NaGd(WO4)2:Yb3+/Er3+ phosphors: hydrothermal synthesis, optical spectroscopy and green upconverted temperature sensing behavior

Temperature dependence of the green UC luminescence spectra of NGW:Yb3+/Er3+ phosphor under 980 nm excitation (the spectra are normalized to the emission peak at 554 nm. The excitation power density is 3 W cm−2).

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Excitation power density and temperature dependence of photoluminescence study on electron-irradiated GaAs middle cell of GaInP/GaAs/Ge triple-junction solar cell

Journal of Physics Conference Series ◽

10.1088/1742-6596/1765/1/012001 ◽

2021 ◽

Vol 1765 ◽

pp. 012001

Author(s):

G Yan ◽

Y Y Liu ◽

R Wu ◽

J Liu ◽

J L Wang ◽

...

Keyword(s):

Solar Cell ◽

Temperature Dependence ◽

Power Density ◽

Triple Junction ◽

Excitation Power ◽

Excitation Power Density ◽

Photoluminescence Study ◽

Junction Solar Cell

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Influence of excitation power density on temperature dependencies of NaYF4: Yb, Er nanoparticles luminescence spectra

10.1117/12.2269297 ◽

2017 ◽

Author(s):

Sergey O. Ustalkov ◽

Ekaterina A. Kozlova ◽

Olga A. Savenko ◽

Ammar H. M. Mohammed ◽

Vyacheslav I. Kochubey ◽

...

Keyword(s):

Power Density ◽

Excitation Power ◽

Luminescence Spectra ◽

Excitation Power Density

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Optical temperature sensing properties of Yb3+–Er3+ co-doped NaLnTiO4 (Ln = Gd, Y) up-conversion phosphors

RSC Advances ◽

10.1039/c4ra11771a ◽

2015 ◽

Vol 5 (2) ◽

pp. 1385-1390 ◽

Cited By ~ 64

Author(s):

Dong He ◽

Chongfeng Guo ◽

Sha Jiang ◽

Niumiao Zhang ◽

Changkui Duan ◽

...

Keyword(s):

Temperature Dependence ◽

Emission Peak ◽

Temperature Sensing ◽

Luminescence Spectra ◽

Temperature Dependent ◽

Present Sample ◽

Sensing Properties ◽

Intense Emission ◽

Co Doped

Temperature dependence of the green UC luminescence spectra of NaYTiO4: 0.14Yb3+, 0.05Er3+ under 980 nm excitation (the spectra are normalized to the most intense emission peak at 551 nm) and temperature-dependent sensitivity for the present sample.

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NIR light guided enhanced photoluminescence and temperature sensing in Ho3+/Yb3+/Bi3+ co-doped ZnGa2O4 phosphor

Scientific Reports ◽

10.1038/s41598-021-83644-9 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Monika ◽

Ram Sagar Yadav ◽

Anita Rai ◽

Shyam Bahadur Rai

Keyword(s):

Power Density ◽

Green Light ◽

Green Emission ◽

Excitation Power ◽

Absolute Temperature ◽

Temperature Sensing ◽

Excitation Power Density ◽

Enhanced Photoluminescence ◽

Nir Light ◽

Co Doped

AbstractThe conversion of NIR light into visible light has been studied in Ho3+/Yb3+/Bi3+ co-doped ZnGa2O4 phosphor for the first time. The crystallinity and particles size of the phosphor increase through Bi3+ doping. The absorption characteristics of Ho3+, Yb3+ and Bi3+ ions are identified by the UV–vis-NIR measurements. The Ho3+ doped phosphor produces intense green upconversion (UC) emission under 980 nm excitations. The emission intensity ~ excitation power density plots show contribution of two photons for the UC emissions. The UC intensity of green emission is weak in the Ho3+ doped phosphor, which enhances upto 128 and 228 times through co-doping of Yb3+ and Yb3+/Bi3+ ions, respectively. The relative and absolute temperature sensing sensitivities of Ho3+/Yb3+/5Bi3+ co-doped ZnGa2O4 phosphor are calculated to be 13.6 × 10−4 and 14.3 × 10−4 K−1, respectively. The variation in concentration of Bi3+ ion and power density produces excellent color tunability from green to red via yellow regions. The CCT also varies with concentration of Bi3+ ion and power density from cool to warm light. The color purity of phosphor is achieved to 98.6% through Bi3+ doping. Therefore, the Ho3+/Yb3+/Bi3+:ZnGa2O4 phosphors can be suitable for UC-based color tunable devices, green light emitting diodes and temperature sensing.

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The sensitization of laser-induced heat of Er3+ doped Y2O3 nanocrystals by codoped with Mn2+

International Journal of Modern Physics B ◽

10.1142/s0217979215501581 ◽

2015 ◽

Vol 29 (22) ◽

pp. 1550158

Author(s):

Yunfeng Bai ◽

Minjie Luan ◽

Linjun Li ◽

Zhelong He ◽

Dongyu Li

Keyword(s):

Power Density ◽

Thermal Emission ◽

Energy Levels ◽

Excitation Power ◽

Threshold Power ◽

Excitation Power Density ◽

Ir Laser ◽

Order Of Magnitude ◽

Low Threshold ◽

Density Threshold

Low threshold power density cw laser-induced heat has been observed in [Formula: see text] and [Formula: see text] codoped [Formula: see text] nanocrystals under excitation by a 980 nm IR laser. Codoped [Formula: see text] remarkably reduces the power density threshold of laser-induced heat compared with [Formula: see text] doped [Formula: see text] nanocrystals. When the excitation power density exceed [Formula: see text], [Formula: see text] codoped [Formula: see text] nanocrystals emit strong blackbody radiation. The thermal emission of [Formula: see text] should originate from the multiphonon relaxation between neighboring energy levels. One additional UC-PL enhancement is observed. The UC-PL intensity can be enhanced by an order of magnitude through high temperature calcination caused by light into heat.

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