Fabrication and photovoltaic characterization of bio-sensitized solar cells using myoglobin-based sensitizers

Chih Wei Chang, Chin Hao Chang, Hsueh Pei Lu, Tung-Kung Wu, Wei-Guang Diau

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Myoglobin (Mb), reconstituted zinc protoporphyrin-apomyoglobin (ZnMb), and eosin-modified ZnMb (EoZnMb) were used as photosensitizers to functionalize TiO 2 nanocrystalline films for bio-sensitized solar-cell (BSSC) applications. For the Mb-sensitized SC, the poor cell performance was due to a reduction Fe(lll) - Fe(ll) that produces a photocurrent density of the device smaller than its unsensitized counterpart. The efficiencies of power conversion of both ZnMb and EoZnMb-sensitized SC were enhanced about ten times due to superior charge separation between TiO 2 and the protein, and due to smaller current leakage between TiO2 and the electrolyte. The cell performances of the BSSC devices are discussed in terms of an equivalent-circuit model.

Original languageEnglish
Pages (from-to)1688-1695
Number of pages8
JournalJournal of Nanoscience and Nanotechnology
Volume9
Issue number3
DOIs
StatePublished - 1 Mar 2009

Keywords

  • Apomyoglobin
  • BSSC
  • DSSC
  • Eosin
  • Myoglobin
  • Porphyrin

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