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Enhancement of Photon Absorption on\({\text{Ba}}_{x}{\text{Sr}}_{1-x}{\text{TiO}}_{3}\)Thin-Film Semiconductor Using Photonic Crystal

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      Abstract

      Enhancement of photon absorption on barium strontium titanate ( Ba x Sr 1 - x TiO 3 ) thin-film semiconductor for mole fraction x = 0.25 , 0.35, 0.45, and 0.55 using one-dimensional photonic crystal with defect was investigated experimentally. The thin film was grown on transparent conductive oxide (TCO) substrate using chemical solution deposition method and annealed at 500°C for 15 hours with increasing rate of 1.6°C/min. From optical characterization in visible spectrum it was found that the average absorption percentages are 92.04%, 83.55%, 91.16%, and 80.12%, respectively. The BST thin film with embedded photonic crystal exhibited a relatively significant enhancement on photon absorption, with increasing value of 3.96%, 7.07%, 3.04%, and 13.33% for the respective mole fraction and demonstrating absorbance characteristic with flat feature. In addition, we also discuss the thin-film properties of attenuation constant and electrical conductivity.

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      Most cited references 19

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      Improving thin-film crystalline silicon solar cell efficiencies with photonic crystals.

      Most photovoltaic (solar) cells are made from crystalline silicon (c-Si), which has an indirect band gap. This gives rise to weak absorption of one-third of usable solar photons. Therefore, improved light trapping schemes are needed, particularly for c-Si thin film solar cells. Here, a photonic crystal-based light-trapping approach is analyzed and compared to previous approaches. For a solar cell made of a 2 mum thin film of c-Si and a 6 bilayer distributed Bragg reflector (DBR) in the back, power generation can be enhanced by a relative amount of 24.0% by adding a 1D grating, 26.3% by replacing the DBR with a six-period triangular photonic crystal made of air holes in silicon, 31.3% by a DBR plus 2D grating, and 26.5% by replacing it with an eight-period inverse opal photonic crystal.
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        Crystalline Si thin-film solar cells: a review

         R.B. Bergmann (1999)
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          Thin-film solar cells

           Armin Aberle (2009)
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            Author and article information

            Journal
            International Journal of Optics
            International Journal of Optics
            Hindawi Limited
            1687-9384
            1687-9392
            2014
            2014
            : 2014
            :
            : 1-8
            10.1155/2014/534145
            © 2014

            http://creativecommons.org/licenses/by/3.0/

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