Low-Temperature and Surfactant-Free Synthesis of Mesoporous TiO_2 Sub-Micron Spheres for Efficient Dye-Sensitized Solar Cells  

作　　者：Kaimo Deng Liang Li 

机构地区：[1]College of Physics,Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology,Soochow University

出　　处：《Journal of Materials Science & Technology》2016年第1期17-23,共7页材料科学技术（英文版）

基　　金：support from the National Natural Science Foundation(Nos.51422206,51372159,11304217);the 1000 Youth Talents Plan,the National Program on Key Basic Research Project of China (973 Program,No. 2015CB358600);the Jiangsu Shuangchuang Plan;the Project Supported by Jiangsu Science and Technology Committee for Distinguished Young Scholars (BK20140009);funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)

摘　　要：Dye-sensitized solar cells （DSSCs） are one of the most promising next-generation solar cells due to their advantages over other counterparts. The photoanode of DSSCs has a great effect on the photovoltaic per- formance. Traditional photoanode includes a bottom nanoparticle layer and an upper scattering layer for better light capture in longer wavelength. Mesoporous nanostructures with size comparable to the wavelength of visible light are considered to be excellent light scattering centers by providing extra places for dye loading. Developing a green synthetic method is of great importance. Herein we report a facile and surfactant-free synthesis of mesoporous futile TiO2 submicrometer-sized spheres at temperature as low as 70 ℃. DSSCs based on photoanodes with an upper scattering layer composed of as-obtained mesoporous spheres on nanoparticle dense layer demonstrate an 18.0% improvement of power conver- sion efficiency. This simple approach may offer an energy-efficient and environmentally friendly alternative for DSSCs fabrication.Dye-sensitized solar cells （DSSCs） are one of the most promising next-generation solar cells due to their advantages over other counterparts. The photoanode of DSSCs has a great effect on the photovoltaic per- formance. Traditional photoanode includes a bottom nanoparticle layer and an upper scattering layer for better light capture in longer wavelength. Mesoporous nanostructures with size comparable to the wavelength of visible light are considered to be excellent light scattering centers by providing extra places for dye loading. Developing a green synthetic method is of great importance. Herein we report a facile and surfactant-free synthesis of mesoporous futile TiO2 submicrometer-sized spheres at temperature as low as 70 ℃. DSSCs based on photoanodes with an upper scattering layer composed of as-obtained mesoporous spheres on nanoparticle dense layer demonstrate an 18.0% improvement of power conver- sion efficiency. This simple approach may offer an energy-efficient and environmentally friendly alternative for DSSCs fabrication.

关 键 词：Titanium dioxide Mesoporous Sub-micron Light scattering Dye-sensitized solar cells Energy harvesting 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TQ134.11[化学工程—无机化工]