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Thermal Annealing Effects of Molybdenum Oxide Interfacial Layer Based on Organic Solar Cells

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Organic photovoltaic (OPV) cells were fabricated with a molybdenum oxide (MoO x ) interfacial layer instead of a PEDOT:PSS layer to improve power conversion efficiency (PCE) and long-term stability. Physical parameters of organic solar cells such as fill factor, current density, and open circuit voltage were changed to improve efficiency by transforming the crystal structure of the molybdenum oxide interfacial layer through thermal annealing. PEDOT:PSS has been known to cause acid etching problems on the ITO which degrades the device's overall longevity. Additionally, we have confirmed that when various thermal annealing conditions were applied to the molybdenum oxide layer, the fill factor and current density were continuously improved. In our experiments, the device with a thermal annealing temperature of 250 °C for 30 minutes exhibited a PCE of 3.18% under AM 1.5G illumination.
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Document Type: Research Article

Publication date: November 1, 2013

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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