Investigation of monocrystalline silicon surface texturization by image processing program

Main Article Content

Abdellah Trad khodja
Abdelkader Elamrani
Faouzi Kezzoula
Chahinez Nasraoui
Seif-Eddine Friha

Abstract

One of the main issues in the photovoltaic industry of silicon solar cells is the optical losses via reflection. To overcome this issue, texturization (chemical etching) remains the most commonly used method to produce a random pyramid structure to reduce reflection and thus increase photocurrent generation. Because of the anisotropic etching property of alkaline solution, square-based upright pyramids are formed, i.e., the difference in etching rates between (100) and (111) planes. In this paper, the following etching solutions were studied: 4/10, 6/6, and 10/4 (KOH weight percentage/IPA volume percentage).The optical, morphological, and electric characterizations using UV-Vis spectroscopy, electron scanning microscopy (SEM), and quasi-steady-state photoconductance (QSSPC) device are performed. Also, the standard weighted reflectance (SWR) was calculated. The pyramid size distribution generated using KOH-IPA solutions was investigated using an image processing program (ImageJ) via SEM images. The calculation of the height of the pyramids reveals that the typical pyramid size ranges from 3 to 9 mceclip0.pngm, with large pyramids of small proportions. Furthermore, when the pyramids are distributed in a mixture of tiny and medium pyramids in precise proportions, the reflectivity is at its lowest, and as the number of large pyramids rises, the reflectivity increases.

Article Details

How to Cite
[1]
A. . Trad khodja, A. . Elamrani, F. . Kezzoula, C. . Nasraoui, and S.-E. . Friha, “Investigation of monocrystalline silicon surface texturization by image processing program”, J. Ren. Energies, vol. 1, no. 1, pp. 229 -, Jun. 2022.
Section
special

References

Sui, Muchen, et al. A review of technologies for high efficiency silicon solar cells. Journal of Physics: Conference Series 2021; 1907:012026-1. Doi:10.1088/1742-6596/1907/1/012026.

Palik, E. D., et al. Etching Roughness for (100), Silicon Surfaces in Aqueous KOH. Journal of Applied Physics 1991; 70:3291-6. doi.org/10.1063/1.349263.

Lee, Jaehyeong, et al. Optimisation of fabrication process of high-efficiency and low-cost crystalline silicon solar cell for industrial applicationss. Solar Energy Materials and Solar Cells 2009, 93.256-2. doi.org/10.1016/j.solmat.2008.10.013.

F. Restrepo and C. E. Backus. On black solar cells or the tetrahedral texturing of a silicon surface. IEEE Trans. Electron Devices 1976; 23:1195-10. doi

Verlinden, Pierre, et al. The Surface Texturization of Solar Cells: A New Method Using V-Grooves with Controllable Sidewall Angles. Solar Energy Materials and Solar Cells 1992; 26:71-1-2. doi.org/10.1016/0927-0248(92)90126-A.

S.R. Chitre, A high volume cost efficient production microstructuring process, in: Proceedings of the 13th IEEE International Photovoltaic Specialist Conference, Washington DC, 1978, pp. 152-154.

N. Marrero, B. González-Díaz, R. Guerrero-Lemus, D. Borchert, and C. Hernández-Rodríguez. Optimization of sodium carbonate texturization on large-area crystalline silicon solar cells. Solar Energy Materials and Solar Cells 2007;91:1943- 20.doi.org/10.1016/j.solmat.2007.08.001.

A. Montesdeoca-Santana et al. XPS characterization of different thermal treatments in the ITO-Si interface of a carbonate-textured monocrystalline silicon solar cell. Nucl. Instrum. Meth 2010; 268:374-3-4. doi.org/10.1016/j.nimb.2009.09.044

E. Vazsonyi, K. De Clercq, R. Einhaus et al.Improved anisotropic etching process for industrial texturing of silicon solar cells. Solar Energy Materials and Solar Cells 1999; 57:179-26. doi.org/10.1016/S0927-0248 (98)00180-9

Silva A R, Miyoshi J, Diniz J A, et al. The Surface Texturing of Monocrystalline

Silicon with NH4OH and Ion Implantation for Applications in Solar Cells Compatible with CMOS Technology. Energy Procedia 2014, 44: 132.doi.org/10.1016/j.egypro.2013.12.019.

Basu PK, Sarangi D, Boreland MB. SingleComponent Damage-Etch Process for Improved Texturization of Monocrystalline Silicon Wafer Solar Cells. IEEE J. Photovoltaics 2013; 3:1222–8.

Zubel, I., Barycka, I. Silicon anisotropic etching in alkaline solutions I. The geometric description of figures developed under etching Si (100) in various solutions. Sensors and Actuators A: Physical 1998; 70:250-3. doi.org/10.1016/S0924-4247 (98)00141-1

Singh, Prashant, et al. Low Reflecting Hierarchically Textured Silicon by Silver Assisted Chemical Etching for Potential Solar Cell Application. Materials Today: Proceedings 2018; 5:23258- 11. doi.org/10.1016/j.matpr.2018.11.058.