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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