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

作者：Wu Sung Lin^*; Lu Hsueh Pei; Yu Han Ting; Chuang Shu Han; Chiu Chien Lan; Lee Cheng Wei; Diau Eric Wei Guang; Yeh Chen Yu

来源：Energy & Environmental Science, 2010, 3(7): 949-955.

DOI：10.1039/c003872p

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 p-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 similar to 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.

• 出版日期2010