22 May 2018 Plasmonic nanoscatter antireflective coating for efficient CZTS solar cells
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Abstract
Antireflective coatings have been used for reducing light reflection in many optoelectronic devices. Using these coating with thin _lm CZTS solar cell, would increase its low efficiency and make it a good alternative for bulk solar cells. Designing optimum antireflective coating requires to control light scattering directivity from subwavelength nanostructures. Mie theory could calculate absorption and scattering cross section of different nanoscatters on CZTS substrate, and it is enables us in understanding role of electric and magnetic dipoles in reducing light reflection from coated surface. Our approach is using concept of Mie theory to make design methodology for fast predicting optimum plasmonic nanoscatters dimension for lowest light reflection. Then, we swept on periodicity for examining light coupling dependency on pitch. Moreover, we made coating for plasmonic nanoscatters with dielectric materials to study possible enhancements from plasmonic and dielectric on same scatter. Our results indicate possibility of controlling absorption and scattering cross section of plasmonic nanoscatters with changing its dimensions and pitch. Also, using dielectric coating could enhance the light coupling performance over planar CZTS substrate. We suggested some nanoscatters with certain dimensions to achieve highest enhancement in light absorption inside CZTS solar cells. All calculations of this work built based on Mie theory. For verification of our results, we start by modelling of silver sphere on substrate and it gave a very good matching with previously reported work. Integrating antireflective coating with CZTS solar cells would open the door for increasing its overall efficiency beyond current limit.
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Omar A. M. Abdelraouf, Omar A. M. Abdelraouf, Ahmed Shaker, Ahmed Shaker, Nageh K. Allam, Nageh K. Allam, } "Plasmonic nanoscatter antireflective coating for efficient CZTS solar cells", Proc. SPIE 10688, Photonics for Solar Energy Systems VII, 1068815 (22 May 2018); doi: 10.1117/12.2307117; https://doi.org/10.1117/12.2307117
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