Prof Junsin YI

Prof Junsin YI

School of Electronic Electrical Engineering, Sungkyunkwan University South Korea

Silicon Thin-film Tandem Solar Cell Properties using Multi-scale architecture

Advanced light trapping concept is vital for high efficiency silicon thin film solar cell. Multiscale architecture such as nano, micro and macro sized texturing is required for increasing the saturation current density (Jsc) of the tandem cell. The use of multi-scale architecture increases the haze ratio as the light gets diffracted in all directions. The high aspect ratio of the multiscale architecure increases the surface area and hence the improvement in the saturation current density. All wavelength angular distribution function is improved to a great extent. The increase in saturation current density is due to the efficient collection of photons injected into the cell. The solar cell was fabricated using multi-scale architecture and the best cell yielded an open circuit voltage of 1.405 V, saturation current density of 15.36 mA/cm2, fill factor of 71.5% and efficiency of 15.38%


Junsin YI, is a Professor at School of Electronic Electrical Engineering, Sungkyunkwan University South Korea. Prof. Junsin Yi received his Phd from New York State University, U.S.A in 1994 under the guidance of Wayne Anderson. Since 1995 he is with Sungkyunkwan University (SKKU) and his research interests include the development of novel solar cell concepts and fabrication processes of silicon solar cells including crystalline, thin film, heterojunction intrinsic thin film (HIT) and Thin Film Transistor. Prof. Junsin Yi has been honoured with numerous awards including the : SKKU fellow (2009 onwards), PVSEC scientist award (2009) for his outstanding contributions to the development of science and technology of photovoltaics. He has authored and co-authored more than 400 refereed journal and conference papers and patents. He is scientific committee member for several conferences and workshops in the field of photovoltaics.