Band gap engineering and modifying surface of TiO2 nanostructures by Fe2O3 for enhanced-performance of dye sensitized solar cell

Kilic, Bayram; Gedik, NEBİ; Mucur, Selin; Hergul, Ahmet; GÜR, Emre

doi:10.1016/j.mssp.2014.12.020

Band gap engineering and modifying surface of TiO2 nanostructures by Fe2O3 for enhanced-performance of dye sensitized solar cell

Kilic B., Gedik N., Mucur S. P., Hergul A. S., GÜR E.

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING, cilt.31, ss.363-371, 2015 (SCI-Expanded, Scopus)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 31
Basım Tarihi: 2015
Doi Numarası: 10.1016/j.mssp.2014.12.020
Dergi Adı: MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sayfa Sayıları: ss.363-371
Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

Well-crystallized Fe2O3-modified TiO2 nanoparticles are prepared by a hydrothermal method and were successfully used as the photoanode of dye-sensitized solar cell (DSSC). Structural, optical and thermal characterizations were carried out by SEM, XRD, AFM, EDAX, DTG, TG and UV-vis spectroscopy. We show that the solar conversion efficiency, incident photocurrent efficiency (IPCE) and fill factor (FF) of Fe2O3-modified TiO2 are significantly increased, about 40%, compared those of to bare TiO2. DSSC shows power conversion efficiency of 7.27% based on Fe2O3-modified TiO2 while TiO2 anatase shows 5.10% solar conversion efficiency. The high improvement in cell performance is attributed to the enhanced light harvesting and high specific surface area for adsorbing more dye molecules in Fe2O3-modified TiO2 nanostructures. (C) 2014 Elsevier Ltd. All rights reserved.