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Buffer Layer of PEDOT:PSS/Graphene Composite for Polymer Solar Cells

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Abstract:

High-efficiency polymer solar cells were made with a hydrophilic graphene oxide (GO) doped in poly(ethylene dioxythiophene) (PEDOT)-polystyrene sulfonic acid (PSS) composites using a structure of indium tin oxide/PEDOT:PSS:GO (40 nm)/poly(3-hexylthiophene-1,3-diyl) (P3HT)-[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) (1:0.6, 100 nm)/LiF (1 nm)/Al (70 nm). The energy conversion efficiency was enhanced from 2.1 to 3.8% by doping GO into the PEDOT:PSS buffer layer under AM1.5G 100 mW cm−2 illumination in air. The pre-annealing of GO makes energy conversion efficiency 1.8 times that of the device based on a pristine PEDOT:PSS buffer layer. Because of the low price and ease of preparation, soluble graphene will be a promising buffer layer used in photovoltaic applications. Furthermore, it can be used in other electronic applications.

Keywords: BUFFER LAYER; ENERGY CONVERSION EFFICIENCY; GRAPHENE; ORGANIC PHOTOVOLTAIC DEVICE; ORGANIC SOLAR CELL

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.2107

Publication date: March 1, 2010

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  • 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.
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