[17a-Z23-1~11] 12.2 Characterization and Materials Physics

[17a-Z23-11] ESR Observation of Charge and Spin States of Carriers in High-Mobility Semicrystalline Conjugated Polymer P3HT

〇Shin-ichi Kuroda¹, Hisaaki Tanaka², Yukihiro Shimoi³ (1.TPCRI, 2.Nagoya Univ, 3.AIST)

Keywords:semicrystalline conjugated polymer, field-induced ESR, charge carrier

Regioregular polyhexylthiophene (P3HT) attracts attention as a high-mobility semicrystalline polymer. So far, we have reported the spin-charge relationship and dynamics of charge carriers (polarons), or the interfacial molecular orientation using field-induced ESR (FI-ESR) method. In particular, we have found a phenomenon in which carriers change from polarons to nonmagnetic bipolarons under high-concentration charge injection. Here we report the effects on these electronic states and dynamics of charge carriers by employing polymers with a higher molecular weight than before.