The authors acknowledge financial support from the National Natural Science Foundation of China (Grant Nos. 50 572 030 and 50 372 022) and the Nanomaterials Special of Scientific Program of Fujian Province, P.R. China (No. 2005HZ01-4).
A Thermoplastic Gel Electrolyte for Stable Quasi-Solid-State Dye-Sensitized Solar Cells†
Article first published online: 21 AUG 2007
Copyright © 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Functional Materials
Volume 17, Issue 15, pages 2645–2652, October, 2007
How to Cite
Wu, J. H., Hao, S. C., Lan, Z., Lin, J. M., Huang, M. L., Huang, Y. F., Fang, L. Q., Yin, S. and Sato, T. (2007), A Thermoplastic Gel Electrolyte for Stable Quasi-Solid-State Dye-Sensitized Solar Cells. Adv. Funct. Mater., 17: 2645–2652. doi: 10.1002/adfm.200600621
- Issue published online: 11 OCT 2007
- Article first published online: 21 AUG 2007
- Manuscript Revised: 12 APR 2007
- Manuscript Received: 14 JUL 2006
- National Natural Science Foundation of China. Grant Numbers: 50 572 030, 50 372 022
- Nanomaterials Special of Scientific Program of Fujian Province, P.R. China. Grant Number: 2005HZ01-4
- Solar cells, dye-sensitized
Dye-sensitized solar cells (DSSCs) are receiving considerable attention as low-cost alternatives to conventional solar cells. In DSSCs based on liquid electrolytes, a photoelectric efficiency of 11 % has been achieved, but potential problems in sealing the cells and the low long-term stability of these systems have impeded their practical use. Here, we present a thermoplastic gel electrolyte (TPGE) as an alternative to the liquid electrolytes used in DSSCs. The TPGE exhibits a thermoplastic character, high conductivity, long-term stability, and can be prepared by a simple and convenient protocol. The viscosity, conductivity, and phase state of the TPGE can be controlled by tuning the composition. Using 40 wt % poly(ethylene glycol) (PEG) as the polymeric host, 60 wt % propylene carbonate (PC) as the solvent, and 0.65 M KI and 0.065 M I2 as the ionic conductors, a TPGE with a conductivity of 2.61 mS cm–2 is prepared. Based on this TPGE, a DSSC is fabricated with an overall light-to-electrical-energy conversion efficiency of 7.22 % under 100 mW cm–2 irradiation. The present findings should accelerate the widespread use of DSSCs.