Journal
APPLIED PHYSICS LETTERS
Volume 76, Issue 21, Pages 2985-2987Publisher
AMER INST PHYSICS
DOI: 10.1063/1.126553
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We have fabricated highly efficient organic light-emitting diodes (LEDS) using in situ thermally polymerized hole transporting materials containing triphenylamine/tetraphenyldiaminobiphenyl as side chains. Double-layer LEDs made with these thermally polymerized polymers as the hole transporting layer and tris(8-hydroxyquinoline) aluminum as the emitting layer showed comparable brightness but lower turn-on voltages and better quantum efficiencies than the device made with the conventional hole transporting molecule, N-N'-diphenyl-N,N'-bis(3-methylphenyl)(1,1'-biphenyl)-4,4'-diamine. (C) 2000 American Institute of Physics. [S0003-6951(00)03121-1].
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