Controlling the white phosphorescence ZnGa2O4 phosphors by surface defects

García, C.R.; Dı́az-Torres, L.A.; Montes, Emilio Fontela; Hirata, G. A.; Bernal‐Alvarado, J.; Gómez-Solís, C.

doi:10.1016/j.ceramint.2018.11.197

Cited by 42 publications

(26 citation statements)

References 36 publications

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“…This is due to the charge transfer state (CTS) transitions of O 2À -Ga 3+ and O 2À -Zn 2+ ions at 254 and 325 nm wavelengths, respectively. 53 This gure also shows that the intensity of the NIR band is also increased in the presence of Li + ions. This veries that the Yb 3+ ion has better absorption cross section in this region.…”

Section: Optical Characterizationmentioning

confidence: 68%

“…Rare earth doped zinc gallate phosphors have been given much interest due to their wide applications in a variety of elds, such as lighting, eld emission display devices (FEDs), and plasma display panels (PDPs). [53][54][55] It contains an optical band gap of the order of 4.4 eV. 56 ZnGa 2 O 4 is known as a self-activated host and it emits blue luminescence without doping any activator ion.…”

Section: Introductionmentioning

confidence: 99%

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Concentration and pump power-mediated color tunability, optical heating and temperature sensing via TCLs of red emission in an Er³⁺/Yb³⁺/Li⁺ co-doped ZnGa₂O₄ phosphor

et al. 2019

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Section: Optical Characterizationmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Concentration and pump power-mediated color tunability, optical heating and temperature sensing via TCLs of red emission in an Er³⁺/Yb³⁺/Li⁺ co-doped ZnGa₂O₄ phosphor

et al. 2019

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“…In the past, ZnGa 2 O 4 was found to be suitable to use in phosphors as a ceramic material. ZnGa 2 O 4 is known to be an intrinsically blue emitter through the transitions of self-activated centers while considering the luminescence characteristics [33,[114][115][116]. However, with the doping of Mn and Cr, this blue emission can be shifted from blue to green and red emission, respectively [73,117,118].…”

Section: Discussionmentioning

confidence: 99%

Zinc Gallium Oxide—A Review from Synthesis to Applications

et al. 2020

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Spinel ZnGa2O4 has received significant attention from researchers due to its wide bandgap and high chemical and thermal stability; hence, paving the way for it to have potential in various applications. This review focuses on its physical, optical, mechanical and electrical properties, contributing to the better understanding of this material. The recent trends for growth techniques and processing in the research and development of ZnGa2O4 from bulk crystal growth to thin films are discussed in detail for device performance. This material has excellent properties and is investigated widely in deep-ultraviolet photodetectors, gas sensors and phosphors. In this article, effects of substrate temperature, annealing temperature, oxygen partial pressure and zinc/gallium ratio are discussed for device processing and fabrication. In addition, research progress and future outlooks are also identified.

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“…This permits large photoluminescence intensity of the lanthanide ions for various exciting applications, such as display devices, field emission display devices (FEDs), temperature sensing, color tunable devices, induced optical heating, bio-imaging, etc 1 – 5 . The ZnGa 2 O 4 is a self-activated photoluminescent material for solid state lighting 6 . The lanthanide-based ZnGa 2 O 4 material gives large photoluminescence of the narrow band emissions 4 , 5 .…”

Section: Introductionmentioning

confidence: 99%

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

Monika

Yadav

Rai³

et al. 2021

Sci Rep

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The 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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Controlling the white phosphorescence ZnGa2O4 phosphors by surface defects

Cited by 42 publications

References 36 publications

Concentration and pump power-mediated color tunability, optical heating and temperature sensing via TCLs of red emission in an Er³⁺/Yb³⁺/Li⁺ co-doped ZnGa₂O₄ phosphor

Concentration and pump power-mediated color tunability, optical heating and temperature sensing via TCLs of red emission in an Er³⁺/Yb³⁺/Li⁺ co-doped ZnGa₂O₄ phosphor

Zinc Gallium Oxide—A Review from Synthesis to Applications

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

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Controlling the white phosphorescence ZnGa2O4 phosphors by surface defects

Cited by 42 publications

References 36 publications

Concentration and pump power-mediated color tunability, optical heating and temperature sensing via TCLs of red emission in an Er3+/Yb3+/Li+ co-doped ZnGa2O4 phosphor

Concentration and pump power-mediated color tunability, optical heating and temperature sensing via TCLs of red emission in an Er3+/Yb3+/Li+ co-doped ZnGa2O4 phosphor

Zinc Gallium Oxide—A Review from Synthesis to Applications

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

Contact Info

Product

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Concentration and pump power-mediated color tunability, optical heating and temperature sensing via TCLs of red emission in an Er³⁺/Yb³⁺/Li⁺ co-doped ZnGa₂O₄ phosphor

Concentration and pump power-mediated color tunability, optical heating and temperature sensing via TCLs of red emission in an Er³⁺/Yb³⁺/Li⁺ co-doped ZnGa₂O₄ phosphor