TY - JOUR
T1 - Thin film fabrication of upconversion lanthanide-doped NaYF4 by a sol-gel method and soft lithographical nanopatterning
AU - Park, Heeyeon
AU - Yoo, Gang Yeol
AU - Kim, Min Seop
AU - Kim, Kein
AU - Lee, Chiho
AU - Park, Sungnam
AU - Kim, Woong
PY - 2017/12/25
Y1 - 2017/12/25
N2 - 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 ∼ 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.
AB - 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 ∼ 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.
KW - Nanopatterns
KW - NaYF
KW - Soft lithography
KW - Sol-gel
KW - Thin films
KW - Upconversion
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U2 - 10.1016/j.jallcom.2017.09.076
DO - 10.1016/j.jallcom.2017.09.076
M3 - Article
AN - SCOPUS:85029177255
VL - 728
SP - 927
EP - 935
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -