共軛高分子同質接面之高效率白光

Abstract

在本文中我們探討一種製作白光有機發光二極體的新方法，改良元件的結構即可達到很高的效益及亮度。文獻上已有許多白光有機發光二極體的做法，包括高分子摻合體(polymer blend)、界面間的雙聚體(exciplex)發光、螢光物或染劑的摻雜，但其效益及亮度方面皆未達到產品上的要求。

我們運用“多層結構”加上“高分子摻合體”此兩種方式，將元件設計成類似無機半導體的同質接面(homojunction)以增加其效率；此“有機發光二極體同質接面結構”可利用共軛高分子特性，可大面積製作，且以溶液方式旋轉塗布，方便製程。元件可達10000 cd/m2以上的亮度，最高效率接近3cd/A。

In my thesis, we discussed a new method to make white polymer light-emitting diodes by improving the structure of devices. It can achieve high-efficiency and high-luminance. There are many ways to achieve white polymer LEDs, include polymer blends; exciplex in bilayers, phosphorescent Ir complex; polymer dope with dyes. But these yield and luminance are not yet achievable for application of manufactures.

We use two steps to make our device: (1)multi-layer and (2)polymer blend. It can make organic material to produce homojunction like inorganic semiconductor. And it also has the advantages of large area and solution process. In this structure, the peak luminance of our white polymer LEDs can achieve over 10000 cd/m2, and the pick yield can achieve almost 3cd/A.