新胺基含氮喹啉鋁螯合物之光物理性質與有機電激發光之應用

Photophysical Properties of New Amino-Containing Hydroxynaphthyridine-Derived Aluminum Chelates and Their Applications for Organic Light-Emitting Diodes

林姈穎(Lin Ling-Ying)

指導教授 ： 陳錦地

國立臺灣師範大學/理學院/化學系/碩士(2011年)

摘要

Alq3在有機發光二極體中是最常被使用的金屬螯合物之ㄧ。藉由將五號位置上的碳氫置換為氮，使得鋁與其4-hydroxy-1,5-naphthyridine螯合有較短的放光波長、較佳的載子移動率與高熱穩定性，我們可以利用真空蒸鍍的技術簡易製做出所需的元件。因此我們合成不同4-hydroxy-1,5-naphthyridine之衍生物及其鋁螯合物，並探討光物理性質及電化學研究。這一系列化合物作為發光層製作成元件，可得到良好的電激發光效率，並且可成功地用在主、客體發光系統中作為主體材料，製作出高效率的藍光（摻入物）元件與白光元件。例如我們將perylene摻雜進上述的主體材料，其元件的外部量子效率可達到2.4%，CIE色度座標落在(0.14, 0.25)；應用於固態照明時，則將rubrene摻雜入上述主體材料，其白光元件在100 cd/m2的亮度下，外部量子效率可達4.8%；在1000 cd/m2的亮度下，外部量子效率達4.7%，在最大亮度下的CIE色度座標落在(0.34, 0.46)。

關鍵字

有機發光二極體

並列摘要

Green tris-(8-hydroxyquinoline) aluminum (Alq3) is one of the most useful metal chelates for organic light emitting diodes (OLEDs). By changing 5-position CH to N, aluminum chelates of 4-hydroxy-1,5-naphthyridine exhibit very deep blue fluorescence, wide band gap energy, high charge carrier mobility, and superior thermal stability. Using a vacuum-thermal-deposition process in the fabrication of OLEDs, we have successfully demonstrated that the application of these unusual hydroxynaphthyridine aluminum chelates can be very versatile and effective. Therefore, we synthesized and characterized a series of aluminum chelates with different 4-hydroxy-1,5-naphthyridine derivatives. They can be a highly efficient blue emitter as well as host material for efficient dopant-based blue or white OLEDs. They can be a host material for efficient blue perylene dopant (CIEx,y = 0.14, 0.25 and maximum ηext 2.4%). For solid state lighting application, they are desirable as a host material for yellow dopant (rubrene) in achieving high efficiency (ηext 4.8% and ηP 8.5 lm/W at an electroluminance of 100 cd/m2 or ηext 4.7% and ηP 6.9 lm/W at an electroluminance of 1000 cd/m2) white electroluminescence (CIEx,y = 0.34, 0.46) with mild efficiency roll-off.

並列關鍵字

Organic Light-Emitting Diodes ； OLEDs

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