화학공학소재연구정보센터
Electrochimica Acta, Vol.106, 181-186, 2013
Performance enhancement for high performance dye-sensitized solar cells via using pyridinyl-functionalized ionic liquid type additive
A pyridinyl-functionalized ionic liquid, N-butyl-N'-(4-pyridylheptyl)imidazolium bromide ([BuPyIm]Br), is synthesized and applied as an additive for dye-sensitized solar cells (DSSCs). Compared with the volatile organic additive, 4-tert-butyl pyridine (TBP) (generally 0.5 M in the electrolyte), [BuPyIm]Br can be used at a very low concentration (0.1 M in the electrolyte) for high overall power conversion efficiency DSSCs, which shows an overall power conversion efficiency of 5.67% under the simulated air mass 1.5 solar spectrum illumination at 100 mW cm(-2) and 6.69% at 15 mW cm(-2), respectively. Furthermore, [BuPyIm]Br-based DSSCs show better long-term stability than that of TBP-based devices. These results indicate that the DSSC devices based on the pyridinyl-functionalized ionic liquid additive can overcome the drawbacks of the volatile organic additive, and offer a feasible method to fabricate DSSCs in future practical applications. Crown Copyright (c) 2013 Published by Elsevier Ltd. All rights reserved.