以夾層結構製備螢光白光有機發光二極體

Fluorescent White Organic Light-Emitting-Diode Fabricated By Interlayer Process

賴文鉉(Wen-Hsuan Lai)

指導教授 ： 莊賦祥

共同指導教授 ： 蔡裕勝(Yu-Sheng Tsai)

國立虎尾科技大學/電機資訊學院/光電與材料科技研究所/碩士(2014年)

摘要

本研究將電洞傳輸性良好之藍光發光材料MDP3FL，搭配黃光發光材料Spiro-QDPAP ，在無主體的條件下，蒸鍍螢光藍光及黃光染料，並將染料經由適當的能階組合與利用夾層概念，製備出能同時具備效率以及接近白光表現的雙波段螢光有機發光二極體。經由不同夾層數量的元件結構比較，我們得到最佳化元件效率表現，在亮度100, 1,000 cd/m2，能量效率為15.1 和14.8 lm/W，最大亮度為13,640 nits，CIE色座標為接近白光區域(0.38, 0.36)。本研究對蒸鍍製作螢光白光發光層的有機發光二極體之高效率的結構設計，有極大的貢獻。

關鍵字

有機發光二極體 ； 螢光 ； 白光

並列摘要

This experiment demonstrates the employment of a tri-interlayer device architecture with cascading energy levels to improve markedly the efficiency, and white-likely of a fluorescent organic light-emitting diode. As a tri-emissive layer structure was used in this experiment, for example, the resultant power efficiency at 100 and 1,000 nits was 15.1 and 14.8 lm/W, and CIE was (0.38, 0.36) closing white area, maximum luminance was 13,640 nits. Moreover, the neat film of the tri-emissive layer structure has even higher quality than the host-based Organic Light-Emitting-Diode counterpart has. The reason why the tri-interlayer device exhibits both high efficacy and high white-likely performance may be attributed to the MDP3FL the blue material was a host-transfer, balancing elections and holes combining in this manuscript, the wider recombination zone, the more effective carrier confinement, and energy-levels in the multi-interlayer allowing excitons to generate predominantly on the blue and yellow materials.
The device structure was composed of a 125 nm indium tin oxide anode layer (ITO), a 25 nm poly(3,4-ethylenedioxythiophene)–poly(styrenesulfonate) (PEDOT:PSS) hole injection layer, a 20 nm tri-emissive layer,
a 32 nm 1,3,5-tris(N-phenylbenzimidazol-2-yl)benzene (TPBi) electron-transporting layer (ETL), a 1 nm lithium fluoride (LiF) electron injection layer, and a 150 nm aluminium cathode layer. The tri-emissive layer structure was composed of a blue material of ,7-{2[phenyl(m-tolyl)amino]-9,9-dimethyl-fluorene-7-yl}-9,9-dimethyl-fluorene (MDP3FL), and yellow fluorescent material, Spiro-fluorene-dibenzosuberene[d](1,4-bis(4-(N,N-diphenylamine)-phenyl)-qui-noxaline) (Spiro-QDPAP).
To conclude, this experiment reports the fabrication of a high efficiency, white performance fluorescent OLED with the use of a tri-interlayer structure that exhibits big-mac structure energy levels to maximize the balancing of elections and holes combining in blue and yellow materials. The observed principles may be extended to the fabrication of high efficiency, fluorescent OLEDs of other colors, allowing the applications of OLED displays and lighting to be more energy saving and competitive in the future.

並列關鍵字

OLED ； white light ； fluorescence

參考文獻

[79] C. J. Zheng, W. M. Zhao, Z. Q. Wang, D. Huang, J. Ye, X. M. Ou, X. H. Zhang. C. S. Lee, and S. T. Lee, J. Mater. Chem., 2010, 20, 1560.

[58] W. S. Huang, J. T. Lin, C. H. Chien, Y. T. Tao, S. S. Sun, Y. S. Wen, Chem. Mater., 2004, 16, 2480.

[68] C. C. Wu, Y. T. Lin, K. T. Wong, R. T. Chen, Y. Y. Chien, Adv. Mater., 2004, 16, 61.

[8] K. H. Choi, H. J. Nam, J. A. Jeong, S. W. Cho, H. K. Kim, J. W. Kang, D. G. Kim, and W. J. Cho, Appl. Phys. Lett., 2008, 92, 223302

[18] L. Wang, Y. Jiang, J. Luo, Y. Zhou, J Zhou, J. Wang, J Pei, Y. Cao, Adv. Mater., 2009, 21, 4854.