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Transparent Metal Selenide Alloy Counter Electrodes for High‐Efficiency Bifacial Dye‐Sensitized Solar Cells
Author(s) -
Duan Yanyan,
Tang Qunwei,
Liu Juan,
He Benlin,
Yu Liangmin
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201409422
Subject(s) - selenide , auxiliary electrode , materials science , alloy , electrode , dye sensitized solar cell , metal , optical transparency , optoelectronics , solar cell , electrochemistry , chemical engineering , electrolyte , nanotechnology , chemistry , metallurgy , selenium , engineering
The exploration of cost‐effective and transparent counter electrodes (CEs) is a persistent objective in the development of bifacial dye‐sensitized solar cells (DSSCs). Transparent counter electrodes based on binary‐alloy metal selenides (M‐Se; M=Co, Ni, Cu, Fe, Ru) are now obtained by a mild, solution‐based method and employed in efficient bifacial DSSCs. Owing to superior charge‐transfer ability for the I − /I 3 − redox couple, electrocatalytic activity toward I 3 − reduction, and optical transparency, the bifacial DSSCs with CEs consisting of a metal selenide alloy yield front and rear efficiencies of 8.30 % and 4.63 % for Co 0.85 Se, 7.85 % and 4.37 % for Ni 0.85 Se, 6.43 % and 4.24 % for Cu 0.50 Se, 7.64 % and 5.05 % for FeSe, and 9.22 % and 5.90 % for Ru 0.33 Se in comparison with 6.18 % and 3.56 % for a cell with an electrode based on pristine platinum, respectively. Moreover, fast activity onset, high multiple start/stop capability, and relatively good stability demonstrate that these new electrodes should find applications in solar panels.