| Enhanced Performance of Dye-Sensitized Solar Cells by
Lanthanum Doped-TiO2 Photoelectrodes |
Sakthivel Thirupathi,a Jagannathan Karthikeyan,*,a Jeevagan Kesavamoorthy,b
Jose Antony
Thomas Savarimuthu,a Suriya Pazhanivel,a Ezhilselvi Varathanc and Vajjiravel Murugesand
Pages: 49-56
DOI:10.1080/0371750X.2025.2472906 |
| Abstract |
| Dye-sensitized solar cells (DSSCs) are a type of thin-film solar cell in which metal
oxide nanomaterials are used as photoanodes. With the aim to improving the efficiency
of DSSC, pure and La3+ doped-TiO2 nanoparticles were synthesized by sol-gel method
and the quality of synthesized materials was investigated through various
characterizations like structural, elemental, morphological and optical studies. The
XRD pattern revealed the presence of anatase-TiO2 phase. The FESEM results
evidenced the spherical nanoparticles with less agglomeration. The UV-Vis spectra
showed enhanced light absorption with the addition of La. With the addition of
La, the band gap energy of the TiO2 nanoparticles reduced from 3.06 to 2.72 eV. These
nanoparticles were integrated as photoanodes in DSSC and the photocurrent
density-voltage (J-V) measurements were carried out. The highest energy conversion
efficiency () of 4.75 for pure TiO2 device was achieved while 5.8% was obtained for
the 5% La-doped TiO2 device. This enhancement of confirmed that 5% La-doped
TiO2 is highly suitable for DSSC device fabrication. It was also observed that the high
efficiency (~5.8%) with the highest current density of 11.11 mA/cm2
- was retained
even under low-light conditions.
[Keywords: TiO2, La doped-TiO2, Sol-gel, FESEM, DSSC] |
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