In the current work, we studied the influence of surface modification on reflectivity and minority carrier lifetime of mc-Si wafer taken from ingot grown by DS process. Two etchants combination namely, KOH/IPA/DI water, and NaOCl/KOH/IPA/DI water are used for different time durations. Reflectance and minority carrier lifetime vary significantly for both etchants used in this work. Optimised micro pyramidal structure formation will aid in enhancing the total internal reflection thereby increasing light absorption. Increase in minority carrier lifetime will be helpful in increasing the efficiency of solar cell. In order to establish the effect of etching on reflectivity of wafers, Al-doped ZnO was sputtered on etched surface and reflectivity was found to decrease further as observed from the reflectivity spectrum. I-V measurements were carried out on Ag/Ti/AZO/mc-Si/Ag and effect of etching on contact behaviour was observed. AZO-coated Si surface with optimised surface micro pyramids served as a good antireflection layer.
BallifC, HaugF-J, BoccardM, . Status and perspectives of crystalline silicon photovoltaics in research and industry. Nat Rev Mater. 2022;7(8):597–616. doi:10.1038/s41578-022-00423-2
2.
UeckerR.The historical development of the Czochralski method. J Cryst Growth. 2014;401:7–24. doi:10.1016/j.jcrysgro.2013.11.095
3.
The Czochralski method – where we are 90 years after Jan Czochralski's invention – Müller – 2007 – Crystal Research and Technology – Wiley Online Library. https://onlinelibrary.wiley.com/doi/abs/10.1002crat.200711001 (accessed 2022 October 17).
4.
Development of high-performance multicrystalline silicon for photovoltaic industry – Yang – 2015 – Progress in Photovoltaics: Research and Applications - Wiley Online Library. https://onlinelibrary.wiley.com/doi/abs/10.1002pip.2437 (accessed 2022-10-17).
5.
LiZ, LiuL, LiuX, . Heat transfer in an industrial directional solidification furnace with multi-heaters for silicon ingots. J Cryst Growth. 2014;385:9–15. doi:10.1016/j.jcrysgro.2013.01.053
GreenM, DunlopE, Hohl-EbingerJ, . Solar cell efficiency tables (Version 57). Prog Photovolt Res Appl. 2021;29(1):3–15. doi:10.1002/pip.3371
8.
SopianK, CheowSL, ZaidiSH.An overview of crystalline silicon solar cell technology: past, present, and future. AIP Conf Proc. 2017;1877(1):020004. doi:10.1063/1.4999854
9.
KumarA, MelkoteSN.Diamond wire sawing of solar silicon wafers: a sustainable manufacturing alternative to loose abrasive slurry sawing. Proc Manuf. 2018;21:549–566. doi:10.1016/j.promfg.2018.02.156
SchwartzGC, SchaiblePM.Reactive ion etching of silicon. J Vac Sci Technol. 1979;16(2):410–413. doi:10.1116/1.569962
12.
LeeY, KimH, HussainSQ, . Study of metal assisted anisotropic chemical etching of silicon for high aspect ratio in crystalline silicon solar cells. Mater Sci Semicond Process. 2015;40:391–396. doi:10.1016/j.mssp.2015.07.011
13.
PanekP, LipińskiM, DutkiewiczJ.Texturization of multicrystalline silicon by wet chemical etching for silicon solar cells. J Mater Sci. 2005;40(6):1459–1463. doi:10.1007/s10853-005-0583-1
14.
LounasA, Nait BoudaA, MenariH, . Texture etching of monocrystalline silicon surface with sodium hypochlorite. Surf Eng. 2014;30(2):148–151. doi:10.1179/1743294413Y.0000000221
15.
KimK, DhungelSK, JungS, . Texturing of large area multi-crystalline silicon wafers through different chemical approaches for solar cell fabrication. Sol Energy Mater Sol Cells. 2008;92(8):960–968. doi:10.1016/j.solmat.2008.02.036
16.
ZouS, YeX, WuC, . Complementary etching behavior of alkali, metal-catalyzed chemical, and post-etching of multicrystalline silicon wafers. Prog Photovoltaics Res Appl. 2019;27(6):511–519. doi:10.1002/pip.3125
17.
QiaoF, LiangQ, JiangY, . Fabrication of multi-crystalline silicon pyramid structure and improvement in Its photovoltaic performance. J Mater Sci. 2020;55(2):680–687. doi:10.1007/s10853-019-04072-9
18.
Al-HusseiniAM, LahlouhB.Influence of pyramid size on reflectivity of silicon surfaces textured using an alkaline etchant. Bull Mater Sci. 2019;42(4):152. doi:10.1007/s12034-019-1848-7
19.
HwangJ-D, HsiehD-R.A surface-plasmon-enhanced silicon solar cell with KOH-etched pyramid structure. IEEE Electron Device Lett. 2013;34(5):659–661. doi:10.1109/LED.2013.2253594
20.
KangI-B, HaskardMR, SamaanND.A study of two-step silicon anisotropic etching for a polygon-shaped microstructure using KOH solution. Sens Actuators A. 1997;62(1):646–651. doi:10.1016/S0924-4247(97)01500-8
21.
MuñozD, CarrerasP, EscarréJ, . Optimization of KOH etching process to obtain textured substrates suitable for heterojunction solar cells fabricated by HWCVD. Thin Solid Films. 2009;517(12):3578–3580. doi:10.1016/j.tsf.2009.01.024
22.
LuY, ZhangX, HuangJ, . Investigation on antireflection coatings for Al:ZnO in silicon thin-film solar cells. Optik – Int J Light Electron Optics. 2013;124(18):3392–3395. doi:10.1016/j.ijleo.2012.10.012
23.
VermaA, KhanF, KumarD, . Sol–gel derived aluminum doped zinc oxide for application as anti-reflection coating in terrestrial silicon solar cells. Thin Solid Films. 2010;518(10):2649–2653. doi:10.1016/j.tsf.2009.08.010
MatkivskyiV, Karstein RøysetA, StokkanG, . Novel technique to study the wet chemical etching response of multi-crystalline silicon wafers. Mater Sci Eng: B. 2023;290:116343. doi:10.1016/j.mseb.2023.116343
26.
VázsonyiÉ, DücsőC, PekkerÁ. Characterization of the anisotropic etching of silicon in two-component alkaline solution. J Micromech Microeng2007;17(9):1916. doi:10.1088/0960-1317/17/9/021
27.
CampbellSA, CooperK, DixonL, . Inhibition of pyramid formation in the etching of Si p(100) in aqueous potassium hydroxide-isopropanol. J Micromech Microeng. 1995;5(3):209–218. doi:10.1088/0960-1317/5/3/002
28.
SolankiCS.Solar photovoltaics: fundamentals, technologies and applications. PHI Learning Pvt. Ltd., New Delhi; 2015.
