TY - JOUR
T1 - Carrier transport and high-efficiency electroluminescence properties of copolymer thin films
AU - Chen, Baijun
AU - Liu, Yunqi
AU - Lee, C. S.
AU - Yu, Gui
AU - Lee, S. T.
AU - Li, Hongyu
AU - Gambling, W. A.
AU - Zhu, Daoben
AU - Tian, He
AU - Zhu, Weihong
PY - 2000/3/1
Y1 - 2000/3/1
N2 - A novel copolymer with moieties capable of charge transport and electroluminescence was synthesized. The drift mobilities of electron and hole in the spin-coated films of the copolymer on silicon substrate have been determined by the time-of-flight technique. The shape of the photo-current curves obtained for the transport of both electron and hole is typical for dispersive transport in organic polymers. Under an electrical field strength of 5.0×105 V/cm, the drift mobility of electron and hole is 4.78×10-6 and 3.46×10-6 cm2/V s, respectively. A high-efficiency electroluminescent device with the bi-layer structure of ITO/copolymer/2-(4-biphenylyl)-5-(4-tert-butylphenl)-1,3,4,-oxadiazole (PBD) /LiF/Al was fabricated. The device emitted a bright blue-green light peaking at wavelength of 496 nm, originating from copolymer with a maximum current efficiency of 10 cd/A and a maximum luminescence efficiency of 2.9 lm/W at the DC drive voltage of 12 V.
AB - A novel copolymer with moieties capable of charge transport and electroluminescence was synthesized. The drift mobilities of electron and hole in the spin-coated films of the copolymer on silicon substrate have been determined by the time-of-flight technique. The shape of the photo-current curves obtained for the transport of both electron and hole is typical for dispersive transport in organic polymers. Under an electrical field strength of 5.0×105 V/cm, the drift mobility of electron and hole is 4.78×10-6 and 3.46×10-6 cm2/V s, respectively. A high-efficiency electroluminescent device with the bi-layer structure of ITO/copolymer/2-(4-biphenylyl)-5-(4-tert-butylphenl)-1,3,4,-oxadiazole (PBD) /LiF/Al was fabricated. The device emitted a bright blue-green light peaking at wavelength of 496 nm, originating from copolymer with a maximum current efficiency of 10 cd/A and a maximum luminescence efficiency of 2.9 lm/W at the DC drive voltage of 12 V.
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U2 - 10.1016/S0040-6090(99)00990-6
DO - 10.1016/S0040-6090(99)00990-6
M3 - RGC 21 - Publication in refereed journal
SN - 0040-6090
VL - 363
SP - 173
EP - 177
JO - Thin Solid Films
JF - Thin Solid Films
IS - 1
T2 - The Asia-Pacific Symposium on Organic Electroluminescent Materials and Devices
Y2 - 8 June 1999 through 11 June 1999
ER -
