Synergistic effect of Ga(NO3)(3) & TiCl4 post-treatment on photovoltaic performance of dye-sensitized solar cells

BİLEN K., YILDIZ Y.

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, cilt.129, sa.4, 2023 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 129 Sayı: 4
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1007/s00339-023-06600-6
  • Dergi Adı: APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex
  • Anahtar Kelimeler: Dye-sensitized solar cells, Post-treatment, Ga(NO3)(3), Shift of band edge, RECOMBINATION, PHOTOANODES, EFFICIENCY, FILM, CO
  • Ankara Üniversitesi Adresli: Evet

Özet

TiCl4 post-treatment promises to suppress recombination occurring at TiO2/dye/electrolyte interfaces for high-performance cost-effective dye-sensitized solar cells (DSSCs). So far, however, TiCl4 post-treated working electrodes currently exhibit insufficient open-circuit voltage (V-OC) associated with downward shift of conduction band edge (E-CB), which essentially hinders the performance of the cells. Here, we offer Ga(NO3)(3) as an alternative post-treatment material to overcome this issue. The Ga(NO3)(3) solution is diluted in aqueous solution with a concentration of 100 mM. To compensate the V-OC loss originated from TiCI4 post-treatment, Ga(NO3)(3) post-treatment causing upward shift of E-CB unveils a promising potential. A larger recombination resistance at TiO2/dye/electrolyte interfaces is obtained with application of Ga(NO3)(3), guiding that the Ga(NO3)(3) post-treatment suppresses electron recombination as well. Thus, the device including TiCl4 & Ga(NO3)(3) post-treated electrode outperforms that of TiCI4 post-treated electrode. Compared to bare electrode, the TiCl4 & Ga(NO3)(3) post-treated electrode displays an enhanced power conversion efficiency (6.41%) of around 47%. The results suggest a promising path for an efficient DSSC.