Cetyltriammonium Bromide Assisted Synthesis of Lanthanum Containing Barium Stannate Nanoparticles for Application in Dye Sensitized Solar Cells

Abstract

In present work, correlation of structural and optical behavior of pristine and lanthanum containing barium stannate nanoparticles (synthesized via cetyltriammonium bromide (CTAB) assisted facile wet chemical route), and its effect on photovoltaic properties of dye-sensitized solar cell are reported. Thermo-gravimetric analysis of the dried compound presumably BaSn(OH) 6 , leads to the formation of BaSnO 3 nanoparticles through three endothermic decomposition processes, via liberation of one mole of water in each step, together with removal of remaining CTAB in initial cycle. The X-ray diffraction patterns reveal that substitution of Ba 2þ lattice sites by La 3þ (upto %6 at.%), the lattice retains its cubic Pm3m symmetry, however, unit cell contracts. The dye sensitized solar cells are fabricated using pristine and La-containing BaSnO 3 as photo anode; platinum coated FTO as counter electrode, N719 dye as sensitizer and I À /I 3 À as electrolyte. These show the highest power conversion efficiency (%9.2%) at the La content of 6 at.% which is about threefold increase in efficiency in comparison to pristine BaSnO 3 . The electron transport properties of these DSSC devices are investigated by electro chemical impedance spectroscopy.

Structural and Energy Storage Properties of Hydrothermally Synthesized Y2MnCoO6 Double Perovskite

“…We implemented Scherrer's equation to get the relative nanocrystallite size (d)where λ is the utilized X‐ray wavelength (1.54056 Å), β is full width at half maximum (FWHM), and θ indicates the Bragg angle (rad.). [ 35 ] The value of d was calculated to be 27 nm.…”

“…where λ is the utilized X-ray wavelength (1.54056 Å), β is full width at half maximum (FWHM), and θ indicates the Bragg angle (rad.). [35] The value of d was calculated to be 27 nm.…”

Structural, Dielectric, and Energy Storage Properties of Citric Acid and Ethylene Glycol Assisted Hydrothermally Synthesized Y2FeCoO6

“…The average crystallite size ( D ) estimated using Debye–Scherrer formula (Equation ()) and strain calculated using Equation (), found to be ≈37 nm and 0.114%, respectively. [ 19,20 ] …”

Nanostructured perovskite oxides for dye-sensitized solar cells

“…The substitution of Sr in BSO raises the conduction band edge by modulating its crystal structure and electronic band structures, resulting in a high V OC and enhanced DSSC performance [12,33,139]. Substitution of Ba by rare-earth elements like La 3+ , Er 3+ /Yb 3+ , etc, in this POs also increased its DSSC performance by tailoring the perovskite structure, band structure and optoelectronic properties [140,141]. In the BSO band structure, the valence band maximum and conduction band minimum (CBM) are mainly composed of the Sn-5s/5p and O-2p orbitals, respectively [32].…”