Epitaxial KNbO3:Yb3+,Er3+ nanopattern for enhanced upconversion photoluminescence

Heeyeon Park, Kyu Tae Lee, Soon Hong Kwon, In Hwan Ahn, Byunghoon Kim, Doo Hyun Ko, Woong Kim

Research output: Contribution to journalArticle

Abstract

Nanopatterned epitaxial films of upconversion (UC) materials are desirable for various applications such as display lighting, waveguides, and optical imaging. In this study, we demonstrate that a nanopatterned epitaxial film of a UC material can be fabricated by combining a sol–gel process and nanoimprint lithography. An epitaxial KNbO3:Yb3+,Er3+ film is grown on a lattice-matched SrTiO3 single-crystal substrate, which exhibits an approximately 70 times enhanced UC photoluminescence (PL) intensity compared to that of a non-epitaxial KNbO3:Yb3+,Er3+ film grown on a Si substrate. Moreover, the introduction of a nanopattern enhances the UCPL intensity ∼20 times compared to that of a planar film with the same volume of material. Our study paves the way for a better fundamental understanding and expansion in the application of UC materials.

Original languageEnglish
Article number152238
JournalJournal of Alloys and Compounds
Volume813
DOIs
Publication statusPublished - 2020 Jan 15

Fingerprint

Photoluminescence
Epitaxial films
Nanoimprint lithography
Substrates
Crystal lattices
Waveguides
Lighting
Display devices
Single crystals
Imaging techniques

Keywords

  • Epitaxy
  • Nanoimprint
  • Nanopattern
  • Sol–gel
  • Upconversion

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Epitaxial KNbO3:Yb3+,Er3+ nanopattern for enhanced upconversion photoluminescence. / Park, Heeyeon; Lee, Kyu Tae; Kwon, Soon Hong; Ahn, In Hwan; Kim, Byunghoon; Ko, Doo Hyun; Kim, Woong.

In: Journal of Alloys and Compounds, Vol. 813, 152238, 15.01.2020.

Research output: Contribution to journalArticle

Park, Heeyeon ; Lee, Kyu Tae ; Kwon, Soon Hong ; Ahn, In Hwan ; Kim, Byunghoon ; Ko, Doo Hyun ; Kim, Woong. / Epitaxial KNbO3:Yb3+,Er3+ nanopattern for enhanced upconversion photoluminescence. In: Journal of Alloys and Compounds. 2020 ; Vol. 813.
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