s):

Zhongxu Han ◽

Shuchen Lü ◽

Qingyu Meng ◽

Mengsi Sun ◽

Yandong Ren

Keyword(s):

Thermal Stability ◽

Charge Compensation ◽

Red Emission ◽

Thermal Stability Of

Download Full-text

Luminescence property, energy transfer and thermal stability of Sr6Ca4(PO4)6F2:Ce3+, Tb3+, Sm3+ for white light emitting diodes

Optik ◽

10.1016/j.ijleo.2019.163424 ◽

2020 ◽

Vol 201 ◽

pp. 163424

Author(s):

Yuebin Li ◽

Zhijun Wang ◽

Zhipeng Wang ◽

Xiangyu Meng ◽

Keliang Qiu ◽

...

Keyword(s):

Thermal Stability ◽

Energy Transfer ◽

White Light ◽

Luminescence Property ◽

Light Emitting Diodes ◽

Light Emitting ◽

White Light Emitting Diodes ◽

Thermal Stability Of

Download Full-text

Tuning luminescence and excellent thermal stability of Gd4.67Si3O13: Bi3+, Eu3+ with energy transfer from Bi3+ to Eu3+

Ceramics International ◽

10.1016/j.ceramint.2020.06.066 ◽

2020 ◽

Vol 46 (14) ◽

pp. 22927-22933

Author(s):

Ye Jin ◽

Ying Wang ◽

Yiping Wang

Keyword(s):

Thermal Stability ◽

Energy Transfer ◽

Excellent Thermal Stability ◽

Thermal Stability Of

Download Full-text

Novel Tunable Green-Red Luminescence in Mn2+ Doped Ca9Tb(PO4)7 Phosphors Based on the Mn2+ Regulation and Energy Transfer

Coatings ◽

10.3390/coatings10100952 ◽

2020 ◽

Vol 10 (10) ◽

pp. 952

Author(s):

Bingwen Yang ◽

Yefeng Feng ◽

Qinghu Zhao ◽

Miao He ◽

Yang Lv

Keyword(s):

Energy Transfer ◽

Green Emission ◽

Energy Transfer Mechanism ◽

Red Emission ◽

Broadband Emission ◽

Characteristic Emission ◽

Potential Applications ◽

Light Excitation ◽

Red Luminescence ◽

Thermal Stability Of

β-Ca3(PO4)2 type phosphors Ca9Tb(PO4)7:Mn2+ were fabricated by high temperature solid state reaction. Under 377 nm light excitation, the Ca9Tb(PO4)7 host displays the green emission attributable to the characteristic emission of Tb3+ ions peaking at 488, 542, 586, and 620 nm, respectively. The red broadband emission is observed when Ca9Tb(PO4)7 is doped with Mn2+ ions. The emission is attributed to the energy transfer from Tb3+ to Mn2+ ions; this facilitates the realization of the tunable green–red emission. The energy transfer mechanism from Tb3+ to Mn2+ is defined as quadrupole–quadrupole interaction. Furthermore, the thermal stability of Ca9Tb(PO4)7:Mn2+ samples has been studied, and it can maintain half the emission intensity exceeding 424 K. This demonstrates their potential applications in white light LEDs (w-LEDs).

Download Full-text