目前為止，白光發光二極體仍是以藍光二極體激發黃色螢光粉為主流，雖然有較高的流明效率(lm/W),但是此種方式的元件演色性較差，為了提高白光二極體的演色性，本篇用有機材料C545P來做為二極體之螢光粉製作白光二極體。

本篇提出二種的製作方式：1、以紫外光二極體(380nm)激發C545P有機螢光粉之白光二極體；2、以 藍光二極體(460nm)激發 紅/C545P 混合之螢光粉之白光二極體。實驗証明，上述兩種方式皆能得到很高之演色性。第一種方式，因為只用單一螢光粉體，所以可以免除於調合紅、綠、藍三色螢光粉調整比例的困難。第二種方式，有不錯的效率與亮度，在相同條件與一般 藍光二極體激發紅/綠螢光粉比較，有更佳的演色性，所完成之元件在20mA與350mA驅動電流下，分別有40.7lm/W與23.8lm/W之發光效率。因此，以有機螢光粉C545P在白光二極體的製造上，有相當不錯的成果。

Recently, white light - emitting diodes (LEDs) are mostly achieved by suing blue LED pumping yellow phosphor. This type of device has higher luminous efficiency but bad color rendering index (CRI). In order to improve CRI of white LED, this thesis used organic material C545P to fabricate white light-emitting diode.

Two methods were proposed to fabricate white LED. One is to use UV-LED (380nm) pumping organic phosphor C545P for white LED. The other is to use blue LED (460nm) pumping red/organic material C545P mixed phosphor for white LED. The experiments show that these two methods can obtain higher CIR of white LED. In the first method, it is difficult to use only one kind phosphor to improve the allocation of UV-LED pumping GRB phosphor. The second method can obtain better luminous efficiency and light intensity of white LED. In the same condition, it has higher CRI as compared with general blue LED pumping red/green mixed phosphor. The luminous efficiencies for this device are 40.7lm/W and 23.8lm/W at 20mA and 350mA, respectively. In other words, the fabrication of white LED with organic phosphor C545P can lead to excellent device performance.

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