A1 Refereed original research article in a scientific journal
Photon up-converting (Yb,Er)(2)O-3 thin films by atomic layer deposition
Authors: Tuomisto M, Giedraityte Z, Karppinen M, Lastusaari M
Publisher: WILEY-V C H VERLAG GMBH
Publication year: 2017
Journal: physica status solidi (RRL) - Rapid Research Letters
Journal name in source: PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
Journal acronym: PHYS STATUS SOLIDI-R
Article number: ARTN 1700076
Volume: 11
Issue: 6
Number of pages: 4
ISSN: 1862-6254
DOI: https://doi.org/10.1002/pssr.201700076
Abstract
We report up-converting (Yb,Er)(2)O-3 thin films grown with the atomic layer deposition (ALD) technique. The films are crystalline and show a homogeneous morphology with a roughness less than 1 nm for 40 nm thick films. High-intensity near-infrared (NIR) to green and red two-photon up-conversion emission is obtained with 974 nm excitation through an absorption by Yb3+, followed by a Yb3+-Er3+ energy transfer and emission from Er3+. The ALD technique promises to be excellent for producing up-converting films for many applications such as near-infrared radiation absorbing layers for solar cells and sensors in point-of-care biomedical diagnostics.[GRAPHICS]Schematic picture of the ALD-grown (Yb,Er)(2)O-3 thin film including the up-conversion emission spectra.
We report up-converting (Yb,Er)(2)O-3 thin films grown with the atomic layer deposition (ALD) technique. The films are crystalline and show a homogeneous morphology with a roughness less than 1 nm for 40 nm thick films. High-intensity near-infrared (NIR) to green and red two-photon up-conversion emission is obtained with 974 nm excitation through an absorption by Yb3+, followed by a Yb3+-Er3+ energy transfer and emission from Er3+. The ALD technique promises to be excellent for producing up-converting films for many applications such as near-infrared radiation absorbing layers for solar cells and sensors in point-of-care biomedical diagnostics.[GRAPHICS]Schematic picture of the ALD-grown (Yb,Er)(2)O-3 thin film including the up-conversion emission spectra.
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