Issue 41, 2013

A highly conducting organic metal derived from an organic-transistor material: benzothienobenzothiophene

Abstract

BTBT ([1]benzothieno[3,2-b][1]benzothiophene) is an organic semiconductor that realizes high mobility in organic transistors. Here we report that the charge-transfer (CT) salt, (BTBT)2PF6, shows a high room-temperature conductivity of 1500 S cm−1. This compound exhibits a resistivity jump around 150 K, but when it is covered with Apiezon N grease the resistivity jump is suppressed, and the metallic conductivity is maintained down to 60 K. Owing to the very high conductivity, the ESR signal shows a significantly asymmetric Dysonian lineshape (A/B ≅ 3) even at room temperature. Since most organic conductors are based on strong electron donors, it is remarkable that such a weak electron donor as BTBT realizes a stable and highly conducting organic metal.

Graphical abstract: A highly conducting organic metal derived from an organic-transistor material: benzothienobenzothiophene

Supplementary files

Article information

Article type
Paper
Submitted
10 Jul 2013
Accepted
03 Sep 2013
First published
03 Sep 2013

Phys. Chem. Chem. Phys., 2013,15, 17818-17822

A highly conducting organic metal derived from an organic-transistor material: benzothienobenzothiophene

T. Kadoya, M. Ashizawa, T. Higashino, T. Kawamoto, S. Kumeta, H. Matsumoto and T. Mori, Phys. Chem. Chem. Phys., 2013, 15, 17818 DOI: 10.1039/C3CP52881B

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