Enhancement of bipolar carrier transport in oligofluorene films through alignment in the liquid-crystalline phase

Li Yin Chen, Wen Yi Hung, Yu Ting Lin, Chung Chih Wu, Teng Chih Chao, Tsung His Hung, Ken Tsung Wong

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

We investigate the formation of aligned liquid-crystal glasses of an oligofluorene and perform comparative studies of carrier-transport properties of the oligofluorene in both amorphous films and glassy liquid-crystal films. With mesophase-mediated molecular alignment, the bipolar carrier-transport capability of oligofluorene solid films is enhanced by more than an order of magnitude. High bipolar carrier mobilities, up to 2.0× 10-2 cm2 V s for holes and up to 2.3× 10-2 cm2 V s for electrons, are observed in the aligned glassy liquid-crystal films.

Original languageEnglish
Article number112103
JournalApplied Physics Letters
Volume87
Issue number11
DOIs
StatePublished - 12 Sep 2005

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