雙主體發光層之白光OLED元件
之發光特性研究

近幾年白光OLED照明的產業發展受到注目，而研發之重點大多著重在高效率、高演色性、長壽命以及大面積製程等特性。其中效率的提昇是相當重要的研究項目。在本研究中，針對Hybrid WOLED的製造及特性進行研究，其元件結構是利用黃色磷光和藍色螢光發光層進行結合。為了提昇WOLED的效率，本研究利用內阻隔層(interlayer)結構以及雙主體雙光層機制兩個部分以提升元件效率。第一部份，透過實驗我們發現使用EPHI06/EPHI02之內阻隔層的WOLED元件相較於不使用內阻隔層的WOLED元件在1000 cd/m2下元件發光強度可增加40%且元件效率能提升25%達到25 lm/W。第二部份我們發現利用EPHI06/EPHI02所組合成的雙主體發光層之WOLED其元件效率相比使用單主體發光層之WOLED元件在1000 cd/m2下元件效率從25 lm/W提升了一倍達到50 lm/W。由實驗結果我們可以瞭解到雙主體發光層機制可以在不增加元件結構的情況下有效提升WOLED元件效率，對於WOLED未來的應用發展相當有利。

關鍵字

內阻隔層；雙主體發光層；磷光；螢光

並列摘要

Recently, the development of WOLED lighting is being noticed. Furthermore, the development is focused on high efficiency, high color rendering, long life-time, large scale production, and so on. Besides, it is important to improve the efficiency of WOLED. Therefore, the aim of the thesis is to deal with this idea. The aim of the thesis is to undertake the production and to figure out the property of Hybrid WOLED. In the research we combine the yellow phosphorescent and the blue fluorescent to produce Hybrid WOLED. In order to make WOLED more efficient, we use the interlayer structure and co-host emitting layer to improve the efficiency of WOLED. First , we find out the emission intensity of WOLED with interlayer can be increased 40% more and the efficiency can be 25% more than the WOLED without interlayer at 1000 cd/m2. Second , we find out the efficiency of the co-host emitting layer WOLED is 50 lm/W at 1000 cd/m2 and it is two times more than the single-host emitting layer WOLED. From the experimental results we can know that the co-host emitting layer can improve the efficiency of WOLED without increasing the structure. Therefore the co-host emitting layer can be very helpful to the development of WOLED.

並列關鍵字

interlayer ； Hybrid ； co-host ； phosphorescent ； fluorescent

參考文獻

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[4] H. Sasabe , J. Takamatsu , T. Motoyama , S. Watanabe ,G. Wagenblast , N. Langer , O. Molt , E. Fuchs , C. Lennartz ,and J .Kido, “High-Efficiency Blue and White Organic Light-Emitting Devices Incorporating a Blue Iridium Carbene Complex,” Advanced Materials,2010.

[5] C. Chang , Y. Ding , P. Hsieh , C. Chang ,W. Lin and H. Chang,“Highly efficient phosphorescent blue and white organic light-emitting devices with simplified architectures” Thin Solid Film,2011.

[6] J. H. Jou, M. H. Wu, C. P. Wang, Y. S. Chiu, P. H. Chiang, H. C. Hu and R. Y. Wang, “Efficient fluorescent white organic light-emitting diodes using co-host/emitter-dual-role possessed di(triphenyl-amine)-1,4-divinyl-

[7] Y. Li, X.L.Li, X.Cai, D. Chen, X. Liu, G. Xie, Z. Wang, Y.C.Wu,C.C. Lo,A. Lien,J. Peng,Y. Cao and S.J. Su, “Deep blue fluorophores incorporating sulfone-locked triphenylamine: the key for highly efficient fluorescence–phosphorescence hybrid white OLEDs with simplified structure”, Journal of Materials Chemistry C ,2015.

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雙主體發光層之白光OLED元件之發光特性研究

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