Dye-sensitized solar cells based on porous hollow tin oxide nanofibers

Sudhan Sigdel, Hytham Elbohy, Jiawei Gong, Nirmal Adhikari, Krishnan Sumathy, Hui Qiao, Qufu Wei, Muhammad Hassan Sayyad, Jiantao Zai, Xuefeng Qian, Qiquan Qiao

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

Porous hollow tin oxide (SnO2) nanofibers and their composite with titanium dioxide (TiTiO2) particles (Degussa P25) were investigated as a photoanode for dye-sensitized solar cells. Incorporation of TiTiO2 particles in porous hollow SnO2 fibers enhanced the power conversion efficiency (η) from 4.06% to 5.72% under 100-mW/cm2 light intensity. The enhancement of efficiency was mainly attributed to increase in current density ( Jsc) and improvement in fill factor (FF). Increase in Jsc was caused by higher dye loading as indicated by UV-Vis absorption spectra and the improvement in FF was attributed to faster charge transport time as obtained from transient analysis. The microstructure of SnO2 fibers was studied using transmission electron microscope, scanning electron microscope, and X-ray diffraction. The electron transfer and recombination life times were studied using transient analysis, whereas interfacial charge transfer was studied using electrochemical impedance spectroscopy.

Original languageEnglish (US)
Article number7101817
Pages (from-to)2027-2032
Number of pages6
JournalIEEE Transactions on Electron Devices
Volume62
Issue number6
DOIs
StatePublished - Jun 1 2015
Externally publishedYes

Keywords

  • Dye-sensitized solar cells (DSSCs)
  • hollow
  • nanofibers
  • porous
  • tin oxide (SnO).

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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