含2-吡啶吡唑族配基的有機鋨、鉑金屬錯合物光物理性質之研究及其在有機發光二極體元件之應用

本書目的在探討含2-吡啶吡唑族配基的有機鋨、鉑金屬錯合物光物理性質之研究及其在有機發光二極體元件之應用。其內容主要分成六大章，前兩章簡述了一些關於有機發光二極體的發展史及關係本論文的一些基本光物理性質的簡介。第三章介紹了利用二價鋨金屬所形成之含2-吡啶吡唑族配基金屬錯合物的光物理性質，藉由一些適當的且也系統的分子設計，我們得到了藍色發光材料；此外，在該章節裡一探討了如何利用推拉電子基效應來獲得MLCT (metal-ligand-charge- transfer) 或 pp* excited state 的放光。第四章則著重在如何利用金屬鉑離子的重原子效應 (Heavy atom effect)以取得紅光發光材料；為了得到好的放光效率及避免聚集 (aggregation) 的產生，我們在含2-吡啶吡唑族配基的鉑金屬錯合物上加入了大基團衍生物，利用該錯合物所製得之發光元件在放光量子產率上有極大的突破。在第五章中，我們利用硼元素與2-吡啶吡唑族配基形成錯合物以提高其分子之剛硬性 (rigidity) 進而提高其放光量子產率，除此之外，我們亦在這些硼錯合物分子上施以適當之分子設計並達到調整放光波長的效果，藉此我們可以獲得不同顏色之放光材料 (由藍綠光到紅光)。最後，在第六章中，我們利用鋨金屬離子之重原子效應，首度發現了三重態的電荷轉移現象 (於常溫下)，並探討了金屬離子與發光基團間的距離以及intersystem-crossing rate的關係。

關鍵字

有機發光二極體元件；有機鋨；鉑金屬錯合物光物理性質

並列摘要

Organic light-emitting devices have drawn a great deal of interests and are successively under intensive study due to their high electroluminescence (EL) efficiency all over the visible region. There are several advantages of the OLED displays over traditional LCD or LED displays. First, OLED based displays could be much thinner than the LCD panel, and are as responsive as the CRTs, people won’t see any smearing from slow pixel response time that usually take place in LCD panels. In addition, OLEDs are also superior to LCD panels in terms of viewing angle. Second, an LED emits light from a seam between two layers of different materials, which is fine for small points of light but not for large displays. OLEDs emit light through the layers, so many can be fabricated next to each other for large displays. Nevertheless, there still exits some serious problems in application of OLEDs. In this thesis, we will demonstrate you some intriguing photophysical properties of the novel materials that have the potentials in the application of OLEDs. Base on these photophysical properties found, we conclude some guidelines for the design of new generation of the OLED materials (metal complex based OLEDs). Including the ligand orientation effects, ligand charge-transfer effects, and steric hindrance effects.

並列關鍵字

OLEDs ； 2-pyridyl pyrazole

參考文獻

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