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Room Temperature Deposition of Crystalline Nanoporous ZnO Nanostructures for Direct Use as Flexible DSSC Photoanode.

Authors
  • Han, Byung Suh1
  • Caliskan, Salim2
  • Sohn, Woonbae1
  • Kim, Miyoung1
  • Lee, Jung-Kun2
  • Jang, Ho Won3
  • 1 Department of Materials Science Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 151-744, South Korea. , (North Korea)
  • 2 Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA, 15261, USA.
  • 3 Department of Materials Science Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 151-744, South Korea. [email protected] , (North Korea)
Type
Published Article
Journal
Nanoscale Research Letters
Publisher
Springer (Biomed Central Ltd.)
Publication Date
Dec 01, 2016
Volume
11
Issue
1
Pages
221–221
Identifiers
DOI: 10.1186/s11671-016-1437-2
PMID: 27112352
Source
Medline
Keywords
License
Unknown

Abstract

A facile approach to fabricate dye-sensitized solar cells (DSSCs) is demonstrated by depositing (001) oriented zinc oxide (ZnO) nanostructures on both glass and flexible substrates at room temperature using pulsed laser deposition. Unique crystallographic characteristics of ZnO combined with highly non-equilibrium state of pulsed laser-induced ablated species enabled highly crystalline ZnO nanostructures without aid of any chemically induced additives or organic/inorganic impurities at room temperature. Film morphology as well as internal surface area is tailored by varying ambient oxygen pressure and deposition time. It is revealed that the optimization of these two experimental factors was essential for achieving structure providing large surface area as well as efficient charge collection. The DSSCs with optimized ZnO photoanodes showed overall efficiencies of 3.89 and 3.4 % on glass and polyethylene naphthalate substrates, respectively, under AM 1.5G light illumination. The high conversion efficiencies are attributed to elongated electron lifetime and enhanced electrolyte diffusion in the high crystalline ZnO nanostructures, verified by intensity-modulated voltage spectroscopy and electrochemical impedance measurements.

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