Upconversion White Light Devices: Ln3+-Tridoped NaYF4 Nanoparticles and PVP Modified Films
Authors: Dong, Biao; Song, Hongwei; Qin, Ruifei; Bai, Xue; Lu, Shaozhe; Ren, Xinguang; Pan, Guohui; Zhang, Hui; Wang, Fang; Fan, Libo
Source: Journal of Nanoscience and Nanotechnology, Volume 8, Number 8, August 2008 , pp. 3921-3925(5)
Publisher: American Scientific Publishers
Abstract:Upconversion (UC) white light hybrid thin films containing Ln3+-tridoped (Yb3+, Er3+ and Tm3+) NaYF4 nanoparticles and poly(vinyl pyrrolidone) (PVP, Mw ≈ 1300 000) were prepared by a spin-coating method and characterized by X-ray diffraction (XRD), field emission scanning electron micrograph (FE-SEM) and Fourier transform infrared spectra (FT-IR). White light was generated by two different lanthanide ions, Er3+ (red and green) and Tm3+ (blue) under excitation by a 980-nm laser diode. Due to the modification of PVP to the UC populating processes, the color stability of the white light in the hybrid films was remarkably improved.
Document Type: Research Article
Publication date: August 2008
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