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標題: | 有機發光二極體光萃取之研究 Study on light extraction of organic light-emitting diode |
作者: | Hao-Chun Hsu 徐浩淳 |
指導教授: | 李君浩(Jiun-Haw Lee) |
關鍵字: | 有機發光二極體,光萃取,奈米結構,表面電漿態,波導模態, organic light-emitting diode,light extraction,nanostructure,surface plasmon mode,waveguiding mode, |
出版年 : | 2017 |
學位: | 碩士 |
摘要: | 本論文探討發光二極體之光萃取技術,利用奈米結構將元件內部的光線導引出來,並探討其機制。論文主要分為兩部分,一部分是不同奈米結構週期的調變,另一部分是對發光二極體中,電子傳輸層的厚度調變。
在第三章中,我們將三種不同週期的光柵(833.33, 416.67, 277.78奈米)來製作元件,搭配週期為416.67奈米的微結構與半球透鏡的貼附最高可以得到103.02%的外部量子效率的提升,透過偏振片可以分別量測垂直極化光與水平極化光兩種方向的偏振光,並且利用計算的結果來分析表面電漿態與波導模態的光萃取。 在第四章中,我們改變電子傳輸層的厚度(15、40、115、165 和 215 奈米),在電子傳輸層為40奈米的時候元件效率會出現最大值,當電子傳輸層的厚度逐漸增加,由表面電漿態所萃取出來的光強度會逐漸下降,而由波導模態所萃取出來的光強度會增加再下降。 In this thesis, we study on light extraction of organic light-emitting device (OLED) with nanostructures. There are two part in the thesis. The first one is varying the pitch of nanostructured for the OLEDs. And the second is varying the electron transport layer (ETL) thickness of the nanostructured OLEDs. In chapter 3, we use gratings with three different pitches (833.33, 416.67, 277.78 nm) to fabricate nanostructured OLED. With macrolens and 416.67-nm pitch nanostructure, 103.02% external quantum efficiency (EQE) enhancement can be obtained. With polarizer, we can separate transverse electric (TE) and transverse magnetic (TM) waves, which can be used to calculate the light extraction from surface plasmon (SP) mode and waveguiding mode. In chapter 4, electron transport layer (ETL) of the nanostructured OLEDs (pitch= 416.67 nm) was modulated (15, 40, 115, 165 and 215 nm). With 40-nm ETL nanostructured OLED, maximum EQE performance could be obtained. From the EL measurement of the nanostructured OLED, it was found that extraction of SP mode decreased with increasing the ETL thickness. On the other hand, extraction of waveguiding mode increased then decreased at the same time. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/68276 |
DOI: | 10.6342/NTU201704243 |
全文授權: | 有償授權 |
顯示於系所單位: | 光電工程學研究所 |
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