Synthesis and characterization of nanostructured La-doped BaSnO3 for dye-sensitized solar cell application

Nanostructured pure and lanthanum (La) doped (0.01%, 0.03% and 0.05%) perovskite BaSnO3 materials were synthesized by hydrothermal method and annealed at 1000 °C/2 h in air. Rietveld refinement of the XRD data indicated single-phase nature of the samples with cubic crystallographic structure. The mo...

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Bibliographic Details
Published in:Materials chemistry and physics 2020-08, Vol.250, p.123137, Article 123137
Main Authors: Purushothamreddy, Nandarapu, Kovendhan, M., Dileep, Reshma K., Veerappan, Ganapathy, Kumar, K. Saravana, Joseph, D. Paul
Format: Article
Language:English
Subjects:
Barium stannate
Circuits
Crystal structure
Crystallography
Disintegration
Dye-sensitized solar cell (DSSC)
Dye-sensitized solar cells
Energy conversion efficiency
La doped BaSnO3
Lanthanum
Maximum power
Morphology
Nanoparticles
Nanorods
Nanostructure
Nanostructured materials
Oxidation
Perovskite
Perovskites
Photovoltaic cells
Short circuit currents
Valence
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Summary:Nanostructured pure and lanthanum (La) doped (0.01%, 0.03% and 0.05%) perovskite BaSnO3 materials were synthesized by hydrothermal method and annealed at 1000 °C/2 h in air. Rietveld refinement of the XRD data indicated single-phase nature of the samples with cubic crystallographic structure. The morphology of pure and La-doped BaSnO3 (La–BSO) studied using scanning electron microscopy indicated the formation of distinct rod-like structures. Upon doping with La, the BSO nanorods disintegrated and tend towards a mixed nanorods-nanoparticle like morphology as confirmed from the TEM measurements. The XPS data confirmed La to be in 3+ oxidation state. The 0.03% La–BSO was found to have a higher value of band-gap. A maximum power conversion efficiency of 1.23% with a higher short circuit current density of 2.57 mA/cm2 was obtained for the DSSC fabricated using 0.03% La–BSO nanostructured material as a photoanode. [Display omitted] •Rietveld refinement of XRD data confirm single-phase La-doped BaSnO3.•Doping of La in BaSnO3 show changeover to mixed nanorod-nanoparticle morphology.•La-doped BaSnO3 nanostructured powder indicated change in band gap.•Power conversion efficiency of 1.23% was obtained for DSSC using a La-doped BaSnO3.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2020.123137