CRCU

Chemical Research in Chinese Universities ›› 2004, Vol. 20 ›› Issue (1): 114-117.

• Articles • Previous Articles     Next Articles

Photoluminescence and Electroluminescence Properties of 2,5-Bis[2,2′-bis(5-phenyl)-1,3,4-oxadiazole] Thiophene(T-OXD)and T-OXD/Poly(9-vinylcarbazole) Blends

ZHANG Zhi-ming1, MA Yu-guang2, LI Guo-wen2, SHEN Jia-cong2   

  1. 1. College of Chemistry and Chemical Engineering, Ocean University of Qingdao, Qingdao 266003, P. R. China;
    2. Key Laboratory for Supramolecular Structure and Materials of Ministry of Education, Jilin University, Changchun 130023, P. R. China
  • Received:2003-01-07 Online:2004-02-24 Published:2011-08-06
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.20274015, 20004004) and Research Fund of Jilin University.

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Abstract: The photoluminescence(PL) and the electroluminescence(EL) properties of a novel organic compound, 2,5-bis(2,2′-bis(5-phenyl)-1,3,4-oxadiazole(T-OXD), were studied in chloroform and in a solid thin film. The PL and the EL properties of T-OXD/poly(9-vinylcarbazole)(PVK) blends were also studied, which contained various contents of T-OXD. The PL maximum emission peaks of T-OXD/PVK blends show gradual bathochromtic-shift with the increase of the T-OXD content. The EL spectra of T-OXD/PVK devices are similar to their PL spectra, and all the EL maximum emission peaks show bathochromtic-shift compared with the corresponding PL spectra, which is ascribed to the formation of electroplex. The turn-on voltages for ITO/T-OXD:PVK/Al devices decreased from 13.5 V of the device cotaining 0.1% T-OXD(mass fraction) to 5 V of the device containing 5% T-OXD, which suggests that T-OXD improves the energy level match between T-OXD and PVK and enhances the emission efficiency. The experimental results indicate that T-OXD can be used as a good electron transporting material.

Key words: 2,2′(2,5-Thiophenediyl) bis(5-phenyl)-1,3,4-oxadiazole(T-OXD), Photoluminescence, Electroluminescence, Electroplex, LEDs