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Enhanced Performance of Supported HfO 2 Counter Electrodes for Redox Couples Used in Dye‐Sensitized Solar Cells
Author(s) -
Yun Sining,
Pu Haihui,
Chen Junhong,
Hagfeldt Anders,
Ma Tingli
Publication year - 2014
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201301140
Subject(s) - triiodide , auxiliary electrode , redox , electrolyte , dye sensitized solar cell , iodide , electrode , catalysis , materials science , mesoporous material , energy conversion efficiency , inorganic chemistry , chemical engineering , chemistry , organic chemistry , optoelectronics , engineering
Mesoporous‐graphitic‐carbon‐supported HfO 2 (HfO 2 ‐MGC) nanohybrids were synthesized by using a soft‐template route. Characterization and a systematic investigation of the catalytic properties, stability, and catalytic mechanism were performed for HfO 2 ‐MGC counter electrodes (CEs) in dye‐sensitized solar cells (DSSCs). The new HfO 2 ‐MGC as a CE in DSSCs showed a surprisingly high efficiency of 7.75 % for the triiodide/iodide redox couple and 3.69 % for the disulfide/thiolate redox couple, greater than the Pt electrode in the corresponding electrolyte system, which opens up a possibility for its practical application.