Transient Photocurrent Responses of Sr<sub>1-x</sub>Ce<sub>x</sub>TiO<sub>3</sub> Perovskites Under Visible Light Illumination for Photovoltaic Applications

Kumar S. V., Babu D. P., Ponkumar S., Uthrakumar R., Kaviyarasu K., Nivetha A., ...Daha Fazla

LUMINESCENCE, cilt.39, sa.11, 2024 (SCI-Expanded, Scopus) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 39 Sayı: 11
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1002/bio.4918
  • Dergi Adı: LUMINESCENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Kocaeli Üniversitesi Adresli: Hayır

Özet

The objective of this study was to synthesize strontium titanate (Sr1-xCexTiO3) doped with Ce3+ by solid state method. Its crystalline structure is Sr1-xCexTiO3, and its bandgap ranges from similar to 3.3 to similar to 2.7 eV. In the photoluminescence of samples excited at 288 nm, the maximum emission of blue light was observed at 380 and 390 nm. Photocatalytic results show that dye molecules have a high absorbance, whereas their surface area is large. According to a line sweep voltammetric plot (LSV), illumination increases the current density by 0.4 mu A cm(-2) compared with dark conditions. It was demonstrated that the material changed from n-type to p-type under doping. Chronoamperometry spectra were obtained for sample Sr1-xCexTiO3 (x = 0, 0.005, 0.01, 0.03, 0.05) when an electrical voltage of 0.8 V was applied versus NHE. The plots indicate an increase in the current density under "light ON" conditions and a decrease under "light OFF" conditions. As Ce3+ concentration increases, the photocurrent increases until about 3 mol%, after which it decreases abruptly.