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Practical solar cells require larger active areas than ones in the R&D stage in laboratories. However, the enlargement lowers conversion efficiency because of the following two reasons: (1) increase of resistive loss in the transparent conductive electrode caused by the longer distance for the photogenerated carriers to pass and (2) active area loss caused by shadows of collector electrodes laid on to reduce the previous resistive loss. In the present study, we have constructed an advisable modeling method to calculate output power of medium-sized solar cells and optimized geometry of the collector electrodes. Results of the modeling taught us a possible improvement of the output power by over 10%. These simulated results were reproduced by electrochemical experiments

Over 10% Gain of Output Power of Medium-Sized Solar Cells by an Improvement of Geometry of Collector Electrodes