Abstract
The 25% conversion efficiency of silicon solar cells is attributed to monocrystalline silicon wafers. These wafers have been utilized in the development of heterojunction with intrinsic thin-layer solar cells. To harness electrical power efficiently from a solar cell, it is essential not only to enhance its performance but also to significantly reduce its production costs. It is projected that the thickness of the Si wafer will gradually approach a minimum value of approximately 100 μm in the future. As a result, reducing the as-cut wafer thickness can lead to a more efficient utilization of silicon. In this paper, we present an approach for surface modification using a thin wafer, specifically for the application of rear-emitter silicon heterojunction (RE-SHJ) solar cells. RE-SHJ solar cells often experience a reduction in current density due to optical losses, such as the absorption in each layer and reflections on both the front and rear sides. For the application of RE-SHJ solar cells, we fabricated different pyramid sizes using a texturing solution after polishing the rear surface. The surface modifications in this study incorporated both front-side texturing and rear-side polishing. These modifications can contribute to enhanced efficiency, even with a thin wafer.
Similar content being viewed by others
Data Availability
The data that support the findings of this study are available from the corresponding author upon reasonable request.
References
http://taiyangnews.info/technology/25-2-efficiency-for-gs-solar-hjt-solar-cell/
M. Taguchi, A. Yano, S. Tohoda, K. Matsuyama, Y. Nakamura, T. Nishiwaki, K. Fujita, E. Maruyama, 24.7% record efficiency HIT solar cell on thin silicon wafer. IEEE J. Photovolt. 4(1), 96–99 (2014)
W. Duan, K. Bittkau, A. Lambertz, K. Qui, Z. Yao, P. Steuter, D. Qui, U. Rau, K. Ding, Improved infrared light management with transparent conductive oxide/amorphous silicon back reflector in high-efficiency silicon heterojunction solar cells. Sol. RRL 5(1), 2000576 (2021)
H. Sai, Y. Sato, T. Oku, T. Matsui, Very thin crystalline silicon cells: a way to improve the photovoltaic performance at elevated temperatures. Prog. Photovolt. Res. Appl. 29, 1093 (2021)
H. Sai, T. Oku, Y. Sato, M. Tanabe, T. Matsui, K. Matsubara, Potential of very thin and high-efficiency silicon heterojunction solar cells. Prog. Photovolt. Res. Appl. 27, 1061 (2019)
H. Sai, H. Umishio, T. Matsui, Very thin (56 µm) silicon heterojunction solar cells with an efficiency of 23.3% and an open-circuit voltage of 754 mV. Sol. RRL 5, 2100634 (2021)
T. Mishima, M. Taguchi, H. Sakata, E. Maruyama, Development status of high-efficiency HIT solar cells. Sol. Energy Mater. Sol. Cells. 95, 18–21 (2011)
U. Chime, L. Wolf, V. Buga, D. Weigand, A. Gad, J. Köhler, A. Lambertz, W. Duan, K. Ding, T. Merdzhanova, U. Rau, O. Astakhov, How thin practical silicon heterojunction solar cells could be? Experimental study under 1 sun and under indoor illumination. Sol. RRL 6, 2100594 (2022)
A. Cruz, D. Erfurt, P. Wagner, A.B. Morales-Vilches, F. Ruske, R. Schlatmann, B. Stannowski, Optoelectrical analysis of TCO+ silicon oxide double layers at the front and rear side of silicon heterojunction solar cells. Sol Energy Mater. Sol. Cells 236, 111493 (2022)
A. Razzaq, T.G. Allen, W. Liu, Z. Liu, S.D. Wolf, Silicon heterojunction solar cells: techno-economic assessment and opportunities. Joule 6(3), 514 (2022)
W. Duan, A. Lambertz, K. Bittkau, D. Qui, K. Qui, U. Rau, K. Ding, A route towards high-efficiency silicon heterojunction solar cells. Prog. Photovolt. Res. Appl. 30, 384 (2022)
M. Taguchi, Review-development history of high efficiency silicon heterojunction solar cell: from discovery to practical use. ECS J. Solid State Sci. Technol. 10, 025002 (2021)
W. Long, S. Yin, F. Peng, M. Yang, L. Fang, X. Ru, M. Qu, H. Lin, X. Xu, On the limiting efficiency for silicon heterojunction solar cells. Sol. Energy Mater. Sol. Cells 231, 111291 (2021)
M. Ju, K. Mallem, S. Dutta, N. Balaji, D. Oh, E.-C. Cho, Y.H. Cho, Y. Kim, J. Yi, Influence of small size pyramid texturing on contact shading loss and performance analysis of Ag-screen printed mono crystalline silicon solar cells. Mater. Sci. Semicond. Proc. 85, 68–75 (2018)
J. Yang, H. Shen, L. Sun, Nanostructure-induced fast texturization of mono-crystalline silicon in low-concentration alkaline solution. Mater. Sci. Semicond. Proc. 94, 1–8 (2019)
A. Abdulkadir, A.A. Aziz, M.Z. Pakhuruddin, Impact of micro-texturization on hybrid micro/nano-textured surface for enhanced broadband light absorption in crystalline silicon for application in photovoltaics. Mater. Sci. Semicond. Proc. 105, 104728 (2020)
A.K. Dikshit, N.C. Mandal, S. Bose, N. Mukherjee, P. Chakrabarti, Optimization of back ITO layer as the sandwiched reflector for exploiting longer wavelength lights in thin and flexible (30 µm) single junction c-Si solar cells. Sol. Energy 193, 293–302 (2019)
P. Kowalczewski, L.C. Andreani, Towards the efficiency limits of silicon solar cells: How thin is too thin? Sol. Energy Mater. Sol. Cells 143, 260–268 (2015)
M. Ju, N. Balaji, Y.-J. Lee, C. Park, K. Song, J. Choi, J. Yi, Novel vapor texturing method for EFG silicon solar cell applications. Sol. Energy Mater. Sol. Cells 107, 366–372 (2012)
B. Schwartz, H. Robbins, Chemical etching of silicon: I the system, and. J. Electrochem. Soc. 123(12), 1903 (1976)
R. Luttge, Microfabrication for Industrial Applications: A Volume in Micro and Nano Technologies (Elsevier, Amsterdam, 2011)
M. Ju, N. Balaji, C. Park, H.T.T. Nguyen, J. Cui, D. Oh, M. Jeon, J. Kang, G. Shim, J. Yi, The effect of small pyramid texturing on the enhanced passivation and efficiency of single c-Si solar cells. RSC Adv. 6, 49831–49838 (2016)
R. Varache, C. Leendertz, M.E. Gueunier-Farret, J. Haschke, D. Muñoz, L. Korte, Investigation of selective junctions using a newly developed tunnel current model for solar cell applications. Sol. Energy Mater. Sol. Cells 141, 14–23 (2015)
R. Stangl, A. Froitzheim, M. Schmidt, W. Fuhs, Design criteria for amorphous/crystalline silicon heterojunction solar cells-a simulation study, in Proceedings of 3rd World Conference on Photovoltaic Energy Conversion (Osaka, Japan, 2003) p. 1005
A. Froitzheim, R. Stangl, L. Elstner, M. Schmidt, W. Fuhs, Interface recombination in amorphous/crystalline silicon solar cell, a simulation study, in Conference Record of the 29th IEEE Photovoltaic Specialists Conference (New Orleans, USA, 2002) p. 1238
L. Zhao, C.L. Zhou, H.L. Li, H.W. Diao, W.J. Wang, Role of the work function of transparent conductive oxide on the performance of amorphous/crystalline silicon heterojunction solar cells studied by computer simulation. Phys. Stat. Sol. A 205(5), 1215–1221 (2008)
A.H.T. Le, V.A. Dao, D.P. Pham, S. Kim, S. Dutta, C.P.T. Nguyen, Y. Lee, Y. Kim, J. Yi, Damage to passivation contact in silicon heterojunction solar cells by ITO sputtering under various plasma excitation modes. Sol. Energy Mater. Sol. Cells 192, 36–43 (2019)
Y. Zhang, C. Yu, M. Yang, H. Yan, J. Zhang, and X. Xu, Effects of n-type hydrogenated microcrystalline silicon oxide film on performance of a-Si/c-Si heterojunction solar cells, in IEEE 42nd Photovoltaic Specialist Conference (PVSC) (New Orleans, Louisiana, 2015), p. 1982
X. Yang, J. Chen, W. Liu, F. Li, Y. Sun, Single-side heterojunction solar cell with microcrystalline silicon oxide emitter and diffused back surface field. Phys. Status Solidi A 214, 1700193 (2017)
H. Park, M. Khokhar, E. Cho, M. Ju, Y. Kim, S. Kim, J. Yi, Computer modeling of the front surface field layer on the performance of the rear-emitter silicon heterojunction solar cell with 25% efficiency. Optik 205, 164011 (2020)
F. Wang, Y. Gao, Z. Pang, L. Yang, J. Yang, Insights into the role of the interface defects density and the bandgap of the back surface field for efficient p-type silicon heterojunction solar cells. RSC Adv. 7, 26776 (2017)
F. Meng, J. Liu, L. Shen, J. Shi, A. Han, L. Zhang, Y. Liu, J. Yu, J. Zhang, R. Zhou, Z. Liu, Front. Energy 11(1), 78–84 (2017)
X. Wang, Z. Liu, Z. Yang, J. He, X. Yang, T. Yu, P. Gao, J. Ye, Heterojunction Hybrid Solar cells by formation of conformal contacts between PEDOT:PSS and Periodic Silicon Nanopyramid arrays. Small. 14, 1704493 (2018)
Y. Kim, S. Jung, M. Ju, K. Ryu, J. Park, H. Choi, D. Yang, Y. Lee, J. Yi, The effect of rear surface polishing to the performance of thin crystalline silicon solar cells. Sol. Energy 85, 1085–1090 (2011)
H. Park, M.H. Shin, S.M. Iftiquar, S.Q. Hussain, M. Ju, Y.K. Kim, E.-C. Cho, J. Yi, The light-trapping effect in various textured cover glass for enhancing the current density in silicon heterojunction solar cells. Opt. Commun. 467, 125657 (2020)
J.-T. Lin, C.-C. Lai, C.-T. Lee, Y.-Y. Hu, K.-Y. Ho, S.W. Haga, A high-efficiency HIT solar cell with pillar texturing. IEEE J. Photovolt. 8(3), 669–675 (2018)
K. Nakamura, M. Aoki, I. Sumita, H. Sato, Y. Kumagai, Y. Kawata, Y. Ohshita, Texturization control for fabrication of high efficiency mono crystalline Si solar cell, in Proceedings of 39th IEEE Photovoltaic Special Conference (2013) pp. 1184–1192
S.C. Baker-Finch, K.R. Mclntosh, Reflection distributions of textured monocrystalline silicon: implications for silicon solar cells. Prog. Photovolt. Res. Appl. 21, 960–971 (2013)
J.D. Hylton, A.R. Burgers, W.C. Sinke, Alkaline etching for reflectance reduction in multicrystalline silicon solar cells. J. Electrochem. Soc. 151(6), G408–G427 (2004)
Acknowledgements
This research was supported by Korea Initiative for fostering University of Research and Innovation Program of the National Research Foundation (NRF) funded by the Korean government (MSIT) (Nos. NRF2021M3H1A104892211, 2021R1A2C2012649).
Author information
Authors and Affiliations
Contributions
HGP: Conceptualization, Validation, Investigation, MS: Methodology, YK: Software, J-HL: Supervision, MJ: Methodology, Data Curation, and JY: Supervision.
Corresponding authors
Ethics declarations
Conflict of interest
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Additional information
Publisher’s Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
About this article
Cite this article
Park, H.G., Shin, M., Kim, YK. et al. Surface Modification and Theoretical Investigation by Simulation for Light Trapping in Silicon Heterojunction Solar Cells. Trans. Electr. Electron. Mater. 24, 579–588 (2023). https://doi.org/10.1007/s42341-023-00479-z
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s42341-023-00479-z