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Title: Application of Solution-based Electrical p-type Doping to Organic Tandem Solar Cells
Committee:
Dr. Kippelen, Advisor
Dr. Rohatgi, Chair
Dr. Shen
Abstract: The objective of the proposed research is to simplify the device architecture and fabrication processes of solution processed organic tandem solar cells using solution-based electrical doping technique. While tandem structure has been applied to organic solar cells to improve the device performance, multilayer deposition is inevitable due to an additional charge recombination layer. One approach to simplify the device architecture is to integrate the charge (hole, electron) collecting functions into the photoactive layer. Polymeric semiconducting films have been previously demonstrated to be electrically p-doped to a limited depth by post-process immersion in phosphomolybdic acid (PMA) solution. PMA doping will be studied and applied to organic tandem solar cells to embed the hole collecting region of the charge recombination layer into the photoactive layer of the sub-cell. Highly efficient organic tandem solar cells incorporating PMA-doping will be designed and optimized using optical simulation based on transfer matrix method.
