期刊
JOURNAL OF POWER SOURCES
卷 262, 期 -, 页码 444-450出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2014.03.128
关键词
Dye-sensitized solar cell; Quasi-solid-state; Electrolyte; Low molecular mass organogelator; Electron transport and recombination; Stability
资金
- National Basic Research Program of China [2011CBA00700]
- National High Technology Research and Development Program of China [2011AA050510]
- National Natural Science Foundation of China [21103197, 21173227, 61204075]
- Program of Hefei Center for Physical Science and Technology [2012FXZY006]
High stability is a significant target for practical applications of dye-sensitized solar cells. 2-(1-oxododecyl)hydrazide, a diamide derivative, is synthesized and applied in quasi-solid-state dye-sensitized solar cells (QS-DSSCs) as a low molecular mass organogelator (LMOG). It is noteworthy that the transition temperature from gel state to liquid state (T-gel) of this gel electrolyte is 125.2 degrees C, which ensures the gel state of the electrolyte at the DSSC operating temperature. The influences of the gel electrolyte on the kinetic processes of electron transport and recombination are investigated. The diffusion of redox species in the gel electrolyte is hindered by the crosslinked network, and the decreased electron recombination lifetime indicates an increased electron recombination in QS-DSSC. Significantly, the QS-DSSC exhibits excellent thermal and light-soaking stabilities during accelerated aging tests for 1000 h. Especially, there is almost no change in the short-circuit current density (J(SC)) in the QS-DSSC, while the J(SC) of the liquid electrolyte based DSSC decreases to 79-90% of their initial values. These results are very important for the application and commercialization of DSSCs. (C) 2014 Elsevier B.V. All rights reserved.
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