TITLE

Solution processed nanogap organic diodes based on liquid crystalline materials

AUTHOR(S)
Yi-Fei Wang; Hiroaki Iino; Jun-ichi Hanna
PUB. DATE
September 2017
SOURCE
Applied Physics Letters;9/25/2017, Vol. 111 Issue 13, p133301-1
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Co-planar nanogap organic diodes were fabricated with smectic liquid crystalline materials of the benzothienobenzothiophene (BTBT) derivative by a spin-coating technique. A high rectification ratio of the order of 106 at ±3V was achieved when a liquid crystalline material of 2,7-didecyl benzo-thieno[ 3,2-b][1]benzothiophene (10-BTBT-10) was used in a device configuration of Al/10-BTBT- 10/pentafluorobenzenethiol-treated Au on a glass substrate, which was 4 orders higher than that of the device based on non-liquid crystalline materials of 2,7-dibutyl benzothieno[3,2-b][1]benzothiophene (4-BTBT-4) and BTBT. Similar results were also observed when another liquid crystalline material of ω, ω...-dioctylterthiophene (8-TTP-8) and a non-liquid crystalline material of terthiophene (TTP) were used. These improved rectifications can be ascribed to the self-assembly properties and controllable molecular orientation of liquid crystalline materials, which made uniform perpendicular oriented polycrystalline films favorable for superior charge transport in nano-channels.
ACCESSION #
125442761

 

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