Anzeige
Erschienen in:
10.05.2018
Effect of MnO2 doping on the structure and optical proprieties of rutile TiO2-based photoanodes
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 13/2018
EinloggenAktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
Abstract
Doped TiO2-based photoanodes of dye-sensitized solar cells have been synthesized by solid state reaction technique. The influence of MnO2 dopant on the crystal structure and optical properties of photoanodes was investigated by means of XRD, FTIR, and UV–Visible spectroscopy techniques. X-ray diffraction revealed a decrease in lattice parameters of tetragonal rutile TiO2 with increasing of the dopant content accompanied by a valley-like behavior of its lattice distortion. Infrared spectroscopy study showed a growth of the absorption band at 262 cm−1 and shift towards lower energies for the two absorption peaks at 428.7 and 358 cm−1 with increasing of dopant content. These results were explained and found to support XRD analysis of the prepared TiO2–(MnO2)x samples. The optical energy gap showed a linear decrease from 3.06 eV for undoped sample to 2.75 eV for MnO2 content with 0.3 mass fraction. The behavior of extinction coefficient (k), refractive index (n) and optical conductivity (σ
opt
) with variation of MnO2 content was investigated.