TiCl_4 assisted formation of nano-TiO_2 secondary structure in photoactive electrodes for high efficiency dye-sensitized solar cells  

作　　者：LAN Zhang WU JiHuai LIN JianMing HUANG MiaoLiang 

机构地区：[1]Engineering Research Center of Environment-Friendly Functional Materials,Ministry of Education [2]Key Laboratory of Functional Materials for Fujian Higher Education [3]Institute of Materials Physical Chemistry,Huaqiao University

出　　处：《Science China Chemistry》2014年第6期888-894,共7页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (U1205112,51002053);the Key Project of the Chinese Ministry of Education (212206);the Programs for Prominent Young Talents and New Century Excellent Talents in Fujian Province University;the Promotion Program for Yong and Middle-aged Teacher in Science and Technology Research of Huaqiao University (ZQN- YX102)

摘　　要：A new kind of photoactive electrodes with nanocrystalline TiO2(nano-TiO2)secondary structure is successfully prepared via a simple method of adding a small amount of TiCl4 2-propanol solution in conventional nano-TiO2 paste to form micro-sized nano-TiO2 aggregates.The benefits of this special structure include improved optical absorption,increased light scattering ability,and enhanced electron transport and collection efficiency.Dye-sensitized solar cells(DSCs)based on these photoactive electrodes show improved performance.The power conversion efficiency of the cells can be increased from 5.03%to 7.30%by substituting 6μm conventional nano-TiO2 thin film with the same thickness of as-prepared nano-TiO2 aggregates film in the photoactive electrodes.A higher power conversion efficiency of the cells can be obtained by further increasing the thickness of the nano-TiO2 aggregates film.A new kind of photoactive electrodes with nanocrystalline TiO2（nano-TiO2）secondary structure is successfully prepared via a simple method of adding a small amount of TiCl4 2-propanol solution in conventional nano-TiO2 paste to form micro-sized nano-TiO2 aggregates.The benefits of this special structure include improved optical absorption,increased light scattering ability,and enhanced electron transport and collection efficiency.Dye-sensitized solar cells（DSCs）based on these photoactive electrodes show improved performance.The power conversion efficiency of the cells can be increased from 5.03%to 7.30%by substituting 6μm conventional nano-TiO2 thin film with the same thickness of as-prepared nano-TiO2 aggregates film in the photoactive electrodes.A higher power conversion efficiency of the cells can be obtained by further increasing the thickness of the nano-TiO2 aggregates film.

关 键 词：dye-sensitized solar cell photoactive electrode secondary structure titanium tetrachloride additive 

分 类 号：TQ134.11[化学工程—无机化工] TM914.4[电气工程—电力电子与电力传动]