Abstract
AbstractWe reported a new approach to prepare the homogenous EuF3 nanoplates and discussed their potential applications. Upon 396 nm excitation, the EuF3 nanoplates exhibited the visible emissions with high color purity of 84.7%. The monitored photoluminescence emission spectrum indicated that the Eu3+ ions took the high symmetry positions in the host lattices which was further confirmed via the theoretical calculation based on the Judd‐Ofelt theory. The thermal quenching performance of the EuF3 nanoplates was analyzed by the temperature‐dependent photoluminescence emission spectra and the activation energy was decided to be 0.28 eV. With the aid of the near‐ultraviolet chip and EuF3 nanoplates, a red‐emitting light‐emitting diode device was prepared so as to identify the feasibility of the EuF3 nanoplates for solid‐state lighting. Additionally, the cell viability of the EuF3 nanoplates as well as their fluorescence imaging behaviors in the A549 lung cancer cells was also investigated. The observed results demonstrated that the EuF3 nanoplates were bifunctional platform for in vitro cell imaging and solid‐state lighting.
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