The main intention of this experimental work is to eliminate the reflection of the CZTS/CdS thin film solar cell by depositing the ZnS Antireflection coating (ARC) by Nebulizer Spray Pyrolysis Technique. The CZTS/CdS thin films with and without ZnS Antireflection coating (ARC) deposited using nebulizer spray pyrolysis method is reported in this work. The prepared films were characterized by X-ray diffraction, scanning electron microscopy and UV-Vis spectroscopy analysis. Structural parameters such as lattice constants, texture orientation factor, micro strain, dislocation density and crystallite size were estimated using XRD data. The efficiency of CZTS/CdS solar cell is calculated using I-V characteristics. The experimental results exhibit the short circuit current increased from 9.269×10 −5 A to 1.250×10 −4 A and efficiency raised from 0.21% to o.45%. with ZnS as a ARC. The theoretical quantum efficiency of CZTS solar cell with ZnS ARC is increased from 0.020% to 0.030%. The results indicates that the ZnS ARC is one of the perfect ARC in the CZTS solar cell.
Carrier generation is one of the important processes in solar cell operations. The generation rate depends on the number of photons absorbed by solar cell. This absorption of photons is affected by the reflection losses. The light trapping technique is used to minimize the reflection loss. In this work, a theoretical design of Effective Interface Antireflective Coating (EI-ARC) in solar cell is proposed which is based on the theory of Fabry–Perot interference filters. This design is composed of a space index layer with two subsystems of multilayer, which allows multiple reflections within it. It is shown that the combination of this two systems yields high transmission values over a narrow spectral range. This EI-ARC model increases the Internal Quantum Efficiency (IQE) and carrier generation rate of solar cell. These parameters are significant to raise the efficiency of the solar cell.
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