Application of Phosphate Phosphor in Solid-State White Lighting of the Next-Generation

Application of Phosphate Phosphor in Solid-State White Lighting of the Next-Generation

White Light Emitting Diode (WLED) has the advantages of a small size, low amount of heat, low power consumption, long life time, excellent response speed, environmental protection, planer packaged, and easily made for the products which are lighter, thinner, short, smaller and so on. Meanwhile, white LED has advantages such as lower power consumption and hardly broken than incandescent bulbs. Thus, white LED is the most optimistic product with a large potential in place of the conventional lighting equipment in the future. The characteristics of white LED have been compared with the conventional lighting equipment, as shown in Table 1. In fact, LED is a diode formed from semiconductor materials emitting light through a forward bias. Moreover, the materials of the LED diode usually were III-V group of the chemical elements, such as gallium phosphide, gallium arsenide, indium gallium aluminum phosphide (Gap), and indium gallium nitride (InGaN) used for high-brightness LED currently. The light-emitting principle of LED is applied a driving current to the semiconductor compound to promote the combination of electrons and holes.