Effect of electric fields on photoluminescence of 4-(dicyanomethylene)-2-methyl- 6-(p-dimethylaminostyryl)-4H-pyran |
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| Authors: | Z. Xu G.Y. Zhong X.M. Ding E. Obbard H.J. Ding X.J. Wang Y.Q. Zhan S.T. Zhang J.M. Zhao B.L. Zhao Z.H. Xiong H.Z. Shi W. Huang X.Y. Hou |
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| Affiliation: | (1) Surface Physics Laboratory (National Key Laboratory), Fudan University, Shanghai, 200433, P.R. China;(2) Institute of Advanced Materials and Technology, Fudan University, Shanghai, 200433, P.R. China |
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| Abstract: | Electric-field-induced photoluminescent variation has been observed from the red-emitting dopant, 4-(di cyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM). The layered structure of Al/tris-(8-hydroxyquinoline) aluminum (Alq)/DCM-doped Alq (Alq:DCM)/indium tin oxide studied, exhibits relatively enhanced red emission when a voltage is applied such that the electric field runs directly from the Alq:DCM layer to the Alq layer, and relatively enhanced green emission in the opposite direction of the field . This phenomenon is attributed to field-enhanced aggregation and permeation of DCM molecules due to the polarity of the molecule. PACS 78.55.Kz; 68.55.Ln; 85.60.Jb; 78.66.Qn; 78.20.Jq |
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