Interface Optoelectronics for Tandem Solar Cells by Perovskite and Silicon

Seigo Ito

University of Hyogo

Abstract: In order to fabricate tandem solar cells by perovskite and silicon, 5-mm square-shaped silicon solar cells have been fabricated by a facile method.  Afterward, engineering of photonics for antireflection and electronics for extraction of the hole using a thin Au layer have been performed for two- and four-terminal tandem solar cells using CH3NH3Pb(I-Br)3 perovskite (top cell) and p-type single crystal silicon (c-Si) (bottom cell) by mechanically stacking.  Highly transparent connection multilayers of Au and ITO films were depositted at the interface to be a point-contact tunneling junction between the rough perovskite and flat silicon solar cells.  Moreover, we have analyzed the sputtering effect on spiro-OMeTAD HTM layer, which can deteriorated the photovoltaic effects of tandem devise significantly.  Also, the mechanically stacked tandem solar cells with several configurations as Fig. 1 were fabricated with MoOx and ITO interface layers.  In the conference, the detail results of optoelectronics phenomena about silicon and perovskite solar cells will be disclosed.  

Figure 1 .Structure of tandem solar cells using perovskite and silicon.

Biography: Education:

Bachelor of Engineering in Department of Hydrocarbon Chemistry, Faculty of Engineering, Kyoto University,

Kyoto, Japan, 1995

 Master of Engineering in Department of Chemistry and Biochemistry, School of Engineering, the University of

Tokyo, Tokyo, Japan, 1997

 PhD (Engineering) in Department of Chemistry and Biochemistry, School of Engineering, the University of

Tokyo, Tokyo, Japan, 2000