Abstract
AbstractUpconversion luminescence of rare‐earth ions doped nanoparticles can be enhanced by the localized surface plasmon resonance (LSPR) of noble metals nanoparticles, which was extensively investigated. The semiconductor nanomaterials such as the WO2.72 exhibited the tunable LSPR, which provide the possibility for the luminescence enhancement of upconversion nanoparticles. In this work, the urchin‐like WO2.72 was successfully prepared by solvothermal method, exhibiting the LSPR in the near infrared region. The influence of LSPR of WO2.72 on the upconversion luminescence of NaYF4:Yb3+,Er3+ nanoparticles was investigated firstly. The 525, 542, and 660 nm upconversion luminescence of NaYF4: Yb3+,Er3+ nanoparticles was increased by the 10, 8, and 12 factors, respectively, which was from the enhanced excitation field induced by the WO2.72 film.
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