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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

International Journal of Optics

Hindawi Limited

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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.

### Most cited references19

• Record: found
• Abstract: found

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

(2007)
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

(1999)
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### Thin-film solar cells

(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