Resonance in Er3+ Upconversion Excitation

Krämer, Karl (2017). Resonance in Er3+ Upconversion Excitation. Journal of luminescence, 189, pp. 78-83. Elsevier 10.1016/j.jlumin.2016.11.056

[img] Text
275_Er_UC_JLumin.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (835kB)
[img]
Preview
Text
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)

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

Actions (login required)

Edit item Edit item
Provide Feedback