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SETSCI - Volume (2018)
ISAS 2018 - Ist International Symposium on Innovative Approaches in Scientific Studies, Kemer-Antalya, Turkey, Apr 11, 2018

Fabrication Techniques for Light Trapping and Capturing Textures in Crystalline Silicon Solar Cells (ISAS 2018_36)
Serra Altınoluk1*, Raşit Turan2
1Department of Electrical and Electronics Engineering, Muğla Sıtkı Koçman University , Muğla, Turkey
2Department of Physics, Middle East Technical University , Ankara, Turkey
* Corresponding author: serraltinoluk@mu.edu.tr
Published Date: 2018-06-23   |   Page (s): 39-39   |    133     7

ABSTRACT In order to increase the performance/cost ratio of solar cells, new approaches reducing optical and electrical losses are necessary during the absorption of the light and collection of charge carriers. In this work we focused on various textures on Si surface towards a better light management of the cell surface. The efficiency of a solar cell strongly depends on the properties of the interaction between the incoming light beam and the surface of the device. In order to maximize the absorption and the efficiency of the cell, various light trapping schemes have been proposed. We have applied different lithography techniques such as optical lithography, nanoimprint lithography (NIL), hole mask colloidal lithography (HCL) to generate various periodic micro and nano surface textures. After predefined pattern transfer process steps, either dry plasma etching or wet chemical etching techniques were applied. Structural properties of the features like diameter, pitch size, depth were varied and optimized. With a variety of texturing and etching process types, at the end of the study, periodic and random-introduced-periodic patterns were successfully implemented to solar cell fabrication step. The performances of the solar cells were investigated both optically and electrically.  
KEYWORDS solar cells, surface texturing, light trapping, micro electro mechanical systems, crystalline silicon

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