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Abstract: Organic photovoltaics (PV) have been extensively studied in recent years, as they have the potential to provide a less expensive alternative to their inorganic counterparts. The goal of this study is to maximize the power conversion efficiency of a well-studied bulk heterojunction solar active layer blend, poly(3-hexylthiophene):1-(3-methoxy-carbonyl)-propyl-1-phenyl-(6, 6) C61, (P3HT: P... read moreCBM), by employing an array of different time-varying annealing temperature profiles in a systematic manner. The Design of Experiments (DoE) methodology has enabled the development of a statistical model that relates the response variable (in this case the PV power conversion efficiency) to the experimental factors that were varied (final annealing temperature, heating rate) and can be used to predict PV efficiency values at different operating conditions. It has been found that higher power conversion efficiencies can, in fact, be achieved through the use of time-varying annealing profiles as compared to the efficiency obtained using a constant temperature anneal.
Thesis (M.S.)--Tufts University, 2011.
Submitted to the Dept. of Chemical and Biological Engineering.
Advisors: Matthew Panzer, and Christos Georgakis.
Committee: Jeffrey Hopwood.
Keywords: Engineering, Statistics, and Alternative energy.read less
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