How to Optimize the Interface between Photosensitizers and TiO2 Nanocrystals with Molecular Engineering to Enhance Performances of Dye-Sensitized Solar Cells?
文献类型：期刊论文
| 作者 | Zheng, Jiaxin1; Zhang, Kai2,3; Fang, Yanyan4; Zuo, Yunxing1; Duan, Yandong1; Zhuo, Zengqing1,5; Chen, Xuanming2,3; Yang, Wanli5; Lin, Yuan1,4; Wong, Man Shing2,3 |
| 刊名 | ACS APPLIED MATERIALS & INTERFACES
 |
| 出版日期 | 2015-11-18 |
| 卷号 | 7期号:45页码:25341-25351 |
| 关键词 | DSSCs metal-free photosensitizer interface steric effect electronic structure ab initio calculations |
| 英文摘要 | In this work, the interfacial properties of a series of metal-free organic naphthodithienothiophene (NDTT)-based photosensitizers adsorbed on TiO2 surfaces were investigated by a combination of ab initio calculations and experimental measurements. The calculations and experiments reveal that because of the efficient charge transfer from the adsorbed dyes to TiO2 nanocrystal surface there is an upward shift for the energy levels of dyes and a downward shift for the conduction band of surface TiO2 and that the band gaps for both of them are also reduced. Such electronic level alignments at the interface would lead to increased light absorption range by adsorbed dyes and increased driving force for charge injection but reduced open-circuit potential (V-oc). More interestingly, we found that molecule engineering of the donor group and introducing additional electron-withdrawing unit have little effect on the electronic level alignments at the interface (because band gaps of the dyes adsorbed on TiO2 surfaces become approximately identical when compared with those of the dyes measured in solution) but that they can affect the steric effect and the charge separation at the interface to tune Voc and the short-circuit current density (J(sc)) effectively. All these findings suggest that optimizing the interfacial properties of dyes adsorbed on TiO2 surfaces by synchronously modifying steric effects of dye molecules anchored on TiO2 and charge-transfer and separation properties at the interfaces is important to construct efficient dye-sensitized solar cells. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2016-05-09 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/29296]  |
| 专题 | 化学研究所_光化学实验室 |
| 作者单位 | 1.Peking Univ, Shenzhen Grad Sch, Sch Adv Mat, Shenzhen 518055, Peoples R China 2.Hong Kong Baptist Univ, Dept Chem, Kowloon, Hong Kong, Peoples R China 3.Hong Kong Baptist Univ, Inst Mol Funct Mat, Kowloon, Hong Kong, Peoples R China 4.Chinese Acad Sci, Inst Chem, Key Lab Photochem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 5.Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA |
| 推荐引用方式 GB/T 7714 | Zheng, Jiaxin,Zhang, Kai,Fang, Yanyan,et al. How to Optimize the Interface between Photosensitizers and TiO2 Nanocrystals with Molecular Engineering to Enhance Performances of Dye-Sensitized Solar Cells?[J]. ACS APPLIED MATERIALS & INTERFACES,2015,7(45):25341-25351. |
| APA | Zheng, Jiaxin.,Zhang, Kai.,Fang, Yanyan.,Zuo, Yunxing.,Duan, Yandong.,...&Pan, Feng.(2015).How to Optimize the Interface between Photosensitizers and TiO2 Nanocrystals with Molecular Engineering to Enhance Performances of Dye-Sensitized Solar Cells?.ACS APPLIED MATERIALS & INTERFACES,7(45),25341-25351. |
| MLA | Zheng, Jiaxin,et al."How to Optimize the Interface between Photosensitizers and TiO2 Nanocrystals with Molecular Engineering to Enhance Performances of Dye-Sensitized Solar Cells?".ACS APPLIED MATERIALS & INTERFACES 7.45(2015):25341-25351. |
入库方式： OAI收割
来源：化学研究所
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