Abstract
A series of thin single matrix and single-layered light-emitting films based on polyoxometalates Na9EumTbnCe1-m-nW10O36 were prepared by a simple and effective spin-coating method. The films exhibit a color tunable luminescence over a wide range (blue, green, red and white) by adjusting the molar ratio of Ce3+: Tb3+: Eu3+ in Na9EumTbnCe1-m-nW10O36. The white light emission film was obtained at 3.0: 1.0: 0.05 M ratio of Ce3+: Tb3+: Eu3+, namely, Na9Eu0.0123Tb0.246Ce0.7417W10O36. The films were characterized by IR spectra, powder X-ray diffraction, ICP, UV, and scanning electron microscope (SEM). The results obtained in this work definitely provide new opportunities in designing the optical functional materials based on polyoxometalates.
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