Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2000/07/25 Vol. E83-CNo. 7pp. 1088-1093 Type of Manuscript: Special Section PAPER (Special Issue on Organic Molecular Electronics for the 21st Century) Category: Ultra Thin Film Keyword: poly(3-hexylthiophene), photocarrier, hole mobility, time-of-flight method, field dependence,