有機發光元件中的表面電漿能量轉移和微共振腔之研究

Abstract

在本論文中，首先我們將有機發光二極體的金屬電極厚度變薄，在金屬電極上方蒸鍍吸收光/再放光有機層，可以將原本侷限於有機發光二極體中的表面電漿子，經由有機層將部份表面電漿能量吸收後再放光的方式，將不能放光的表面電漿模態再利用，產生輻射光場，增加有機發光二極體的出光效率，另外，藉由表面能量轉移的機制，製作出光源色彩可以改變的單邊表面電漿能量轉移之雙面異色發光二極體。 接著，我們有系統地分析具有強微共振腔效應及雙邊表面電漿能量轉移的有機發光二極體，結構是玻璃/有機層(吸收光/再放光)/陽極金屬電極/有機層/陰極金屬電極/有機層(吸收光/再放光)，我們改變金屬的厚度，探討強微共振腔效應和表面電漿能量轉移對於有機發光二極體出光效率的影響，並且將實驗結果和理論計算相比較，發現相當吻合。

In this thesis, first we reduce the thickness of metal elecctrode in organic light-emitting diodes. Then we evaporate absorbing/re-emission organic film on top of the metal eletrode to recycle a portion of surface plasmon polaritons (SPPs) in organic light-emitting diodes to induce surface plasmon polariton mediated energy transfer and re-emission.This mechanism can enhance out-coupling efficiency in organic light-emitting diodes and may be utilized for achieving double-emitting organic light-emitting diodes with single-sided surface plasmon polariton medeiated energy transfer and with color tuning capability. Next, we analyze organic light-emitting diodes with strong microcavity effects and double-sided surface plasmon polariton mediated energy transfer systematically. The structure is glass/ organic film (absorption/re-emission)/ metallic anode/ organic film/ metallic cathode/ organic film (absorpton/re-emission). We change the thickness of metallic electrodes to investigate the effects of strong microcavity combined with surface plasmon polariton mediated energy transfer for out-coupling efficiency, colors and viewing-angle characteristics in organic light-emitting diodes. The experimental results match calculated results fairly well.