磷光材料在发光过程中可以利用单线态和三线态激子，理论上内量子效率达到100%，这类材料的使用成为提高器件效率的主要途径之一。
The advantage of phosphorescent materials is that they can utilize both singlet and triplet exciton states which can reach 100% internal quantum efficiency theoretically.
本发明提供了可以在低电压下驱动、实现高亮度和高效率并具有长 寿命的利用磷光的有机EL元件。
The present invention provides an organic EL device utilizing phosphorescence which can be driven at a low voltage, which realizes high luminance and high efficiency, and which has a long lifetime.
稀土由17种元素组成。其中铽（Tb）可用来制造平板电视绿色磷光物，激光和高效率荧光灯。
Rare earths are comprised of 17 elements, such as terbium, which is used to make green phosphors for flat-panel TVs, lasers, and high-efficiency fluorescent lamps.
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