Performance of nanowire decorated mono- and multi-crystalline Si solar cells

Es, Fırat
Demircioğlu, Olgu
Günöven, Mete
Kulakcı, Mustafa
Ünalan, Hüsnü Emrah
Turan, Raşit
Light trapping ability of a solar cell can be improved by the application of various texturing schemes to the surface of the solar cells. For monocrystalline (mono-c) silicon solar cells, this is practically accomplished through pyramid texturing in a hot alkaline solution. For multicrystalline (multi-c) silicon solar cells, texturing is done by continuous oxidation and random etching of silicon from the surface. In this study, we have used metal assisted etching (MAE) technique to form silicon nanowires on the surface of pyramid textured mono-c, flat mono-c and multi-c silicon solar cells with an area of 156 mm x 156 mm using standard solar cell processing protocols. It was shown that nanowire texturing causes a dramatic decrease in the reflectivity of the cell surface. Current-voltage (I-V) characteristics revealed that the solar cells with nanowires on top of pyramid texturing exhibit the best performance among all investigated cell types. This may be attributed to combined effect of nanowires and pyramids on the surface.


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An effective way of increasing the efficiency of solar cells is to spectrally split sunlight into several frequencies and absorb each frequency using appropriate photovoltaic materials. In this study, we establish a method to show spectral splitting of broadband solar light via iteratively optimized diffractive optical elements. We develop an algorithm in order to calculate 2D holographic patterns that focus two different frequencies to designated positions.
Simulation Studies of Hole Textured and Planar Microcrystalline Silicon Solar Cell at Different Zenith Angle
Zainab, Sana; Hussain, Shahzad; Altinoluk, Serra H.; Turan, Raşit (2017-09-23)
Efficiency of solar cell greatly depends on its interaction with input solar irradiance. For highly efficient solar cell, absorption of input light should be maximum at all angles. Different surface texturing techniques like pyramid texturing, cone texturing, pillar texturing have been used to increase absorption of light in solar cell. Micro-hole Surface texturing is getting popular in absorption of solar radiation at higher zenith angle. In this paper, effect of varying zenith angle on hole textured solar...
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Rufangura, Patrick; Sabah, Cumali (2016-12-01)
This paper suggests a metamaterial (MTM) absorber structure to be used for efficiency improved solar cell. The proposed MTM absorber consists of the topmost three concentric circular ring resonators, and a ground metal plane sandwiched to the top layer with a dielectric spacer. Numerical simulation and theoretical (interference theory) studies on the proposed design show a wideband with near-perfect (>99%) absorption response in the visible frequency region of the solar spectrum. Thermal characterization of...
Improvement of multiband absorption with different technics (graphene, ito, and hole) for metamaterial absorber at optical frequencies
Mulla, Batuhan; Sabah, Cumali (2018-10-01)
Three absorption improvement techniques are numerically applied to a multiband metamaterial absorber design for solar energy harvesting. These techniques are the following: the reshaping of the back metallic plate, the integrating of graphene sheets, and the utilizing of indium tin oxide (ITO), in the design. Based on numerical simulation results, each of these methods has the capacity to enhance total absorption rates. In addition to the enhancement in the total absorption rates, new absorption peaks are a...
Application of Si Nanowires Fabricated by Metal-Assisted Etching to Crystalline Si Solar Cells
KULAKCI, Mustafa; ES, FIRAT; ÖZDEMİR, Baris; Ünalan, Hüsnü Emrah; Turan, Raşit (2013-01-01)
Reflection and transmission through a solar cell can be significantly reduced using light-trapping structures. This approach can be applied to both crystalline and thin-film solar cells to improve the light absorption and conversion efficiency of the cell. In this study, vertically aligned Si nanowires were fabricated over a large area via a metal-assisted etching technique. Following a detailed parametric study, nanowires were applied to industrial-size (156 mm x 156 mm) Si solar cells. The reflectivity fr...
Citation Formats
F. Es, O. Demircioğlu, M. Günöven, M. Kulakcı, H. E. Ünalan, and R. Turan, “Performance of nanowire decorated mono- and multi-crystalline Si solar cells,” PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, pp. 71–74, 2013, Accessed: 00, 2020. [Online]. Available: