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Citation: LI Wan-Li, LIU Xiao-Yun, MIAO Yan-Qin, YANG Jun-Li, WU Cong-Ling, LI Yuan-Hao, GUO Kun-Peng, WANG Hua, XU Bing-She. MgF2 Modified Alq3 Nanocomposite: Synthesis and Improvement of Anti-Aging Performance of OLED[J]. Acta Physico-Chimica Sinica, ;2015, 31(9): 1780-1786. doi: 10.3866/PKU.WHXB201507151 shu

MgF2 Modified Alq3 Nanocomposite: Synthesis and Improvement of Anti-Aging Performance of OLED

  • 1.

    1 Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, P. R. China;
    2 Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, P. R. China

  • Available Online: 15 July 2015

    Fund Project: 国家自然科学基金(61307029, 21101111, 61205179, 61307030) (61307029, 21101111, 61205179, 61307030) 教育部新世纪人才计划(NCET-13-0927) (NCET-13-0927)科技部国际科技合作专项项目(2012DFR50460)资助 (2012DFR50460)

  • From the viewpoint of practical application, enhancing the stability and lifetime of organic lightemitting diodes (OLED) is a al of research. A MgF2 modified tris(8-hydroxyquinoline)-aluminum (Alq3) hybrid superstructure was realized by collosol infiltration of a Mg(CF3COO)2-x(CH3COO)x precursor onto Alq3. Alq3 was well-dispersed in a large amount of Mg(CF3COO)2-x(CH3COO)x gel precursor solution, and after concentration a well-dispersed composite paste was produced. By heating the paste to 300 ℃, Alq3 transformed to the superstructured ε-phase, and MgF2 homogeneously incorporated because of od gel precursor infiltration and in situ deposition. The MgF2-modified Alq3 nanocomposite with superstructure has the same electroluminescence (EL) spectrum as Alq3, with a dramatic improvement of the anti-aging performance of the OLED compared with Alq3 because of the uniform assembly and well-defined structure. The effect of the amount of Mg(CH3COO)2 reactant on the OLED device anti-aging performance was investigated. The results showed that for the Alq3-MgF2 nanocomposite with 5% (molar fraction) of the Mg(CH3COO)2 reactant, the luminance remained at the initial state of 93.5% after aging for 72 h in air. However, the luminance of the Alq3-based OLED almost disappeared after aging for 24 h under the same conditions. This work on inorganic material modified luminescent materials makes significant progress towards stable OLED.

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