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Published on: September 12, 2014
Dihydrophenanthrene-based metal-free dyes for highly efficient cosensitized solar cells
Ryan Yeh-Yung Lin1, Yung-Sheng Yen, Yung-Tse Cheng
1Institute of Chemistry, Academia Sinica , Nankang, Taipei 11529, Taiwan, Department of Chemical Engineering, National Taiwan University , Taipei, 10617, Taiwan, Department of Chemistry, Chinese Culture University , Taipei, Taiwan, and Institute of Polymer Science and Engineering, National Taiwan University , Taipei 10617, Taiwan.
Abstract:
Metal-free dyes (BP-1 to BP-3) containing a 9,10-dihydrophenanthrene unit in the spacer have been synthesized. The dye with the highest cell efficiency, BP-2, was used in combination with SQ2 for cosensitized DSSCs. The cosensitized DSSC in which the ratio of BP-2 and SQ2 is 8:2 (v/v) has a record high efficiency of 8.14% among cosensitized systems using all metal-free sensitizers. Dye distribution along the TiO2 film depth was analyzed by an Auger electron spectroscopy technique.
