有機電激發光元件之電性模擬

Abstract

在本篇論文中，我們建立一個程式來模擬有機電激發光元件的電氣特性。這個程式的基礎是載子漂移和擴散模型，該模型考慮：（1）與電場相關的載子遷移率，（2）載子由金屬電極注入有機層或於有機層間遷移，（3）載子在有機層傳輸及復合。首先我們使用該程式來模擬文獻中單載子元件的電流電壓特性並得到相同的趨勢。接下來我們使用該程式來模擬異質接面元件和混合層元件的電性特性，模擬的結果和實驗量測的結果有相同的趨勢。最後我們使用光學模擬程式來模擬異質接面元件和混合層元件的光學特性，藉由結合光學模擬的結果和電性模擬的結果，來幫助我們來判斷不同比例的混合層元件中發光區的位置。

In this thesis, we demonstrate a numerical model for electrical simulation of organic light-emitting devices (OLEDs). This calculation is based on the drift-diffusion model that contains charge carrier drift with field dependent mobility, thermionic emission, heterojunction interface and recombination process. First we got the same results of the current-voltage characteristics published in literatures. Then we used our program to fit the electrical characteristics of our OLEDs, which includes conventional heterojunction (HJ) and mixing-host (MH) devices. Similar trends are obtained between the simulation and experiment results. Finally an optical simulation program was used to model the optical characteristics of HJ and MH devices which help to define the recombination zone in MH devices.