2015-01-012024-05-16https://scholars.lib.ntu.edu.tw/handle/123456789/668628摘要：本計畫的重點會放在藍光有機電激發光元件之研究，以及太陽能電池之開發。在三原色（紅，綠，藍）有機電激發光元件中，目前藍光元件之效率及壽命為最低的，也是亟待開發的瓶頸之一。我們實驗室將專注於藍光元件，利用臺灣大學化學系梁文傑教授所開發的一系列藍光主體材料，藉由不同的連結及破壞共軛，可以保持高的單重態及三重態能量，並改變不同之&#21652;唑、三唑、咪唑、及噁唑衍生物，用以調整電洞及電子遷移率，以及最高填滿軌域及最低未填滿軌域。此外，我們將引入適當的元件設計，藉由挑選合適的傳輸材料，控制膜層厚度以及摻雜濃度，以提高效率及延長壽命。在此同時，我們將建立起一套適用於藍光有機電激發光元件之光電模型，進行進一步物理機制探討。而在太陽能電池研究方面，我們從有機太陽能電池出發，利用挑選適當的材料及製程控制，以提升高開路電壓，並調整元件結構，以達成載子平衡及提升內部量子效率。增加吸收的部分，則引入非平面結構及電漿子結構。在提升填充因子的部分，則由不同的元件設計（如加入激子阻擋層）及調整製程參數來達成，以製作出高效率的元件。此外，我們也將探討有機材料中激子分裂之行為。藉由激子分裂的機制，可以使得吸收的光子變為兩倍的激子，再配合適當的拆解，則可以大幅的提升短路電流。我們將對於有機材料中激子分裂進行詳細之探討，另外需要找尋合適的材料以及設計適當的元件結構，提供合適的拆解介面，以將將激子拆解為可用的電子電洞對，另外可能的方式，並不是利用激子拆解的方式，而是利用能量轉移的方式，將激子轉移至另一低能隙的材料，再進行拆解。這部分需要進一步研究。<br> Abstract: In this project, we will focus on the researches on blue organic light-emitting diode (OLED) and solar cell. Among three primaries (red, green, and blue), blue OLED exhibits lowest quantum efficiency and shortest operation and it is one of the bottlenecks for OLED development. We will use the organic host materials synthesized by Prof. Man-Kit Leung`s group (Chemistry Department, National Taiwan University). Conjugation is interrupted with different core configuration to maintain the high singlet and triplet energies. With different cabazole, triazole, imidazole, and oxadiazole moieties, it is possible to tune hole and electron mobility, and the energy levels of highest occupied molecular orbital and lowest unoccupied molecular orbital. Besides, we will introduce suitable device design and organic materials. By controlling the layer thickness and dopant concentration, high efficiency and long lifetime can be obtained in our blue OLED. Besides, we will establish a optical-electrical model suitable for blue OLED, which can be used for studying the physical mechanisms in such a device. For solar cell researches, we will start from organic solar cell. By choosing suitable material and process control, it is possible to improve the open circuit voltage. Carrier balance and internal quantum efficiency improvement can be achieved by adjusting layer thickness. Introducing non-planar structure or plasmonic structure will help to boost the absorption of the organic solar cell. For increasing the fill factor, we will use different device structures, such as the incorporation of exciton blocking layer, and adjust fabrication parameters. Besides, we will investigate the exciton fission characteristics in organic materials. One singlet exciton in organic materials may split into two triplet escitons through fission process. With suitable dissociation, it is possible to significantly increase the short circuit current. Here we will search for suitable organic materials and deice structure for better exciton dissociation. An alternative is to use the energy transfer process, rather than energy transfer.有機電激發光元件太陽能電池OLEDsolar cell