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Fe 3 W 3 C/WC/Graphitic Carbon Ternary Nanojunction Hybrids for Dye‐Sensitized Solar Cells
Author(s) -
Liao Yongping,
Xie Ying,
Pan Kai,
Wang Guofeng,
Pan Qingjiang,
Zhou Wei,
Wang Lei,
Jiang Baojiang,
Fu Honggang
Publication year - 2015
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.201402654
Subject(s) - ternary operation , materials science , nanoclusters , x ray photoelectron spectroscopy , catalysis , carbon fibers , work function , electrochemistry , chemical engineering , electron transfer , metal , nanotechnology , electrode , chemistry , composite number , organic chemistry , metallurgy , composite material , computer science , engineering , programming language
Fe 3 W 3 C/WC/graphitic carbon (GC) ternary nanojunction hybrids are synthesized through a solid‐state pyrolysis process for dye‐sensitized solar cells (DSSCs). First‐principles calculations have been first employed to investigate the adsorption energy between I 3 − and Fe 3 W 3 C and WC nanoclusters. Scanning Kelvin probe images indicate that the work function changes greatly due to the formation of ternary nanojunctions, which favor fast photoelectron transfer. A photoelectrical conversion efficiency of 7.1 % is achieved based on Fe 3 W 3 C/WC/GC hybrid counter electrodes, which is much higher than those of pure GC (5.02 %) and WC/GC hybrids (6.11 %). It has been further revealed that Fe 3 W 3 C/WC/GC hybrid counter electrodes exhibit the best catalytic performances according to relevant electrochemical measurements, which can be attributed to fast photoelectron transfer due to the ternary junctions and the addition of Fe 3 W 3 C with more catalytic metallic atoms.