電激發有機雷射微共振腔研究;Studies of Microcavity in Electrically pumped Organic lasers

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/54296

Title:	電激發有機雷射微共振腔研究;Studies of Microcavity in Electrically pumped Organic lasers
Authors:	林俊佑;Lin,Chun-Yu
Contributors:	照明與顯示科技研究所
Keywords:	微共振腔;有機雷射;Microcavity;Organic lasers
Date:	2012-08-23
Issue Date:	2012-09-11 18:43:21 (UTC+8)
Publisher:	國立中央大學
Abstract:	本篇論文主要是研究一有助於開發電激發有機雷射的微共振腔結構。我們將嘗試垂直共振腔面射型雷射的方法，將有機發光二極體置入微共振腔結構中，藉由優化微共振腔設計來提升品質因子（Q-factor）並減少光學損耗，以此降低雷射所需的電流密度閾值。在光學設計方面，我們提出一種經過優化的高反射鏡，是由TiO2/SiO2以非典型四分之一倍中心波長光學厚度堆疊組成，可依選擇的有機發光元件不同而改變優化參數以控制微共振腔的出光強度與半高寬，使有機材料的選擇更加彈性。在實驗製程方面，我們提出一種「雙基板組裝式結構」。其優點為可透過調整共振腔長度來選擇出光波長。製程方面也考慮到OLED懼水氣、易氧化、遇高溫易劣解的特性，可先鍍製完兩面高反射鏡後再鍍製OLED，元件完成即可立刻進行量測。我們成功地在實驗中觀察到有機發光二極體電激發光頻譜窄化和出光強度增強的現象。本研究提出的「雙基板組裝式優化微共振腔有機發光元件」同時具備了低吸收電極、低吸收高反射鏡及自由延長共振腔功能的優勢，預期可有效地降低元件雷射閾值，有助於未來應用於開發電激發有機雷射。The thesis is the study of a microcavity structure contributing to the development of electrically pumped organic lasers. A method that is vertical cavity surface emitting lasers (VCSELs) will be used in this work. We embedded an OLED in a optical cavity. Through the optimization of the cavity design to be able to exhibit narrow linewidth (FWHM) of emission spectrum and high quality factor (Q) that is allowed laser effect active at a low current density.In optical design, we propose an optimized high reflector. The reflector are made of two alternate low and high refractive index dielectric materials deposited into 2N + 1 layers with a quarter wavelength optical thickness for each layer. The mirrors made from well known couple of materials (TiO2/SiO2). We can change the optimization parameters to control the intensity and the linewidth of cavity modes according to the choice of the organic light emitting devices. This allows more flexibility in our choice of organic materials.In the experimental process, we propose a “dual-substrate assembly structure.” Its advantage is that we can adjust the cavity length to select the wavelength of cavity modes. The process also takes into account the organic materials characteristics that both sides of the mirrors can be coated finished and then coated organic light emitting device is completed. In the experiment, we observed the intensity enhancement of the cavity mode and the emitting spectrum narrowing in microcavity OLED structure.This study presents a “dual-substrate assembly structure of optimization microcavity organic light emitting device.” It has low absorption electrodes, low absorption reflectors and the freedom to extend the cavity length. According to that, a considerable reduction of the laser threshold is expected, and this study is expected to contribute to the development of electrically pumped organic lasers.
Appears in Collections:	[Institute of Lighting and Display Science ] Electronic Thesis & Dissertation

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