Journal Article10.1002/PPSC.201800462
High Quantum Yield Single-Band Green Upconversion in La2O3:Yb3+, Ho3+ Microcrystals for Anticounterfeiting and Plastic Recycling
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Abstract: Single‐band green upconversion (UC) with high green purity and color stability is urgently required for plastic recycling and anticounterfeiting. However, it is very difficult to obtain single‐band green emission for benchmark Yb3+/Er3+ activated UC materials (such as NaYF4:Yb3+,Er3+) due to the strong accompanying red UC. Herein, highly efficient and stable single‐band green UC is reported in La2O3:Yb3+/Ho3+ (LYH) microcrystals with record high absolute UC quantum yield (UCQY) of 2.6% for single‐band green UC. LYH yields pure green UC with large and stable intensity ratio, IGreen/IRed ≈ 18. LYH presents not only higher UCQY for a single‐band green UC but also much more pure and stable green UC than the benchmark UC materials such as NaYF4:Yb3+,Er3+ and Gd2O2S:Yb3+,Er3+. These results suggest that the newly developed LYH can, in principle, be promising for anticounterfeiting and plastic recycling. Its proof‐of‐concept is demonstrated as a security label based on a transparent institute logo.
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Citations
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References
Binary rare earth oxides
吟也 足立,今中 信人,Zhen Chuan Kang +2 more
- 01 Jan 2005
TL;DR: In this article, the authors present an approach for the analysis of rare earth oxides based on the Ln2O3-CO2-H2O-CO 2 system.
249
Enhancing Solar Cell Efficiency Using Photon Upconversion Materials
TL;DR: Recent progress on varying types of efficient upconversion materials as well as their outstanding uses in a series of solar cells, including silicon solar cells (crystalline and amorphous), gallium arsenide (GaAs) solar Cells, dye-sensitizedSolar cells, and other types ofSolar cells are summarized.
179
•Book
Photon Upconversion Nanomaterials
Fan Zhang
- 11 Dec 2014
TL;DR: This book discusses Upconversion luminescence of Lanthanide ions doped nanocrystals, upconversion nanoparticles for thermal sensing, and the applications of these materials in Bioassay and other applications.
177
Local symmetric distortion boosted photon up-conversion and thermometric sensitivity in lanthanum oxide nanospheres
TL;DR: Results open a promising avenue for realizing highly sensitive thermometry with a large signal-to-noise ratio in sub-tissues via finely tailoring the local site symmetry.
153
Power-dependent upconversion quantum yield of NaYF4:Yb3+,Er3+ nano- and micrometer-sized particles – measurements and simulations
TL;DR: The results suggest an overestimation of the contribution of the purple and an underestimation of that of the red emission of β-NaYF4:Yb3+,Er3+: microparticles by the simulations of the Berry group, which can be used as a guideline to the absolute determination of UCL and ΦUC.
150