Three dimensional indium-tin-oxide nanorod array for charge collection in dye-sensitized solar cells

Byunghong Lee, Peijun Guo, Shi Qiang Li, D. Bruce Buchholz, Robert P.H. Chang

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

In this article, we report the design, fabrication, characterization, and simulation of three-dimensional (3D) dye-sensitized solar cells (DSSCs), using ordered indium-tin-oxide (ITO) nanorod (NR) arrays as the photoanode, and compare them with conventional planar (2D) DSSCs. The ITO NR array used in the 3D cell greatly improves its performance by providing shorter electron pathways and reducing the recombination rate of the photogenerated electrons. We observed a 10-20% enhancement of the energy conversion efficiency, primarily due to an increased short circuit current. This finding supports the concept of using 3D photoanodes with optically transparent and conducting nanorods for the enhancement of the energy-harvesting devices that require short charge collection distance without sacrificing the optical thickness. Thus, unlike the conventional solar cell structure, the functions for photon collection and charge transport are decoupled to allow for improved cell designs.

Original languageEnglish
Pages (from-to)17713-17722
Number of pages10
JournalACS Applied Materials and Interfaces
Volume6
Issue number20
DOIs
Publication statusPublished - Oct 22 2014

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Keywords

  • air spray
  • charge collection
  • dye sensitized solar cell
  • finite element modeling
  • indium-tin-oxide nanorod
  • photonic crystal

ASJC Scopus subject areas

  • Materials Science(all)

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