Microscopic signature of metallic state in semicrystalline conjugated polymers doped with fluoroalkylsilane molecules

Hisaaki Tanaka; Masataka Hirate; Shun Watanabe; Shin-Ichi Kuroda

doi:10.1002/adma.201304691

Microscopic signature of metallic state in semicrystalline conjugated polymers doped with fluoroalkylsilane molecules

Adv Mater. 2014 Apr 16;26(15):2376-83. doi: 10.1002/adma.201304691. Epub 2013 Dec 11.

Authors

Hisaaki Tanaka¹, Masataka Hirate, Shun Watanabe, Shin-Ichi Kuroda

Affiliation

¹ Department of Applied Physics, Nagoya University, Chikusa, Nagoya, 464-8603, Japan.

PMID: 24327521
DOI: 10.1002/adma.201304691

Abstract

Fluoroalkylsilane (FTS) acts as an efficient p-type dopant for organic semiconductors. FTS-doped films of the semicrystalline PBTTT polymer exhibit relatively high conductivities. We demonstrate that highly doped PBTTT films exhibit a metallic nature with clear Pauli paramagnetism as observed microscopically using electron spin resonance spectroscopy. The metallic state is realized within crystalline grains, as confirmed from the anisotropy of the ESR signal.

Keywords: chemical doping; conjugated polymers; electron spin resonance; polarons; self-assembled monolayer.

Publication types

Research Support, Non-U.S. Gov't