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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.
Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.