The role played by dopant ions for the production of broadband white light emission from metal oxide nano-powders under laser diode excitation

Bílír, Gökhan; Eryürek, Gönül

doi:10.1016/j.ceramint.2015.12.163

Cited by 15 publications

(7 citation statements)

References 24 publications

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“…8 and 12)), strong pressure dependence, slow rise times, photoconductivity and excitation threshold, i.e., strong non-linear behaviour above a certain excitation power. 7,8,10,14,15 Neodymium-doped materials were described as capable of generating LIWE, such as Y 2 O 3 :Nd 3+ , 16 Y 2 Si 2 O 7 :Nd 3+ (ref. 17 and 18) and NdAlO 3 .…”

Section: Introductionmentioning

confidence: 99%

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Laser induced white emission generation from La_1−xNd_xAlO₃ nanocrystals

et al. 2023

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Section: Introductionmentioning

confidence: 99%

“…Neodymium-doped materials were described as capable of generating LIWE, such as Y 2 O 3 :Nd 3+ , 16 Y 2 Si 2 O 7 :Nd 3+ (ref. 17 and 18) and NdAlO 3 .…”

Section: Introductionmentioning

confidence: 99%

Laser induced white emission generation from La_1−xNd_xAlO₃ nanocrystals

et al. 2023

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“…The IOB could be arisen within the materials via positive‐feedback absorption amplification process resulting from the laser heating. The white light emission has been reported in the various materials by considering the heat associated or incandescent‐like phenomenon . J. Wang and P. A. Tanner have reported white light emission from host Yb 2 O 3 only in vacuum (0.02 mba) .…”

Section: Introductionmentioning

confidence: 99%

Host‐Sensitized Continuum‐Broad‐Band White‐Light Emitting Yb₂O₃:Er³⁺ Phosphor under CW‐NIR Light Absorption

2019

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Single cubic phase Yb2O3:Er3+ phosphors have been synthesized via solid state reaction technique and characterized by X‐ray diffraction (XRD) and Field emission scanning electron microscopy (FE‐SEM) analysis. An unusual continuum broad band white colour upconversion (UC) emission has been observed under 980 nm continuous wave (CW) near infrared (NIR) laser diode excitation. Interestingly, the phosphor shows characteristic erbium ion transitions at low pump power, but at high pump power heat associated continuum broad band emission was realized. The continuum broad band emission was explained on the basis of energy level diagram, laser induced pump power dependence and blackbody radiation theory. The heat associated/incandescence‐like light is originated due to heating induced by the nonradiative relaxation followed by sensitization (Yb → Er) and Yb−Yb dimer formation. The synthesized phosphor emits effective broad band white colour emission under high pump power and colour co‐ordinates (white colour: 0.34, 0.32) were located in the chromaticity diagram. Intrinsic optical bistability (IOB) behavior shows the hysteresis‐like loop originated upon variation in the laser pump power. The observed high temperature at point of irradiation of the prepared nanocrystalline phosphor is about ∼ 2442 K at 1430 mW, which is high as compare to tungsten bulb (2400 K for 100 W). The developed phosphors can be useful in white light production, solar cell efficiency enhancement, switchable bistable and as light to heat converter.

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“…It consists on surface layer enriching with alloying elements and structure changes. The alloying additions used in the laser alloying process are usually light metal alloys, steels, super alloys, reinforced with carbides, nitrides and borides [8][9][10][11][12][13][14][15][16]. The chemical composition of the surface layer, as well as the mechanical properties, are different from those of the initial alloying material.…”

Section: Introductionmentioning

confidence: 99%

“…The structure investigation and improvement of mechanical properties are an aim of this research, and the improvement of surface layer hardness is an important factor for practice applications. In case of CAE PvD and PA CvD process on the surface of other steel grades and light cast alloys to increase the low stiffness of the substrate material [6][7][8]10,12,[16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Effect of Laser Feeding on Heat Treated Aluminium Alloy Surface Properties

Labisz

Tański

Janicki

et al. 2016

Archives of Metallurgy and Materials

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In this paper are presented the investigation results concerning microstructure as well as mechanical properties of the surface layer of cast aluminium-silicon-copper alloy after heat treatment alloyed and/ or remelted with SiC ceramic powder using High Power Diode Laser (HPDL). For investigation of the achieved structure following methods were used: light and scanning electron microscopy with EDS microanalysis as well as mechanical properties using Rockwell hardness tester were measured. By mind of scanning electron microscopy, using secondary electron detection was it possible to determine the distribution of ceramic SiC powder phase occurred in the alloy after laser treatment. After the laser surface treatment carried out on the previously heat treated aluminium alloys, in the structure are observed changes concerning the distribution and morphology of the alloy phases as well as the added ceramic powder, these features influence the hardness of the obtained layers. In the structure, there were discovered three zones: the remelting zone (RZ) the heat influence zone (HAZ) and transition zone, with different structure and properties. In this paper also the laser treatment conditions: the laser power and ceramic powder feed rate were investigated. The surface laser structure changes in a manner, that there zones are revealed in the form of. This carried out investigations make it possible to develop, interesting technology, which could be very attractive for different branches of industry.

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The role played by dopant ions for the production of broadband white light emission from metal oxide nano-powders under laser diode excitation

Cited by 15 publications

References 24 publications

Laser induced white emission generation from La_1−xNd_xAlO₃ nanocrystals

Laser induced white emission generation from La_1−xNd_xAlO₃ nanocrystals

Host‐Sensitized Continuum‐Broad‐Band White‐Light Emitting Yb₂O₃:Er³⁺ Phosphor under CW‐NIR Light Absorption

Effect of Laser Feeding on Heat Treated Aluminium Alloy Surface Properties

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The role played by dopant ions for the production of broadband white light emission from metal oxide nano-powders under laser diode excitation

Cited by 15 publications

References 24 publications

Laser induced white emission generation from La1−xNdxAlO3 nanocrystals

Laser induced white emission generation from La1−xNdxAlO3 nanocrystals

Host‐Sensitized Continuum‐Broad‐Band White‐Light Emitting Yb2O3:Er3+ Phosphor under CW‐NIR Light Absorption

Effect of Laser Feeding on Heat Treated Aluminium Alloy Surface Properties

Contact Info

Product

Resources

About

Laser induced white emission generation from La_1−xNd_xAlO₃ nanocrystals

Laser induced white emission generation from La_1−xNd_xAlO₃ nanocrystals

Host‐Sensitized Continuum‐Broad‐Band White‐Light Emitting Yb₂O₃:Er³⁺ Phosphor under CW‐NIR Light Absorption