Functional metal ions in advanced electronic and luminescent materials

2^nd World Chemistry Conference

August 08-10, 2016 Toronto, Canada

Jianhua Hao

The Hong Kong Polytechnic University, P R China

Posters & Accepted Abstracts: Chem Sci J

Abstract :

Metal-ion doped compounds have attracted considerable attention and applied in diverse research fields because of their full spectrum of various behaviors, such as dielectrics, optical spectroscopy and light-emission. TiO2 co-doped with metal-ions are synthesized and the colossal permittivity (CP) properties of the materials are found based on electron-pinned defect-dipoles mechanism. Structural, optical raman spectra and dielectric properties of the synthesized CP materials are presented. Our results are helpful for not only investigating the new class of CP materials, but also developing dielectric thin film device applications. On the other hand, a large group of luminescent materials or phosphors is so-called metalion doped phosphor. In such materials, optical and luminescent characteristics may be controlled by the host and metal-ion dopants (lanthanide or transition metal) of the phosphor. My talk will present the development in the basic design rules of such materials, synthetic approaches, and fabrication processes of metal ion doped phosphors. Metal-ion doped luminescent materials are attracting widespread interest in multifunctional applications. Tuning luminescence of our recent works will be reported on through a variety of techniques, including electric-field, mechanical stress, and magnetic field. Through these works, some potential application can be perceived, which may contribute to future energy devices, sensors as well as selfpowered electronics and optoelectronics. jh.hao@polyu.edu.hk