Enhancement of electron transport by horizontal molecular orientation of oxadiazole planar molecules in organic amorphous films

Daisuke Yokoyama, Akio Sakaguchi, Michio Suzuki, Chihaya Adachi

研究成果: Contribution to journalArticle査読

53 被引用数 (Scopus)

抄録

To demonstrate the effect of molecular orientation on charge transport characteristics in vacuum-deposited organic amorphous films, the electrical and optical properties of films of two oxadiazole derivatives were investigated. One of them has bulky tert-butyl terminals and forms an isotropic film, whereas the other has planar bipyridyl terminals and forms a highly anisotropic film. The very large optical anisotropy of the latter means that the planar molecules stack horizontally, leading to large overlaps of π -orbitals and more than 30 times higher electron mobility though the geometric and electronic structures of the main conformers of the two derivatives are quite similar.

本文言語英語
論文番号243303
ジャーナルApplied Physics Letters
95
24
DOI
出版ステータス出版済み - 12 14 2009

All Science Journal Classification (ASJC) codes

  • 物理学および天文学(その他)

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