Optimizing scattering layer for efficient dye sensitized solar cells based on TiO2 nanofiber

Lijun Yang, Woon Fong Leung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)

Abstract

A one-dimensional nanostructure scattering layer, composed of electrospun TiO2nanofibers with bigger-diameter, is introduced in-situ on top of the photoanode made of smaller-diameter TiO2nanofibers to extend the light path, thereby improving the power conversion efficiency of dye sensitized solar cell. Different configurations are investigated to achieve optimal design for the photoanode. Light trapping effect by the scattering layer is found to be related to the thickness of the photoanode, and the thicker is the photoanode the weaker is the scattering effect. Furthermore, the thickness of the scattering layer in relation to the total thickness of the photoanode needs to be optimized balancing the dye-loading capacity of smaller diameter nanofibers and the light-trapping capacity of bigger diameter nanofibers. A high efficiency of 9.28% is achieved when the optimal thickness of the scattering layer is one seventh of the photoanode thickness of 9.3 μm.
Original languageEnglish
Pages (from-to)7-11
Number of pages5
JournalPolyhedron
Volume82
DOIs
Publication statusPublished - 4 Nov 2014

Keywords

  • Dye loading
  • Dye sensitized solar cell
  • Light harvesting
  • Nanofiber
  • Scattering layer

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Materials Chemistry
  • Physical and Theoretical Chemistry

Cite this