Increase of Thermal Temperature in Sonochemical Deposition of Sno2 Thin Films

Santana Mota, João Pedro, Nunes, Vanja Fontenele, Lima, Francisco Marcone, Maia Junior, Paulo Herbert Franca, Silva, William Neves, Bezerra Freitas, Nichollas Rodrigues, Andrade, Carla Freitas, Olimpio, Francisco, Almeida, Ana Fabíola Leite, Freire, Francisco Nivaldo Aguiar, Bezerra Sombra, Antônio Sérgio

ISES Solar World Congress 2025 · Fortaleza, Brazil · 2025-11-03
Published by International Solar Energy Society (ISES)
DOI: 10.18086/swc.2025.03.35

Abstract

The sonochemical deposition of SnO2 is a method widely spread in the literature to make thin films due to its lower cost and higher efficiency. This work shows the evaluation variations in drying temperature in the described process for dye-sensitized solar cells (DSSCs) application. The thermal treatment at 450°C for 1 hour with 10°C/min. This study suggests that the increment of temperature for the drying process increases the cell performance, significantly affecting power conversion efficiency and impedance. The samples were characterized with X-ray diffraction, ultraviolet and visible analyses, scanning electron microscopy, Fourier transform infrared spectroscopy, and Cell Test. The results showed high transmittance in visible and infrared between 400 nm and 1200 nm, high reflectance in visible between 400 nm and 700 nm, and a direct Band Gap between 3.51 eV to 3.76 eV.

Keywords

Sonochemical deposition, Thin films, PV cells, DSSCs, SnO 2

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