Microchimica Acta

, 185:237 | Cite as

Synthesis of Er(III)/Yb(III)-doped BiF3 upconversion nanoparticles for use in optical thermometry

  • Peng Du
  • Jae Su Yu
Original Paper


The authors describe an ethylene glycol assisted precipitation method for synthesis of Er(III)/Yb(III)-doped BiF3 nanoparticles (NPs) at room temperature. Under 980-nm light irradiation, the NPs emit upconversion (UC) emission of Er(III) ions as a result of a two-photon absorption process. The temperature-dependent green emissions (peaking at 525 and 545 nm) are used to establish an unambiguous relationship between the ratio of fluorescence intensities and temperature. The NPs have a maximum sensitivity of 6.5 × 10−3 K−1 at 619 K and can be applied over the 291–691 K temperature range. The results indicate that these NPs are a promising candidate for optical thermometry.

Graphical abstract

Schematic of the room-temperature preparation of Er(III)/Yb(III)-doped BiF3 nanoparticles with strongly temperature-dependent upconversion emission.


Fluorides Ethylene glycol Thermometer NIR light Energy transfer Remote sensing FIR technique X-ray diffraction Luminescence 



This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. 2017R1A2B4011998).

Compliance with ethical standards

The author(s) declare that they have no competing interests.

Supplementary material

604_2018_2777_MOESM1_ESM.docx (1.5 mb)
ESM 1 (DOCX 1554 kb)


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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Electronic EngineeringKyung Hee UniversityYongin-siRepublic of Korea

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