Al-doped ZnO thin film: A new transparent conducting layer for ZnO nanowire-based dye-sensitized solar cells

Sung Hae Lee, Se Hoon Han, Hyun Suk Jung, Hyunjung Shin, Jagab Lee, Jun Hong Noh, Sangwook Lee, In Sun Cho, Jung Kun Lee, Jinyoung Kim, Hyunho Shin

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109 Citations (Scopus)

Abstract

In this study, an aluminum-doped zinc oxide (AZO) layer was used as a transparent conducting oxide (TCO) layer in ZnO nanowire (NW)-based dye-sensitized solar cells (DSSCs). The well aligned, single crystalline ZnO NW arrays that were grown on the AZO films exhibited a better DSSC performance (an increased photourrent density and fill factor) than those grown on the fluorine doped tin oxide (FTO) films. The I-V characteristics and electrohemical impedance spectroscopy measurements for the ZnO NW arrays on the AZO and FTO films clearly showed that the superior DSSC performance was caused by the facilitated charge injection from the ZnO NW to AZO, resulting from the formation of an ohmic contact. This study demonstrates that the AZO films are more favorable for highly efficient ZnO NW-based photoenergy conversion devices.

Original languageEnglish
Pages (from-to)7185-7189
Number of pages5
JournalJournal of Physical Chemistry C
Volume114
Issue number15
DOIs
Publication statusPublished - 2010 Apr 22
Externally publishedYes

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ASJC Scopus subject areas

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

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