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Title: Organic Photovoltaic Devices with a Simplified Geometry
Committee:
Dr. Kippelen, Advisor
Dr. Peterson, Chair
Dr. Brand
Abstract: The objective of the proposed research is to design and fabricate highly efficient and simplified single-junction and tandem organic photovoltaic devices with a reduced number of interlayers. The preliminary research shows a simple post-process immersion technique for controlled electrical p-type doping of the photoactive layer that forms a hole-collecting region. Directly adding a small concentration of a polymer containing aliphatic amines into the photoactive layer blend forms a physisorbed and self-assembled electron-collecting layer. The combination of these techniques demonstrates the first efficient single-layer organic photovoltaic device. An optimized tandem structure designed from these stacked single layer devices can have increased absorption, high open-circuit voltage, and improved efficiency while simultaneously lowering the cost and complexity associated with its fabrication.
