Abstract:
The
rapid improvement of perovskite solar cells in terms of power conversion
efficiency (PCE) makes them a promising material for further efficiency
enhancement for silicon photovoltaic technology by using a tandem approach. In
a traditional monolithic perovskite/c-Si tandem device, the perovskite top cell
has to be deposited onto a flat c-Si bottom cell to avoid bad electrical
contact, which, however, greatly limits the photocurrent due to bad optical
matching.
In
this study, we present a perovskite/silicon tandem solar cell with electrically
flat and optically rough interlayer. It is realized by introducing front
pyramid texture on c-Si bottom cell but with a thick NiOhole transfer layer, which
keeps the perovskite layer electrically flat. In addition, a textured
polydimethylsiloxane (PDMS) anti-reflection foil covers the tandem solar cell. Our
results show that Device B can reach a matched photocurrent density as high as
19.63 mA/cm2, as shown in Fig.2. Our results also show that Device A
suffers from large reflection losses and consequently has a relatively low
matched device current density of 17.24mA/cm2. As compared to the
traditional device, the matched current density in our proposed tandem solar
cell is increased by over 13.5%, which can be attributed to the proper light
management techniques.
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Biography:
Xiaowei Guo received his M.S. and Ph. D. degree from Sichuan University, China, in 2004 and 2007, respectively. Then he joined University of Electronic Science and Technology of China (UESTC). In 2009, he became an associate Professor.In 2010, he was a visiting professor at MIT, USA. In 2011 he worked as a BK researcher at Seoul National University for two years. In 2013, he came back to UESTC. Now he becamesenior research investigatorin the Center of Optoelectronic technology and engineering at UESTC. His research interests includingOptoelectronic material and devices, energy material and techniques, micro and nanofabrication techniques, and so on. He has authored and co authored more than 60 journal papers and made in excess of 10 contributions to international conferences including 2 keynote speeches, 4 invited speeches, and 2 session chairs. He currently holds 5 patents, 6 pending patents.He was recipient of Excellence in Chinese Innovation and Entrepreneurship Competition(Zhejiang Province)in 2016 and wasinvolved in Seal of Excellence awarded by EU commission in 2017. |
