Abstract
Recent studies have shown that biomimicry of moth eye structure reduces reflections over a wide range of wavelengths and angles of incidence thereby enabling good absorption at the broadband frequencies. Moth eyes consist of certain bump like nanostructures that ensure that refractive index gradually increases (from 1 at the top to around 3.5 at the bottom) as light travels from air to the optical nerve of the insect. Silicon and Gallium Arsenide (GaAs) have been used as Moth Eye antireflection coatings (ARCs). In the case of Silicon, when the incident irradiation or temperature is high, the temperature of the solar cell increases substantially leading to rapid decrease in efficiency, whereas using GaAs retains efficiency over a wide temperature spectrum.
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