|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||2016 Technical Division Student Poster Competition
||SPG-9: An Eco-friendly Red Phosphor with Very High Intensity
||Chieh-Szu Huang, Shih-kang Lin, Cheng-Liang Huang
|On-Site Speaker (Planned)
Red light phosphor is the key component for stimulating natural sunlight LEDs. Recent years, Mn+4 luminescence centers are commonly used to substitute environmentally hazardous rare-earth dopants. However, the choice of matrix materials is usually fluoride compound, e.g. K2TiF6, which derivate contaminate issues on silicon industry. In this paper, the ecofriendly “rare-earth-free” and “flouoride-free” red light luminance material, Mg2TiO4 (MTO) with the luminescent center of Mn+4 (MTO:Mn), is investigated. The atomistic models were constructed using ab initio calculations based on density functional theory. The density of states of MTO:Mn with varies potential sensitizers reveal that the best candidate for sensitizer is niobium (Nb). In addition, phosphors were fabricated via solid state sintering. X-ray diffraction spectrum shows no meta-stable phase and photoluminescence spectrum indicates the intensity of light is around 400% after sensitized. This report successfully proposes a novel method to understand optoelectronic properties of phosphors and in turn obtain desirable products.
||Definite: None Selected