TiO_2纳米微粒对PPV发光性能的影响

Effect of TiO_2 Nanoparticles on the Luminescence Properties of PPV

采用溶胶 凝胶法制备了一系列PPV/TiO2 纳米复合膜 ,探讨了TiO2 纳米微粒对PPV发光性能的影响 .研究发现 ,这些复合膜的发光性质依赖于TiO2 /PPV的质量比 ,.在TiO2 /PPV的质量比为 1 / 9时 ,复合膜中的TiO2 微粒对PPV的荧光具有猝灭作用 ;当TiO2 /PPV的质量比为 1 / 1时 ,复合膜中的TiO2 对PPV的荧光具有增强作用 .通过FT IR ,UV Vis。

A series of poly(phenylenevinylene)(PPV)/ TiO 2 nanocomposites were prepared from the mixtures of PPV precursor and TiO 2 sol by employing a sol gel process. The luminescent properties of the PPV/TiO 2 nanocomposites were dependent on the mass ratio of TiO 2 to PPV. When the mass ratio of TiO 2 to PPV was 1/9, the resultant TiO 2 nanoparticle quenched the luminescence of PPV. However, when the mass ratio of TiO 2 to PPV was 1/1, the PPV/TiO 2 nanocomposites showed enhanced luminescence. In this paper, the relationships between the luminescent properties and structures of PPV/TiO 2 nanocomposites were investigated by FT IR, UV Vis, FL spectra and TEM. [WT5HZ]