Influence of graphene flakes on upconversion spectra of Y2O3:Yb3+,Er3+ nanocrystalline powders
Source abstract
Abstract
Abstract The effect of graphene flakes (GF) admixing to the Er3+,Yb3+:Y2O3 nanocrystalline powders on upconversion (UC) emission was investigated. It was found that GFs significantly reduce not only the overall intensity of UC transitions but also change their intensity distribution. In particular the red band corresponding to the 2F9/2 → 4I15/2 transition decreases in comparison to the green band associated with the 2H11/2 → 4I15/2 and 4S3/2 → 4I15/2 transitions which were significantly weakened. The green to red ratio of transition band intensities (G/R) varied with a content of graphene flakes. It was observed that G/R ratio was dependent on excitation laser power. For larger concentration of GFs there was observed the broadband white emission centered at 650 nm that increased exponentially with excitation power with simultaneous dumping of UC transitions.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Radiation Detection and Scintillator Technologies · Nuclear materials and radiation effects
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (30)
Show source-provided references
1. Upconversion processes in coupled ion systems10.1016/0022-2313(90)90189-I ↗
2. Auzel · 2003
3. Upconversion nanoparticles in biological labeling, imaging, and therapy10.1039/c0an00144a ↗
4. Upconversion nanoparticles: a versatile solution to multiscale biological imaging10.1021/bc5003967 ↗
5. Theranostic upconversion nanoparticles (I)10.7150/thno.6382 ↗
6. A broadening temperature sensitivity range with a core–shell YbEr@YbNd double ratiometric optical nanothermometer10.1039/C5NR08223D ↗
7. Sensitivity of a nanocrystalline luminescent thermometer in high and low excitation density regimes10.1021/acs.jpcc.6b01636 ↗
8. Size dependent sensitivity of Yb 3+, Er 3+ up-converting luminescent nano-thermometers10.1039/C7TC02322G ↗
9. Upconversion for photovoltaics - a review of materials, devices and concepts for performance enhancement10.1002/adom.201500024 ↗
10. Upconversion nanophosphors for solar cell applications10.1039/C4RA03919J ↗
11. Perspectives of multiscale rare earth crystal materials10.1039/C8CE02199F ↗
12. Synthesis of NaYF4:Nd@NaLuF4@SiO2@PS colloids for fluorescence imaging in the second biological window10.1016/j.jre.2017.07.009 ↗
13. Core-shell structured up-conversion luminescent and mesoporous NaYF 4:Yb3+/Er3+@ n SiO2@ m SiO 2 nanospheres as carriers for drug delivery10.1021/jp203039t ↗
14. Upconverting nanoparticles: assessing the toxicity10.1039/C4CS00177J ↗
15. Upconversion 3D printed composite with multifunctional applications for tissue engineering and photodynamic therapy
16. Novel luminescent PLA/MgAl2O4:Sm3+ composite filaments for 3D printing application10.1016/j.matlet.2018.11.066 ↗
17. Phosphor powders‐incorporated polylactic acid polymeric composite used as 3D printing filaments with green luminescence properties10.1002/app.48644 ↗
18. Synthesis and luminescence properties of CsPbX 3 @Uio-67 composites toward stable photoluminescence convertors10.1021/acs.inorgchem.8b03295 ↗
19. Fabrication of a dual-emitting dye-encapsulated metal-organic framework as a stable fluorescent sensor for metal ion detection10.1039/C9DT01125K ↗
20. Encapsulation of CH3NH3PbBr3 perovskite quantum dots in MOF-5 microcrystals as a stable platform for temperature and aqueous heavy metal ion detection10.1021/acs.inorgchem.8b00355 ↗
21. Electric field effect in atomically thin carbon films10.1126/science.1102896 ↗
22. Graphene-enhanced Raman scattering from the adenine molecules10.1186/s11671-016-1418-5 ↗
23. Enhancement of the upconversion emission by visible-to-near-infrared fluorescent graphene quantum dots for miRNA detection10.1021/acsami.6b02361 ↗
24. Cathodoluminescent properties of Tb3+-doped yttria nanocrystallites10.1016/S1002-0721(08)60291-4 ↗
25. Laser induced white lighting of graphene foam10.1038/srep41281 ↗
26. Laser-induced white-light emission from graphene ceramics-opening a band gap in graphene10.1038/lsa.2015.10 ↗
27. Power dependence of upconversion luminescence in lanthanide and transition-metal-ion systems10.1103/PhysRevB.61.3337 ↗
28. Excellent optical thermometry based on upconversion emission in SrMoO 4 :Er 3+ phosphor
29. Multiband Monte Carlo modeling of upconversion emission in sub 10 nm β-NaGdF 4: Yb 3+, Er 3+ nanocrystals—effect of Yb 3+ content10.1063/1.4989473 ↗
30. Upconversion luminescence and favorable temperature sensing performance of eulytite-type Sr 3 Y(PO 4) 3 :Yb 3+/Ln 3+ phosphors (Ln=Ho, Er, Tm)10.1080/14686996.2019.1659090 ↗