中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Precise Identification and Manipulation of Adsorption Geometry of Donor-pi-Acceptor Dye on Nanocrystalline TiO2 Films for Improved Photovoltaics

文献类型:期刊论文

作者Zhang, F ; Ma, W ; Jiao, Y ; Wang, JC ; Shan, XY ; Li, H ; Lu, XH ; Meng, S
刊名ACS APPLIED MATERIALS & INTERFACES
出版日期2014
卷号6期号:24页码:22359
关键词adsorption structure manipulation cyanoacrylic acid vibrational spectra dye-sensitized solar cell enhanced efficiency
ISSN号1944-8244
通讯作者Meng, S (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要Adsorption geometry of dye molecules on nanocrystalline TiO2 plays a central role in dye-sensitized solar cells, enabling effective sunlight absorption, fast electron injection, optimized interface band offsets, and stable photovoltaic performance. However, precise determination of dye binding geometry and proportion has been challenging due to complexity and sensitivity at interfaces. Here employing combined vibrational spectrometry and density functional calculations, we identify typical adsorption configurations of widely adopted cyanoacrylic donor-p bridge-acceptor dyes on nanocrystalline TiO2. Binding mode switching from bidentate bridging to hydrogen-bonded monodentate configuration with TiN bonding has been observed when dye-sensitizing solution becomes more basic. Raman and infrared spectroscopy measurements confirm this configuration switch and determine quantitatively the proportion of competing binding geometries, with vibration peaks assigned using density functional theory calculations. We further found that the proportion of dye-binding configurations can be manipulated by adjusting pH value of dye-sensitizing solutions. Controlling molecular adsorption density and configurations led to enhanced energy conversion efficiency from 2.4% to 6.1% for the fabricated dye-sensitized solar cells, providing a simple method to improve photovoltaic performance by suppressing unfavorable binding configurations in solar cell applications.
资助信息MOST [2012CB921403, 2012CB933002]; NSFC [11222431, 11474328, 11074287]; "Open Research Fund Program" of the State Key Laboratory of Low-Dimensional Quantum Physics [KF201201]; "Strategic Priority Research Program (B)" of the CAS [XDB07030100]
语种英语
公开日期2015-04-14
源URL[http://ir.iphy.ac.cn/handle/311004/58780]  
专题物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式
GB/T 7714
Zhang, F,Ma, W,Jiao, Y,et al. Precise Identification and Manipulation of Adsorption Geometry of Donor-pi-Acceptor Dye on Nanocrystalline TiO2 Films for Improved Photovoltaics[J]. ACS APPLIED MATERIALS & INTERFACES,2014,6(24):22359.
APA Zhang, F.,Ma, W.,Jiao, Y.,Wang, JC.,Shan, XY.,...&Meng, S.(2014).Precise Identification and Manipulation of Adsorption Geometry of Donor-pi-Acceptor Dye on Nanocrystalline TiO2 Films for Improved Photovoltaics.ACS APPLIED MATERIALS & INTERFACES,6(24),22359.
MLA Zhang, F,et al."Precise Identification and Manipulation of Adsorption Geometry of Donor-pi-Acceptor Dye on Nanocrystalline TiO2 Films for Improved Photovoltaics".ACS APPLIED MATERIALS & INTERFACES 6.24(2014):22359.

入库方式: OAI收割

来源:物理研究所

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