Thin film fabrication of upconversion lanthanide-doped NaYF4 by a sol-gel method and soft lithographical nanopatterning
- Authors
- Park, Heeyeon; Yoo, Gang Yeol; Kim, Min-Seop; Kim, Kein; Lee, Chiho; Park, Sungnam; Kim, Woong
- Issue Date
- 25-12월-2017
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- NaYF4; Upconversion; Thin films; Sol-gel; Nanopatterns; Soft lithography
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.728, pp.927 - 935
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 728
- Start Page
- 927
- End Page
- 935
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/81135
- DOI
- 10.1016/j.jallcom.2017.09.076
- ISSN
- 0925-8388
- Abstract
- Lanthanide-doped NaYF4 is one of the most efficient upconversion materials and fabrication of high-quality thin-films of this material would be useful in various applications. However, it has been a great challenge to fabricate thin films and/or nanopatterns of this material. In this work, we demonstrate the successful fabrication of the NaYF4 thin films and nanopatterns via a sol-gel process and soft lithography. Upconversion of 980 nm near-infrared wavelength to various visible wavelengths (yellow, green, blue, etc.) has been realized using dopants and/or multilayered film structures. Nanopatterns enhance the light out-coupling efficiency and thus the upconversion intensity by a factor of similar to 2-3. The fabrication of high-quality films and patterns is enabled by understanding the dependence of the structural, optical, chemical, and thermal properties of the precursor materials on the temperature. Our results will be an important basis for both scientific and technological advances in wavelength conversion in various areas such as displays, optoelectronics, photonics, and photovoltaics. (C) 2017 Elsevier B.V. All rights reserved.
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Collections - College of Science > Department of Chemistry > 1. Journal Articles
- College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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