期刊
APPLIED PHYSICS LETTERS
卷 81, 期 13, 页码 2319-2321出版社
AMER INST PHYSICS
DOI: 10.1063/1.1509117
关键词
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We demonstrate that an ultrathin photoaddressable polymer (PAP) layer with a thickness as small as 5 nm can be utilized for the monodomain alignment of thermotropic liquid crystalline polyfluorene. The optical anisotropies in absorption and emission are found to be independent of the PAP layer thickness within a range of 5 to 30 nm. On the other hand, decreasing the PAP layer thickness greatly improves the performance of polarized blue light-emitting diodes: With a PAP layer thickness of only 10 nm, the device turns on at 5 V and reaches a brightness of 100 cd/m(2) at 8 V with an efficiency of 0.66 cd/A. (C) 2002 American Institute of Physics.
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