Dan Xu, Xiaojian Chen, Lei Wang, Lihua Qiu, Haigang Zhang, Feng Yan*（严锋）
Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
Electrochim. Acta 2013, 106，181-186.
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.
链接： //www.sciencedirect.com/science/article/pii/S0013468613010141
