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PHOTONIC CRYSTAL SURFACE ENHANCED UPCONVERSION EMISSION OF YF₃:Yb³⁺, Er³⁺ NANOPARTICLES

BO SHAO

College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China

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ZHENGWEN YANG

College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China

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JUN LI

College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China

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JIAYAN LIAO

College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China

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SHENFENG LAI

College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China

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JIANBEI QIU

College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China

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ZHIGUO SONG

College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China

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YONG YANG

College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China

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, and

DACHENG ZHOU

College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China

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https://doi.org/10.1142/S0218625X15500109Cited by:2 (Source: Crossref)

Abstract

The opal photonic crystals made of polystyrene microspheres with 155, 230, 270 or 410 nm in diameter were used to enhance upconversion (UC) emission of YF₃:Yb³⁺, Er³⁺ nanoparticles, respectively. The red or green UC emission of YF₃:Yb³⁺, Er³⁺ nanoparticles can be selectively enhanced when the red or green UC emission wavelength overlapped with the photonic bandgaps of opals, which is attributed to Bragg reflection of photonic bandgap. In addition, when the 980 nm excitation light wavelength was in the region of the photonic bandgap, red and green UC emissions of YF₃:Yb³⁺, Er³⁺ nanoparticles were enhanced due to the enhancement of excitation field.

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