Impact of Sn-Sr co-doping on structural, morphological and optical properties of TiO2 for solar energy conversion applications

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik Pub Date : 2025-04-01 DOI:10.1016/j.ijleo.2025.172332

N. Nikitha , Vishnu Narayanan V , T. Raguram , K.S. Rajni , Madan Kuppusamy

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引用次数: 0

Abstract

In this study, undoped and tin (Sn), strontium (Sr) single and co-doped titanium dioxide (TiO₂) nanoparticles were prepared by the sol-gel technique for potential dye-sensitized solar cell (DSSC) applications. Structural analysis using X-ray diffraction and Laser-Raman spectroscopy substantiated the presence of the anatase phase within a tetragonal crystal system in all prepared samples, with a transition to the rutile phase observed in Sn, Sr-co-doped TiO₂. FTIR spectra indicated peak shifts, demonstrating the interaction between the dopants and TiO₂ lattices. UV-DRS analysis revealed a shift in the optical absorption edge towards the visible region, while the calculated values of the band gap aligned with these findings. Photoluminescence emission intensity was lower in doped TiO₂ samples compared to undoped TiO₂, indicative of improved DSSC efficiency. When employed as active photoanodes in DSSC fabrication, equimolar Sn and Sr co-doped TiO₂ achieved an efficiency of 3.35 %, surpassing the efficiencies of undoped TiO₂ (0.56 %), Sn-doped TiO₂ (1.62 %), and Sr-doped TiO₂ (0.59 %). These findings suggest the potential of co-doping TiO₂ with Sn and Sr to enhance DSSC performance.

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来源期刊

Optik 物理-光学

CiteScore

6.90

自引率

12.90%

发文量

1471

审稿时长

46 days

期刊介绍： Optik publishes articles on all subjects related to light and electron optics and offers a survey on the state of research and technical development within the following fields: Optics: -Optics design, geometrical and beam optics, wave optics- Optical and micro-optical components, diffractive optics, devices and systems- Photoelectric and optoelectronic devices- Optical properties of materials, nonlinear optics, wave propagation and transmission in homogeneous and inhomogeneous materials- Information optics, image formation and processing, holographic techniques, microscopes and spectrometer techniques, and image analysis- Optical testing and measuring techniques- Optical communication and computing- Physiological optics- As well as other related topics.