High-Performance Cobalt Selenide and Nickel Selenide Nanocomposite Counter Electrode for Both Iodide/Triiodide and Cobalt(II/III)Redox Couples in Dye-Sensitized Solar Cells  

作　　者：Zaiwei Wang Hongxia Xu Zhongyi Zhang Xinhong Zhou Shuping Pang Guanglei Cui 

机构地区：[1]Qingdao Key Lab of Solar Energy Utilization and Energy Storage Technology,Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Qingdao,Shandong 266101,China [2]University of Chinese Academy of Sciences,Beijing 100080,China [3]Qingdao University of Science and Technology,Qingdao,Shandong 266101,China

出　　处：《Chinese Journal of Chemistry》2014年第6期491-497,共7页中国化学（英文版）

基　　金：This work was supported by the National Program on Key Basic Research Project of China(973 Program)(No.MOST2011CB935700);the National Natural Sci-ence Foundation of China(Nos.21202178,21271180);the Shandong Province Natural Science Foundation(Nos.ZR2011BQ024,ZR2013FZ001 and ZR2010BM016).

摘　　要：The nanocomposites of cobalt selenide and nickel selenide(Co_(0.85)Se/Ni_(0.85)Se)were successfully fabricated on FTO glass by a facile co-electrodeposition method at ambient temperature.Nanocomposite films were used as elec-trocatalysts in dye-sensitized solar cell counter electrodes for regeneration of both iodide/triiodide and cobalt(II/III)redox couples.Co_(0.85)Se/Ni_(0.85)Se were mainly composed of nanoflakes and nanoparticles.It is noted that such nanostructure generated by nanoparticles embedded with 2D nanoflakes led to high active sites and was accessible to cobalt(II/III)electrolyte,delivering better catalytic activity for the reduction of larger volume cobalt(II/III).As a result,for cobalt(II/III)electrolyte,the Co_(0.85)Se/Ni_(0.85)Se based dye-sensitized solar cell performed significantly im-proved efficiency than that of Pt and Co_(0.85)Se.Meanwhile,the Co_(0.85)Se/Ni_(0.85)Se based dye-sensitized solar cell held comparable energy conversion efficiency to that of Pt and Co_(0.85)Se for iodide/triiodide electrolyte.

关 键 词：counter electrode dye-sensitized solar cells iodide/triiodide cobalt(II/III) metal selenide 

分 类 号：O64[理学—物理化学]