23 August 2016 Silicon nanospheres for directional scattering in thin-film solar cells
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Abstract
Reducing active layer thickness of solar cell stresses on efficient light trapping mechanisms to keep the cell efficiency intact. Directional light scattering and promising refractive index of silicon nanoparticles make them encouraging scattering centers for thin-film silicon solar cells. Finite-difference time-domain simulations are used to study the optical properties of silicon nanospheres embedded in the top and bottom buffer layer of solar cells. Diameter of a silicon nanoparticle plays a crucial role in the forward and backward scattering of incident light into the cell. Silicon nanospheres outperform commonly used metallic and dielectric nanospheres and trapped the incident light over a broad spectrum. Silicon nanospheres require special attention when placed in both the buffer layers of the solar cell simultaneously, and lateral displacement of the silicon nanospheres at the top buffer layer with respect to nanospheres at the bottom buffer layer is beneficial. Lateral displacement of nanospheres provides a total quantum efficiency of 51.49% in comparison to 21.9% of the pristine cell. These exceptional scattering competencies of silicon nanospheres make them a promising candidate for photovoltaic applications. Silicon scatterers may be used with well-established fabrication techniques.
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
Poonam Shokeen, Amit Jain, Avinashi Kapoor, "Silicon nanospheres for directional scattering in thin-film solar cells," Journal of Nanophotonics 10(3), 036013 (23 August 2016). https://doi.org/10.1117/1.JNP.10.036013 . Submission:
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