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

LI Wan-Li ^1,2 ,
LIU Xiao-Yun ^1,2 ,
MIAO Yan-Qin ^1,2 ,
YANG Jun-Li ^1,2 ,
WU Cong-Ling ^1,2 ,
LI Yuan-Hao ^1,2 ,
GUO Kun-Peng ^1,2, ,
WANG Hua ^1,2, ,
XU Bing-She ^1,2

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.
- Organic lighting emitting diode,
- Nanocomposite,
- Alq₃-MgF₂,
- Luminescence,
- Anti-aging
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MgF₂ Modified Alq₃ Nanocomposite: Synthesis and Improvement of Anti-Aging Performance of OLED