scholarly journals Controlling red upconversion luminescence in Gd2O3:Yb3+–Er3+nanoparticles by changing the different atmosphere

RSC Advances ◽  
2016 ◽  
Vol 6 (103) ◽  
pp. 101707-101713 ◽  
Author(s):  
Shengjun Zhang ◽  
Jiajia Zhou ◽  
Ruozhen Wu ◽  
Lei Lei ◽  
Zhen Xiao ◽  
...  
Keyword(s):  
Emission Intensity ◽  
Emission Spectroscopy ◽  
Upconversion Luminescence ◽  
Excitation Power ◽  
Luminescence Properties ◽  
Temperature Dependent ◽  
Logarithmic Relationship

Upconversion luminescence properties were investigated by emission intensityvs.excitation power (double logarithmic relationship) and temperature dependent emission spectroscopy.

Enhancing the upconversion luminescence properties of Er3+–Yb3+ doped yttrium molybdate through Mg2+ incorporation: effect of laser excitation power on temperature sensing and heat generation

2019 ◽  
Vol 43 (15) ◽  
pp. 5960-5971 ◽  
Author(s):  
Shriya Sinha ◽  
Manoj Kumar Mahata ◽  
Kaushal Kumar
Keyword(s):  
Heat Generation ◽  
Laser Excitation ◽  
Upconversion Luminescence ◽  
Excitation Power ◽  
Temperature Sensing ◽  
Luminescence Properties

Upconversion luminescence was enhanced by incorporating Mg2+ into Er3+–Yb3+-doped yttrium molybdate and the effect of laser excitation power on temperature sensing and nanoheating was investigated.

Upconversion Luminescence of ZnO-TiO2: Ho3+/Yb3+ Phosphor Powder

2018 ◽  
Vol 922 ◽  
pp. 32-39 ◽  
Author(s):  
Krisana Kobwittaya ◽  
Yushi Oishi ◽  
Toshio Torikai ◽  
Mitsunori Yada ◽  
Takanori Watari
Keyword(s):  
Emission Intensity ◽  
Upconversion Luminescence ◽  
Green Emission ◽  
Excitation Power ◽  
Mixing Ratios ◽  
Two Photon ◽  
Mixing Method ◽  
Photon Process ◽  
Xrd Patterns ◽  
Luminescence Characteristics

Ho3+/Yb3+ co-doped ZnO-TiO2 composite system were synthesized by powder-solution mixing method and their upconversion (UC) luminescence characteristics were investigated under the 980 nm laser excitation. The effect of various ZnO/TiO2 mixing ratios, and Ho3+ and Yb3+ concentrations were also studied. The XRD patterns showed that the product fired at 1300 °C consisted of Zn2TiO4, TiO2, RE2Ti2O7, and RE2TiO5 (RE = Ho3+ and/or Yb3+) phases. The green emission centered at 538 nm wavelength was detected as the strongest emission intensity which it was in accordance with the 5F4,5S2 → 5I8 transition of Ho3+ ion. The emission intensity of the product changed by varying ZnO/TiO2 mixing ratios, and Ho3+ and Yb3+ concentrations. Brightest UC emission was observed in the sample of 1ZnO:1TiO2 (in mole) doped with 0.03 mol% Ho3+, 9 mol% Yb3+ fired at 1300 °C for 1 h. Besides, the dependence of the UC emission intensity on the excitation power indicated that the two-photon process was responsible for this UC system.

Temperature-dependent upconversion luminescence multicolor tuning and temperature sensing of multifunctional β-NaYF4:Yb/Er@ β-NaYF4:Yb/Tm microcrystals

CrystEngComm ◽  
2021 ◽  
Author(s):  
Dandan Ju ◽  
Xiaoli Gao ◽  
Shouchao Zhang ◽  
Yang Li ◽  
Wenjing Cui ◽  
...  
Keyword(s):  
Temperature Sensitivity ◽  
Upconversion Luminescence ◽  
Temperature Sensing ◽  
Luminescence Properties ◽  
Physical Parameters ◽  
Temperature Dependent ◽  
Color Tuning ◽  
Emission Color

Temperature is one of the physical parameters to affect the emission luminescence properties of upconversion (UC) materials. The temperature-dependent emission color tuning and good temperature sensitivity in multifunctional β-NaYF4:Yb/Er@ β-NaYF4:Yb/Tm...

scholarly journals Down-Shifting in the YAM: Ce3+ + Yb3+ System for Solar Cells

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2753
Author(s):  
Bartosz Fetliński ◽  
Sebastian Turczyński ◽  
Michał Malinowski ◽  
Paweł Szczepański
Keyword(s):  
Energy Transfer ◽  
Emission Intensity ◽  
Potential Application ◽  
Single Photon ◽  
Solar Spectrum ◽  
Excitation Power ◽  
Photovoltaic Devices ◽  
Photoluminescence Properties ◽  
System A ◽  
Down Conversion

In this work, we investigate Ce3+ to Yb3+ energy transfer in Y4Al2O9 (YAM) for potential application in solar spectrum down-converting layers for photovoltaic devices. Photoluminescence properties set, of 10 samples, of the YAM host activated with Ce3+ and Yb3+ with varying concentrations are presented, and the Ce3+ to Yb3+ energy transfer is proven. Measurement of highly non-exponential luminescence decays of Ce3+ 5d band allowed for the calculation of maximal theoretical quantum efficiency, of the expected down-conversion process, equal to 123%. Measurements of Yb3+ emission intensity, in the function of excitation power, confirmed the predominantly single-photon downshifting character of Ce3+ to Yb3+ energy transfer. Favorable location of the Ce3+ 5d bands in YAM makes this system a great candidate for down-converting, and down-shifting, luminescent layers for photovoltaics.

Temperature-dependent Upconversion Luminescence of NaYF4:Yb3+,Er3+ Nanoparticles

2013 ◽  
Vol 42 (3) ◽  
pp. 310-312 ◽  
Author(s):  
Junwei Zhao ◽  
Haitao Li ◽  
Qinghui Zeng ◽  
Kai Song ◽  
Xiaofeng Wang ◽  
...  
Keyword(s):  
Upconversion Luminescence ◽  
Temperature Dependent

Controlled synthesis and upconversion luminescence properties of LiYF4:Yb0.2Er0.02nanoparticles

2016 ◽  
Vol 3 (7) ◽  
pp. 075005 ◽  
Author(s):  
Dan Zhang ◽  
Gejihu De ◽  
Lu Zi ◽  
Yueshan Xu ◽  
Songtao Liu
Keyword(s):  
Upconversion Luminescence ◽  
Luminescence Properties ◽  
Controlled Synthesis

Highly enhanced upconversion luminescence in lanthanide-doped active-core/luminescent-shell/active-shell nanoarchitectures

2016 ◽  
Vol 4 (13) ◽  
pp. 2432-2437 ◽  
Author(s):  
Mingye Ding ◽  
Daqin Chen ◽  
Danyang Ma ◽  
Jianbin Dai ◽  
Yuting Li ◽  
...  
Keyword(s):  
Emission Intensity ◽  
Upconversion Luminescence ◽  
Synergistic Action ◽  
Significant Enhancement ◽  
Active Core ◽  
Suppression Effects

Through active-core/luminescent-shell/active-shell engineering in lanthanide-doped fluoride nanocrystals, significant enhancement of UC emission intensity has been successfully realized under the synergistic action of double sensitization and suppression effects.

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