Elucidating key factors of coherent conduction in polymer semiconductors and modeling of the conduction mechanisms

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H05455
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: Yamagata University (2016-2017); The University of Tokyo (2015)
• Principal Investigator: Matsui Hiroyuki 山形大学, 大学院有機材料システム研究科, 准教授 (80707357)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 有機電界効果トランジスタ / ポリマー半導体 / バンド伝導 / OFETs / OTFTs / polymer semiconductors / band transport

Outline of Final Research Achievements

Polymer semiconductor, in which conjugated organic molecules are polymerized, is an electronic material excellent in solubility, homogeneous film formation by solution processes, low temperature processability, and mechanical flexibility. However, having many structural disorders and defects, polymer semiconductor had been believed to follow hopping transport model, where the maximum mobility is at most several cm2/Vs. In this study, we have clarified that band transport can be realized in some polymer semiconductors by the measurements of mobility exceeding 10 cm2/Vs, its temperature dependence and Hall effect. The relationship between structure and band conduction was also analyzed in detail.

Free Research Field

有機エレクトロニクス、応用物理