Nanostructure properties and dye-sensitized-solar-cell open-circuit voltage of a Tio2 aerogel and pre-hydrothermally treated xerogels

Bambang Priyono, Akhmad Herman Yuwono, Badrul Munir, Muhammad Hasan Mustofa, Faizah

Research output: Contribution to journalArticlepeer-review


Dye-sensitized solar cells (DSSCs) are third-generation photovoltaic devices, which are considered to be a very promising renewable-energy source that offers an alternative to fossil fuels due to their low cost, ease of production, and eco-friendliness. One of the most important components in DSSCs is the TiO2 layer, which serves as an active inorganic semiconductor oxide for photoelectron activity. Herein, TiO2 nanoparticles were synthesized via a sol-gel process using titanium tetra-n-butoxide, ethanol, hydrochloric acid, and deionized water at molar ratios of 0.4:0.83:1:1.39 upon sol preparation, followed by hydrothermal processes at three different temperatures (i.e., 100°C, 120°C, and 150°C); ambient drying; and multi-step calcination. For comparison, TiO2 aerogel nanoparticles were also prepared via supercritical extraction followed by multi-step calcination. The samples were analyzed by X-ray diffraction, Brunauer-Emmett-Teller surface-area measurements, UV-Vis spectroscopy in the diffuse-reflectance-) mode, and scanning electron microscopy. The results showed that the pre-hydrothermally treated samples exhibited band-gap energies of 3.34, 3.29, and 3.32 eV after treatment at 100°C, 120°C, 150°C, respectively, whereas the aerogel sample had a band-gap energy of 3.33 eV. Open-circuit-voltage measurements revealed that the DSSCs fabricated by pre-hydrothermal treatment at 120°C generated a higher voltage (320 mV) than aerogel cells (21 mV).

Original languageEnglish
Pages (from-to)972-982
Number of pages11
JournalInternational Journal of Technology
Issue number5
Publication statusPublished - 1 Jan 2018


  • Aerogel
  • Multi-step calcination
  • Open circuit voltage
  • Pre-hydrothermal treatment
  • Supercritical extraction

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