Band gap engineering and modifying surface of TiO2 nanostructures by Fe2O3 for enhanced-performance of dye sensitized solar cell. (March 2015)

• Record Type: Journal Article
• Authors: Kılıç, Bayram; Gedik, Nebi; Mucur, Selin Pıravadıllı; Hergul, Ahmet Serhan; Gür, Emre
• Is Part Of: Materials science in semiconductor processing. Volume 31(2015:Mar.)
• Page Start: 363
• Page End: 371
• Publication Date: 2015-03
• Subjects: Dye sensitized solar cell -- Fe2O3-modified TiO2 -- Nanostructures -- Hydrothermal method; Semiconductors -- Periodicals; Integrated circuits -- Materials -- Periodicals; Semiconducteurs -- Périodiques; Circuits intégrés -- Matériaux -- Périodiques; Electronic journals; 621.38152
• DOI: 10.1016/j.mssp.2014.12.020
• Languages: English
• ISSNs: 1369-8001

Abstract

Abstract: Well-crystallized Fe2 O3 -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 Fe2 O3 -modified TiO2 are significantly increased, about 40%, compared those of to bare TiO2 . DSSC shows power conversion efficiency of 7.27% based on Fe2 O3 -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 Fe2 O3 -modified TiO2 nanostructures.