CRCU

Chemical Research in Chinese Universities ›› 2004, Vol. 20 ›› Issue (6): 790-794.

• Articles • Previous Articles     Next Articles

Electroluminescence from Exciplex on the Interface Between TPD and La(PMIP)3(Bipy)

GAO De-qing1, BIAN Zu-qiang1, HUANG Yan-yi1, HUANG Chun-hui1, IBRAHIM K.2, LIU Feng-qin2   

  1. 1. State Key Laboratory of Rare Earth Materials Chemistry and Applications, Peking University, Beijing 100871, P. R. China;
    2. Photoemission Spectroscopy Station, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, P. R. China
  • Received:2003-12-17 Online:2004-12-24 Published:2011-08-06
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.20221101, 20471004, 50372002), State "863" Program(No.2022AA324080) and the Doctorial Program Foundation of High Education(No.20030001065).

PDF (PC)

Abstract: The bilayer organic light-emitting diode(OLED) with a blue fluorescent lanthanum complex, tris(1-phenyl-3-methyl-4-isobutyryl-5-pyrazolone)-(2,2′-dipyridyl) lanthanum [La(PMIP)3(Bipy)], as a light emitting material and N,N′-diphenyl-N,N′-bis(3-methylphenyl)-1,1′-biphenyl-4,4′-diamine(TPD) as a hole transporting material emits bright green light instead of blue light. The data of the absorption, the photoluminescence(PL) and the photoluminescence excitation(PLE) spectra of TPD, La(PMIP)3(Bipy) and the mixture of TPD and La(PMIP)3(Bipy)(molar ratio 1:1) prove that the electroluminescent emission originates from the exciplex on the interface between TPD and La(PMIP)3(Bipy). By improving device configuration with tris(8-hydroxyquinoline) aluminum(ALQ) as an electron transporting material, a maximum luminance of 800 cd/m2 was obtained.

Key words: Electroluminescence, Photoluminescence, Lanthanum complex