Produce of graphene/iron pyrite (FeS2) thin films counter electrode for dye-sensitized solar cell

KILIÇ B., TÜRKDOĞAN S., Ozer O. C., Asgin M., Bayrakli O., SÜRÜCÜ G., ...Daha Fazla

Materials Letters, cilt.185, ss.584-587, 2016 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 185
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1016/j.matlet.2016.06.069
  • Dergi Adı: Materials Letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.584-587
  • Anahtar Kelimeler: Graphene, Tio(2), DSSC, Pyrite (FeS2), Counter electrode
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

© 2016Dye-sensitized solar cells (DSSCs) provide a low cost alternative to the conventional solar cells due to their easy and inexpensive device fabrication steps. Generally, F:SnO2 (FTO) conductive glass with a thin layer coating of platinum (Pt) is used as a counter electrode (CE) in DSSCs. Since Pt is rare and therefore expensive metal, we were looking for a way to produce a new counter electrode based on graphene/iron pyrite (FeS2) thin films as an alternative to the Pt:FTO. In combination with a TiO2 mesoporous photoanode and an I3−/I- redox electrolyte, graphene/FeS2 CE based DSSC shows η=7.43% energy conversion efficiency under 1 sun illumination (100 mW/cm2, AM 1.5G) which is approximately 16.1% higher than conventional Pt CE (η=6.40%). External Quantum Efficiency (EQE) is found to be shifted upward when graphene/FeS2 is used as CE in the place of Pt CE. The excellent performance of the graphene/FeS2 CE makes it a very promising alternative to costly Pt in DSSCs.