TY - GEN
T1 - Potential of Chemical Rounding for the Performance Enhancement of a Monolithic Perovskite/Bifacial N-PERT Si Tandem Cell
AU - Lee, Hyunju
AU - Song, Inseol
AU - Lee, Sang Won
AU - Bae, Soo Hyun
AU - Hyun, Ji Yeon
AU - Kang, Yoonmook
AU - Lee, Haeseok
AU - Kim, Donghwan
AU - Ogura, Atsushi
AU - Ohshita, Yoshio
N1 - Funding Information:
The authors thank the staffs of Collaborative Clean Room at Toyota Technological Institute for experimental support on sample fabrication. This work has been supported by the Research Center for Smart Energy Technology at Toyota Technological Institute and the New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) granted financial from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20163030014020).
Publisher Copyright:
© 2018 IEEE.
PY - 2018/11/26
Y1 - 2018/11/26
N2 - We have investigated the effects of chemical rounding on the performance of bifacial n-PERT Si cells with a random-pyramid textured p + -emitter. From experimental results, we found that solar-weighted reflectanceR SW of pyramid textured p + -emitters passivated with an AlOx/SiNx:H stack increases and short circuit current densityJ sc of bifacial n-PERT Si cells with an AlOx/SiNx:H stack-passivated textured p + -emitter consequently decreases as a function of chemical rounding time. However, the loss inJ sc is fully offset by the increased fill factor FF, and the efficiency of the 200-sec-rounded cells is consequently enhanced, compared to the non-rounded cells. In addition, the deposition of an indium tin oxide layer on the non-rounded and rounded p+- emitters passivated with an AlOx/SiNx:H stack can reduce reflectance largely in the near-infrared region. Based on the experimental results, although we would need further studies, it could be expected that cell efficiency of a bifacial n-PERT Si bottom cell and its monolithic tandem cell with a perovskite top cell would be improved without additional complicated and costly processes if chemical rounding and boron doping processes are properly optimized.
AB - We have investigated the effects of chemical rounding on the performance of bifacial n-PERT Si cells with a random-pyramid textured p + -emitter. From experimental results, we found that solar-weighted reflectanceR SW of pyramid textured p + -emitters passivated with an AlOx/SiNx:H stack increases and short circuit current densityJ sc of bifacial n-PERT Si cells with an AlOx/SiNx:H stack-passivated textured p + -emitter consequently decreases as a function of chemical rounding time. However, the loss inJ sc is fully offset by the increased fill factor FF, and the efficiency of the 200-sec-rounded cells is consequently enhanced, compared to the non-rounded cells. In addition, the deposition of an indium tin oxide layer on the non-rounded and rounded p+- emitters passivated with an AlOx/SiNx:H stack can reduce reflectance largely in the near-infrared region. Based on the experimental results, although we would need further studies, it could be expected that cell efficiency of a bifacial n-PERT Si bottom cell and its monolithic tandem cell with a perovskite top cell would be improved without additional complicated and costly processes if chemical rounding and boron doping processes are properly optimized.
KW - AlOx passivation
KW - Chemical rounding
KW - bifacial n-PERT Si solar cell
KW - perovskite/silicon tandem cell
KW - pyramid textured p+-emitter
UR - http://www.scopus.com/inward/record.url?scp=85059889630&partnerID=8YFLogxK
U2 - 10.1109/PVSC.2018.8547592
DO - 10.1109/PVSC.2018.8547592
M3 - Conference contribution
AN - SCOPUS:85059889630
T3 - 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC
SP - 2039
EP - 2044
BT - 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018
Y2 - 10 June 2018 through 15 June 2018
ER -
