Upright Pyramid Surface Textures for Light Trapping and MoOx Layer in Ultrathin Crystalline Silicon Solar Cells
Abstract
In this work, ray tracing is used to investigate the optical characteristics of various surface structures in ultrathin crystalline silicon (c-Si) for solar cells. Ultrathin c-Si with a thickness of 20 μm is used as the substrate. The light trapping includes front upright pyramids with a molybdenum oxides (MoOx) anti-reflection (AR) layer. Planar ultrathin c-Si (without a MoOx AR layer and upright pyramids) is used as a reference. The wafer ray tracer was developed by a photovoltaic (PV) lighthouse to model the MoOx AR layer to reduce the front surface reflectance and impacts of the AR layer on ultrathin Si solar cells. The optical properties are calculated on the AM1.5 global solar energy spectrum across the 200–1200 nm wavelength region. From the absorbance profile, the photogenerated current density (Jph) in the substrate is also calculated with various surface structures. The front upright pyramids with the MoOx layer result in the largest absorbance enhancement due to the enhanced light scattering by the pyramids and MoOx AR layer. The Jph of 37.41 mA/cm2 is improved when compared to the planar ultrathin c-Si reference. This study is significant as it illustrates the potential of ultrathin c-Si as a promising PV module technology in the future.
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References
Chee, K.W.A., Tang, Z., Lü, H., and Huang, F., 2018. Anti-reflective structures for photovoltaics: Numerical and experimental design. Energy Reports, 4, 266-273. DOI: https://doi.org/10.1016/j.egyr.2018.02.002
Garín, M., Pasanen, T.P., López, G., Vähänissi, V., Chen, K., Martín, I., and Savin, H., 2023. Black ultra-thin crystalline silicon wafers reach the 4n2 absorption limit-application to IBC solar cells. Small, 19, 2302250. DOI: https://doi.org/10.1002/smll.202302250
Hu, Q., Wang, J., Lu, Y., Tan, R., Li, J., and Song, W., 2022. Sputtering-deposited thin films on textiles for solar and heat managements: A mini-review. Physica Status Solidi (a), 219, 2100572. DOI: https://doi.org/10.1002/pssa.202100572
Huang, S., Xu, C., Wang, G., Du, J., Yu, J., Zhang, L., Meng, F., Zhao, D., Li, R., Huang, H., Liu, Z., and Liu, W., 2024. Smaller texture improves flexibility of crystalline silicon solar cells. Materials Letters, 357, 135768. DOI: https://doi.org/10.1016/j.matlet.2023.135768
Kanda, H., Uzum, A., Harano, N., Yoshinaga, S., Ishikawa, Y., Uraoka, Y., Fukui, H., Harada, T., and Ito, S., 2016. Al2 O3 /TiO2 double layer anti-reflection coating film for crystalline silicon solar cells formed by spray pyrolysis. Energy Science and Engineering, 4, 269-276. DOI: https://doi.org/10.1002/ese3.123
Li, Y., Ru, X., Yang, M., Zheng, Y., Yin, S., Hong, C., Peng, F., Qu, M., Xue, C., Lu, J., Fang, L., Su, C., Chen, D., Xu, J., Yan, C., Li, Z., Xu, X., and Shao, Z., 2024. Flexible silicon solar cells with high power-to-weight ratios. Nature, 626, 105-110. DOI: https://doi.org/10.1038/s41586-023-06948-y
Lu, C., Rusli, Prakoso, A.B., and Li, Z., (2018). Aqueous Solution Deposited Molybdenum oxide Crystalline Silicon Heterojunction Solar Cells. In: 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC), pp.2155-2157. DOI: https://doi.org/10.1109/PVSC.2018.8547341
Macco, B., Vos, M., Thissen, N.F.W., Bol, A.A., and Kessels, W.M.M., 2015. Low-temperature atomic layer deposition of MoOx for silicon heterojunction solar cells. Physica Status Solidi, 9, 393-396. DOI: https://doi.org/10.1002/pssr.201510117
Omar, H.D., Hashim, M.R., and Pakhuruddin, M.Z., 2020. Ray tracing of inverted pyramids for light-trapping in thin crystalline silicon for solar cells. Optik, 219, 165279. DOI: https://doi.org/10.1016/j.ijleo.2020.165279
Pakhuruddin, M.Z., 2020. Ray tracing of light trapping schemes in thin crystalline silicon for photovoltaics. Solid State Phenomena. Trans Tech Publications, Switzerland, pp.183-191. DOI: https://doi.org/10.4028/www.scientific.net/SSP.301.183
Pakhuruddin, M.Z., Huang, J., Dore, J., and Varlamov, S., 2016. Enhanced absorption in laser-crystallized silicon thin films on textured glass. IEEE Journal of Photovoltaics, 6, 852-859. DOI: https://doi.org/10.1109/JPHOTOV.2016.2545410
Shanmugam, N., Pugazhendhi, R., Madurai Elavarasan, R., Kasiviswanathan, P., and Das, N., 2020. Anti-reflective coating materials: A holistic review from PV perspective. Energies, 13, 2631. DOI: https://doi.org/10.3390/en13102631
Tahir, S., Saeed, R., Ashfaq, A., Ali, A., Mehmood, K., Almousa, N., Shokralla, E.A., Macadangdang, R.R. Jr., Soeriyadi, A.H., and Bonilla, R.S., 2024. Optical modeling and characterization of bifacial SiNx/AlOx dielectric layers for surface passivation and antireflection in PERC. Progress in Photovoltaics: Research and Applications, 32, 63-72. DOI: https://doi.org/10.1002/pip.3745
Valiei, M., Shaibani, P.M., Abdizadeh, H., Kolahdouz, M., Asl Soleimani, E., and Poursafar, J., 2022. Design and optimization of single, double and multilayer anti-reflection coatings on planar and textured surface of silicon solar cells. Materials Today Communications, 32, 104144. DOI: https://doi.org/10.1016/j.mtcomm.2022.104144
Xue, M., Nazif, K.N., Lyu, Z., Jiang, J., Lu, C.Y., Lee, N., Zang, K., Chen, Y., Zheng, T., Kamins, T.I., Brongersma, M.L., Saraswat, K.C., and Harris, J.S., 2020. Free-standing 2.7 μm thick ultrathin crystalline silicon solar cell with fficiency above 12.0%. Nano Energy, 70, 104466. DOI: https://doi.org/10.1016/j.nanoen.2020.104466
Zhou, Y., Wen, J., Zheng, Y., Yang, W., Zhang, Y., and Cheng, W., 2024. Status quo on recycling of waste crystalline silicon for photovoltaic modules and its implications for China’s photovoltaic industry. Frontiers in Energy. DOI: https://doi.org/10.1007/s11708-024-0923-y
Zin, N., Mcintosh, K., Bakhshi, S., Vázquez-Guardado, A., Kho, T., Fong, K., Stocks, M., Franklin, E., and Blakers, A., 2018. Polyimide for silicon solar cells with double-sided textured pyramids. Solar Energy Materials and Solar Cells, 183, 200-204. DOI: https://doi.org/10.1016/j.solmat.2018.03.015
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