Indium-tin-oxide-based transparent conducting layers for highly efficient photovoltaic devices

Sangwook Lee, Jun Hong Noh, Shin Tae Bae, In Sun Cho, Jin Young Kim, Hyunho Shin, Jung Kun Lee, Hyun Suk Jung, Kug Sun Hong

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

Additional hydrogen (H2) annealing and subsequent electrochemical treatment are found to make tin-doped indium oxide (ITO)-based photoelectrodes suitable for highly efficient dye sensitized solar cells. The additional H2 annealing process recovered the electrical conductivity of the ITO film the same as its initial high conductivity, which enhanced the charge collecting property. Moreover, the employment of electrochemical oxidation of TiO2/ITO photoelectrode improved the energy conversion efficiency of the ITO-based dyesensitized solar cells (DSSC), higher than that of a conventional FTO-based DSSC. Electrochemical impedance analysis showed that the H2 annealing process reduced the internal resistance of the cell, i.e., the resistance of the ITO and the Schottky barrier at the TiO 2/ITO interface were reduced, and that the electrochemical treatment recovered the diodelike characteristics of the DSSC by retarding back electron transfer from the photoelectrode to the electrolyte. The present work demonstrates that thermally and electrochemically modified ITO-based photoelectrode is another alternative to the conventionally used FTO-based photoelectrode.

Original languageEnglish
Pages (from-to)7443-7447
Number of pages5
JournalJournal of Physical Chemistry C
Volume113
Issue number17
DOIs
Publication statusPublished - 2009 Apr 30
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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