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2Fabrication of Innovative Grating structures using laser technology for Solar cell applications.
Sucheta Juneja1;3, V.S. Pavelyev2, Sushil Kumar3
1-Jindal SAW Limited, Nanakapaya1, Gujarat 370415 India.
2- Samara National Research University2, Samara, Russia 443086
3- CSIR-National Physical Laboratory3, New Delhi 110012 India.
Main author email address: [email protected]
The Fabrication of innovative grating structures using laser technology for solar cell applications is an exciting area of research and development. Gratings structures are necessary for optimal light absorption as these periodic structures manipulate light in different ways and result in enhancing the efficiency of devices. Absorption in thin-film solar cells can be improved by revising the geometry of the solar cell structure. Laser technology enables precise and flexible fabrication, making it an ideal tool for creating complicated and tailored grating structures. The absorption enhancement in the silicon thin-film absorber layer is investigated via an optical grating structure. Fabrication of effective light-trapping through engineering metallic grating structures realized to enlarge the optical path length of light within the absorber layer. Grating fabrication technology was employed by using a laser beam to write patterns on bare metallic chromium films. Circular patterns were written using a polar coordinate laser writer. These particular efforts showed increased absorption of light in the ultraviolet (UV) and near-infrared (NIR) part of the solar spectrum and that is effective in achieving performance close to 98% absorption at shorter wavelengths, i.e., from 400 to 500 nm with a 2-^m grating period. Thus, these fabricated grating structures can be used as efficient backside reflectors in thin-film solar cells. Therefore, the fabrication of these grating structures using laser technology has the potential to revolutionize solar cell applications, improving their efficiency and making solar energy more viable as a sustainable and clean energy source. However, It requires further research and development to make it commercially viable on a large scale.
[1] S. Juneja, V. S. Pavelyev, S. N. Khonina, & S. Kumar, Fabrication of innovative diffraction gratings for light absorption enhancement in silicon thin films for solar cell application. Journal of Optics,1-17, (2023).
[2] M.A. Shahamat, H. Heidarzadeh & H. Bahador, Performance improvement of an ultra-thin amorphous silicon solar cell using
multilayers chirped diffraction back gratings, Physica Scripta 97, no. 3: 030004 (2022).
