Krämer, Karl (2017). Resonance in Er3+ Upconversion Excitation. Journal of luminescence, 189, pp. 78-83. Elsevier 10.1016/j.jlumin.2016.11.056
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Krämer_J_Luminesc_Er_upconversion.pdf - Accepted Version Available under License Creative Commons: Attribution-Noncommercial-No Derivative Works (CC-BY-NC-ND). Download (415kB) | Preview |
Upconversion(UC)processesarediscussedontheexamplesofexcitedstateabsorption(ESA)inLaCl3: 1%
Er3þ for 980nmexcitationandenergytransferupconversion(ETU)in β-NaYF4: 20%Er3þ for 1523nm
excitation.Thecrucialimportanceofresonanceisdemonstratedforone-andtwo-colorexcitationsin
LaCl3:Er.ForESAtheexcitationspectraareconvolutionsoftheindividualexcitationstepsandtheUC
luminescence intensityshowsalineardependenceontheexcitationpowerforeachstep.Forone-color
excitedESAandETUinthelowpowerlimit,theexponentofthepowerdependenceisequaltothe
number ofexcitationsteps.Theexponentisreducedduetosaturationeffectsforhighpowerexcitation.
The ETUexcitationspectraresemblethegroundstateabsorptionasshownfor β-NaYF4:Er.Uponbroad-
band excitationbysub-Si-band-gapinfraredlight β-NaYF4:Er showsUCluminescencemainlyfromthe
4I11/2 state around980nmwhichefficiently excitesaSisolarcell.ThisErUCluminescenceistwoorders
of magnitudemoreintensethanthatofotherrareearthionsunderthesameexperimentalconditions.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP) |
UniBE Contributor: |
Krämer, Karl |
Subjects: |
500 Science > 540 Chemistry |
ISSN: |
0022-2313 |
Publisher: |
Elsevier |
Funders: |
[42] Schweizerischer Nationalfonds ; [103] European Commission FP7 |
Language: |
English |
Submitter: |
Karl Krämer |
Date Deposited: |
29 Nov 2017 11:04 |
Last Modified: |
05 Dec 2022 15:08 |
Publisher DOI: |
10.1016/j.jlumin.2016.11.056 |
BORIS DOI: |
10.7892/boris.107305 |
URI: |
https://boris.unibe.ch/id/eprint/107305 |
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