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Porous N-doped-carbon coated CoSe2 anchored on carbon cloth as 3D photocathode for dye-sensitized solar cell with efficiency and stability outperforming Pt

查看全文 作　　者：Wenli [1]Lu;Rui [1]Jiang;Xiong [1]Yin;Leyu [1]Wang 高影响力作者 机构地区：[1]State Key Laboratory of Chemical Resource Engineering,Beijing Advanced Innovation Center for Soft Matter Science and Engineering,Beijing University oj Chemical Technology,Beijing 100029,China高影响力机构 出　　处：《Nano Research》索引2019年第12卷第1期,共5页高影响力期刊 基　　金：the National Natural Science Foundation of China(Nos.21725501,21771019,21475007 and 21675009);the Fundamental Research Funds for the Central Universities(Nos.buctrc201706,buctrc201815 and buctrc201812). 摘　　要：Photocathode with superior catalytic activity,long-term stability,and fast mass/electron transfer is highly desirable but challenging for dye-sensitized solar cell(DSC).Herein,the ZIF-67 grown on carbon cloth is successfully transformed into CoSe2 embedded in N-doped carb on nano cage(CoSe2/N-C)via a growth-carbonization-selenization process.The carb on cloth supported CoSe2/N-C,as photocathode of DSC,demonstrates a good long-term stability and high photovoltaic efficiency(8.40%),outperforming Pt.The good efficiency can be attributed to the high catalytic activity of CoSe2,fast mass tran sfer of porous three-dimensi on al(3D)structure,and good electr on transport derived from the intimate con tact between CoSe2 and highly conductive carb on cloth.The high stability would be ascribed to N-doped carbon coating that perfectly prevents CoSe2 from decomposition.This work will pave the way to develop highly efficient and stable Pt-free photocathode for DSC. 关 键 词：three-dimensional(3D)photocathode METAL-ORGANIC framework SELENIZATION process CoSe2 CARBON cloth tri-iodide reduction reaction
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