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Analysis on the Photovoltaic Property of Si Quantum Dot-Sensitized Solar Cells
Hyunwoong Seo,Daiki Ichida,Giichiro Uchida,Kunihiro Kamataki,Naho Itagaki,Kazunori Koga,Masaharu Shiratani 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.
This work first introduced Si quantum dots (QDs) for QD-sensitized solar cells (QDSCs). However, the particle size of Si QDs, which had visible light absorption, was relatively large. The paint-type Si QDSC was proposed in this work because Si QDs could not penetrate into nano-porous TiO2 network. Si QDs were synthesized by multi-hollow plasma discharge CVD and mixed with TiO2 paste. For better performance, thickness of Si-TiO2 layer was varied by coating times and Si-TiO2 films were optically and electrically analyzed. As a result, 6 times screen printed Si-TiO2 film had the best performance with the smallest internal impedance and the highest photon to current efficiency.