Design and characterization of porphyrin sensitizers with a push-pull framework for highly efficient dye-sensitized solar cells

Sung Lin Wu, Hsueh Pei Lu, Han Ting Yu, Shu Han Chuang, Chien Lan Chiu, Cheng Wei Lee, Wei-Guang Diau, Chen Yu Yeh

Research output: Contribution to journalArticlepeer-review

160 Scopus citations

Abstract

Novel porphyrin dyes YD14-YD17 with a push-pull framework were synthesized for dye-sensitized solar cells (DSSC); their spectral, electrochemical and photovoltaic properties were investigated. The absorption bands of these porphyrin dyes are broadened and red-shifted upon introduction of electron-donating groups (EDG) to the meso-positions via extension of π-conjugation. Electrochemical tests show that the first oxidation for these porphyrins occurs at a potential greater than that of the I-/I 3 - redox couple, and attachment of EDGs to the periphery of the porphyrin facilitates electron abstraction. The photovoltaic measurements show that YD14 and YD17 have a power conversion efficiency of ∼7%. Introduction of EDGs to various meso-positions is demonstrated to be achievable, and porphyrin dyes with appropriate EDGs are promising candidates for highly efficient DSSCs.

Original languageEnglish
Pages (from-to)949-955
Number of pages7
JournalEnergy and Environmental Science
Volume3
Issue number7
DOIs
StatePublished - 5 Jul 2010

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