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The Role of Mott–Schottky Heterojunctions in Ag–Ag 8 SnS 6 as Counter Electrodes in Dye‐Sensitized Solar Cells
Author(s) -
He Qingquan,
Huang Shoushuang,
Wang Cheng,
Qiao Qiquan,
Liang Na,
Xu Miao,
Chen Wenlong,
Zai Jiantao,
Qian Xuefeng
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.201403343
Subject(s) - heterojunction , materials science , schottky barrier , oleylamine , electrode , auxiliary electrode , semiconductor , electron transfer , metal , etching (microfabrication) , optoelectronics , electrolyte , nanotechnology , chemistry , photochemistry , nanocrystal , metallurgy , layer (electronics) , diode
Well‐defined uniform pyramidal Ag–Ag 8 SnS 6 heterodimers are prepared via a one‐pot method. A plausible formation mechanism for the unique structures based on a seed‐growth process and an etching effect due to oleylamine is proposed. The formed metal–semiconductor Mott–Schottky heterojunction promotes electron transfer from semiconducting Ag 8 SnS 6 to metallic Ag, which catalyzes the reduction of I 3 − to I − . When used as counter electrode in dye‐sensitized solar cells, the heterodimers show comparable performance to platinum.