Toward plasmonic solar cells: Protection of silver nanoparticles via atomic layer deposition of TiO 2

Stacey D. Standridge, George C. Schatz, Joseph T. Hupp

Research output: Contribution to journalArticlepeer-review

212 Citations (Scopus)

Abstract

Plasmonic silver nanoparticles have unique properties that lend themselves to unusual optical applications, potentially including use as absorption amplifiers in dye-sensitized solar cells (DSSCs). However, these particles are easily damaged under oxidizing conditions. Atomic layer deposition of TiO 2 onto transparent-conductive-oxide-supported silver particles was examined as a means of protecting particles while simultaneously incorporating them into DSSC-functional photoelectrodes. The resulting assemblies were exposed to corrosive I -/I 3 - solutions, and the degree of silver etching was determined via scanning electron microscopy and ultraviolet - visible spectroscopy. To form a pinhole-free (i.e., fully protective) crystalline TiO 2 layer, 7.7 nm (300 cycles) must be deposited. If, however, a 0.2 nm (2 cycles) Al 2O 3 adhesion layer is included, only 5.8 nm (211 cycles) of TiO 2 are necessary for the formation of a pinhole-free coating.

Original languageEnglish
Pages (from-to)2596-2600
Number of pages5
JournalLangmuir
Volume25
Issue number5
DOIs
Publication statusPublished - Mar 3 2009

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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