Abstract
Distributed Bragg reflectors (DBRs) or one-dimensional photonic crystals (1DPCs) play key role in advanced opto-electronic and photonic devices. The term photonics is derived from photons in which particle indicates a quantum of light and photon carries energy proportional to the radiation frequency with zero rest mass. In this work, we present the designing 1DPCs by using Si/SiO2 layers using a plane wave expansion method (PWE). For that, various parameters are optimized such as thicknesses (d) of each layer, center wavelength (λc), refractive index (nH/nL) of individual layer and the number of DBR/period to analyze the photonic band gap (PBG). The transverse electric (TE) and magnetic (TM) field distribution at different wavelength is discussed and helpful to understand the light harvesting mechanism within the PBG. Finally, this optimized DBR layers were integrated into a thin film amorphous silicon solar cell as a back-end reflector. Due to the tuned PBG, the proposed and designed amorphous silicon thin film solar cell has yielded an improved of light absorption, which is useful for enhancing the photovoltaic performance.
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