Kwanyong Seo
Silicon Thin Film
Ulsan National Institute of Science and Technology (UNIST)
50 UNIST-gil 113-401, Ulsan, Republic of Korea 44919
Email: kseo@unist.ac.kr
Biography
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Professional Experience 2022~ Professor of School of Energy and Chemical Engineering, UNIST 2017~2022 Associate Professor of School of Energy and Chemical Engineering, UNIST 2013~2017 Assistant Professor of School of Energy and Chemical Engineering, UNIST 2009~ 2012 Harvard University, School of Engineering and Applied Sciences Postdoctoral research, Advisor: Prof. Kenneth B. Crozier 2008~2009 KAIST, Dept. of Chemistry Postdoctoral research, Advisor: Prof. Bongsoo Kim 2004~2005 UC Berkeley, Dept. of Chemistry Visiting research, Advisor: Prof. Peidong Yang
Educational Background 2004~2008 KAIST, Ph. D. in Chemistry Advisor: Prof. Bongsoo Kim 2002~2004 KAIST, M. S. in Chemistry Advisor: Prof. Bongsoo Kim 1997~2002 Korea National University of Education, B. S. in Chemistry Graduated summa cum laude
Research Interests ▪ Neutral-Color Transparent Crystalline Silicon Solar cells for Smart Window ▪ Optically Enhanced Flexible Crystalline Silicon Solar Cells ▪ Crystalline Silicon Radial Junction Photovoltaics with Microwires ▪ Dopant-Free Carrier Selective Contact Devices by Atomic Layer Deposition ▪ Crystalline Silicon based Water Splitting for H2 and H2O2. |
Abstract for Presentation
Light Management with Surface Structure for High-efficiency Flexible Crystalline-Silicon Photovoltaics
Flexible solar cells have been intensively studied in recent years for its applicability on curved or uneven surfaces. Crystalline silicon (c-Si) solar cells have been commercialized because of their low manufacturing cost, long lifespan of over 20 years, and high power-conversion efficiency (PCE) of ≤26.7%. However, the development of flexible solar cells using c-Si substrate poses an intrinsic problem resulting from its rigid material characteristic. In recent years, flexible solar cells using thin c-Si wafers have become more attractive with archiving a higher PCE than that of the emerging flexible solar cells. In addition, the mechanical flexibility can be realized using a thin c-Si film with a thickness of ≤50 mm, which is a quarter of the substrate thickness of conventional c-Si solar cells. Nonetheless, thin c-Si-based flexible solar cells faced critical challenges because of severe light absorption loss in the entire wavelength region (300–1100 nm) because of the low absorption coefficient and surface reflection of c-Si. Thus, in this talk, I will introduce high aspect-ratio Si microwires and 3-dimensional transparent optical films as promising surface structures for the efficient trapping of incident light in thin c-Si films. [1-2] Moreover, the principles regarding the improvement in light absorption of these surface structures were discussed along with the implementable strategies for maximizing PCE of the c-Si flexible solar cells. [3]
Figure 1. Schematic image of flexible thin c-Si solar cells with microwires.
References
[1] I. Hwang, H. -D. Um, B. -S. Kim, M. Wober, and K. Seo, Energy & Environ. Sci., 11 (2018), 641
[2] I. Hwang, Y. Jeong, Y. Shiratori, J. Park, S. Miyajima*, I. Yoon, and K. Seo, Cell Rep. Phys. Sci., 1 (2020), 100242
[3] H. -D. Um, I. Hwang, D. Choi, and K. Seo, Acc. Mater. Res., 2, (2021), 701
WELCOME TO CHINA TO ATTEND THE ICANS
23-26 August, Nanjing, China
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