Effect of a ga-doped ZnO thin film with a ZTO buffer layer fabricated by using pulsed DC magnetron sputter for dye-sensitized solar cells

Sang Woo Song, Kyung Ju Lee, Ji Hyung Roh, On Jeon Park, Hwan Sun Kim, Byung-Moo Moon, Min Woo Ji

Research output: Contribution to journalArticle

Abstract

The electrical property of a Ga-doped ZnO(GZO) thin film is well known to be similar that of commercialized fluorine-doped tin oxide(FTO). However GZO is limited for use at high process temperatures for solar cells because of its unstable resistivity at temperatures above 300 °C. A GZO thin film compared to zinc tin oxide(ZTO)-GZO multilayer can be used at high process temperatures. A GZO thin film was deposited on glass by using pulsed DC magnetron sputter. Then, a ZTO buffer layer was deposited on the GZO surface. During the deposition, the working pressure was 5 mTorr (Z-1 glass) and 1 mTorr (Z-2 glass). Dye-sensitized solar cells (DSSCs) were fabricated using Z-1, Z-2 and commercialized FTO glasses. Z-2 showed a conversion efficiency of 4.265%, which was enhanced by 0.399% compared to that of the DSSCs using FTO(3.784%). The conversion efficiency for Z-1 (3.889%) was a little higher than that of FTO. Thus, the ZTO-GZO electrode showed better characteristics than those obtained using the FTO electrode, which can be attributed to the reduced charge recombination and series resistance.

Original languageEnglish
Pages (from-to)308-311
Number of pages4
JournalJournal of the Korean Physical Society
Volume65
Issue number3
DOIs
Publication statusPublished - 2014 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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