Photon up-converting (Yb,Er)(2)O-3 thin films by atomic layer deposition



: Tuomisto M, Giedraityte Z, Karppinen M, Lastusaari M

Publisher: WILEY-V C H VERLAG GMBH

: 2017

: physica status solidi (RRL) - Rapid Research Letters

: PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS

: PHYS STATUS SOLIDI-R

: ARTN 1700076

: 11

: 6

: 4

: 1862-6254

DOI: https://doi.org/10.1002/pssr.201700076


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.



Last updated on 2024-26-11 at 22:15