Water-Soluble Polythiophene-Single Walled Carbon Nanotube Bulk Heterojunction
Abstract:Two symmetrical terminal electrodes made of indium tin oxide (ITO) were employed to study the current–voltage characteristics of a bulk-heterojunction consisting of water soluble polythiophene and single walled carbon nanotubes (SWCNT). However, the current–voltage curves were asymmetrical, attributed to the polarization induced by the initial bias voltage. The polymer-SWCNT heterojunction were superior to the pristine polymer in both dark conductivity and photoconductivity by two orders of magnitude. Additionally, the open-cell voltage of 0.075 V was observed from the heterojunction even though the electrodes were symmetrical. The high conductivity and photoresponse originated from the high conductivity, high interconnectivity and hole doping capability of CNT.
Document Type: Research Article
Publication date: October 1, 2011
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