Journal
OPTICAL MATERIALS EXPRESS
Volume 6, Issue 4, Pages 1024-1031Publisher
OPTICAL SOC AMER
DOI: 10.1364/OME.6.001024
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- Ministry of Science and Technology of Taiwan [MOST 101-2112-M-018-002-MY3, 104-2811-M-018-001, 103-2622-E-018-007-CC3, 102-2112-M-029-005-MY3, 104-2112-M-018-003-MY3]
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We investigate the effects of liquid crystals (LCs) on the power conversion efficiency of dye-sensitized solar cells (DSSCs). The photovoltaic and electrochemical impedance spectra indicate that minute amounts of LC dopant decrease the short-current density of DSSCs because the doped LCs reduce the electrochemical reaction rate between DSSC counter electrode and electrolyte. The doped LCs delay the degradation rates of DSSCs because of the interaction between cyano groups of the doped LCs and organic solvent in the liquid electrolyte. Owing to the molecular interaction, the doped LCs increase the viscosity and stability, thereby inhibiting the evaporation rate of the liquid electrolyte. (C) 2016 Optical Society of America
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