期刊
CHEMISTRY OF MATERIALS
卷 19, 期 19, 页码 4827-4832出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm0715500
关键词
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A new thermally cross-linkable copolymer containing reactive benzocyclobutene (BCB) units and the well-known hole-transporting moiety N,M '-bis(3-methylphenyl)-N,N '-diphenylbenzidine) (TPD) was synthesized and characterized. Thermal annealing of spun-cast films of the copolymer, followed by cross-linking at 200 degrees C, led to insoluble polymer films with a smooth surface. Green emitting fluorescent OLEDs were fabricated using the new cross-linkable polymer and compared with conventionally prepared devices. Using the thermally cross-linked copolymer as a hole-transporting layer, solution processed multilayer light emitting diodes were prepared that exhibited high performance with 10.4% external quantum efficiency at a brightness of 350 cd/m(2).
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