Enhancement of Photon Absorption onBaxSr1-xTiO3Thin-Fi

Abstract

Enhancement of photon absorption on barium strontium titanate (Ba Sr 1− TiO 3 ) thin-film semiconductor for mole fraction = 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.

Modified Spin Coating Method for Coating and Fabricating Ferroelectric Thin Films as Sensors and Solar Cells

“…BST thin films as solar cells enhanced by photonic crystals are currently being developed [37]. This enhancement needs higher angular velocity (>6000 rpm) than previous works in BST (3000 rpm).…”

“…The second generation of modified spin coater is used for coating the thin films to fulfill the requirement. The optical characterization of BST (Ba x Sr 1-x TiO 3 ) using a photonic crystal resulted in the average absorption percentages for mole fraction x = 0.25, 0.35, 0.45, and 0.55 were 92.04, 83.55, 91.16, and 80.12%, respectively [37]. In addition, the BST thin film with the embedded photonic crystal exhibited a relatively significant enhancement on photon absorption, with increasing values of 3.96, 7.07, 3.04, and 13.33%, respectively.…”

Introductory Chapter: Ferroelectrics Material and Their Applications

“…Other dopants include gallium oxide, tantalum oxide, niobium oxide and manganese [9,14,19,[22][23][24]. Furthermore, we are currently trying to enhance the ferroelectric effects using photonic crystals [25].…”

“…When researchers are growing ferroelectric thin films, they have used various concentrations, starting from 0.25 to 2.5 mole [7,23,[25][26][27][28]. Researchers applied the chemical solutions of various substrates: the most often is p-type silicone [3,11].…”

Formation of solar cells based on Ba0.5Sr0.5TiO3 (BST) ferroelectric thick film

“…The largest efficiency of solar cells is owned by the largest band gap. It's because the solar cells with wide band gap, require more absorbed photons energy to excite electron from valence band to conduct band [35,36]. When solar cells become more optimal to absorb light energy, then more energy is converted from light into electric current [20,[23][24][25][26].…”