标题: | Influence of Phenylethynylene of Push-Pull Zinc Porphyrins on the Photovoltaic Performance |
作者: | Chou, Hsien-Hsin Reddy, Kamani Sudhir K. Wu, Hui-Ping Guo, Bo-Cheng Lee, Hsuan-Wei Diau, Eric Wei-Guang Hsu, Chao-Ping Yeh, Chen-Yu 应用化学系 应用化学系分子科学硕博班 Department of Applied Chemistry Institute of Molecular science |
关键字: | charge transfer;densiWunctional;dye-sensitized solar cells;electron-donating;Mulliken charge;porphyrin sensitizers |
公开日期: | 10-二月-2016 |
摘要: | A series of zinc porphyrin dyes YD22-YD28 were synthesized and used for dye-sensitized solar cells. Dyes YD26-YD28 consist of zinc porphyrin (ZnP) as core unit, arylamine (Am) as electron-donating group, and p-ethynylbenzoic add (EBA) as an electron-withdrawing/-anchoring group. The dyes YD22-YD25 contain additional phenylethynylene group (PE) bridged between Am and ZnP units. The influence of the PE unit on molecular properties as well as photovoltaic performances were investigated via photophysical and electrochemical studies and density functional calculations. With the insertion of PE unit, the dyes YD22-YD25 possess better light-harvesting properties in terms of significantly red-shifted Q-band absorption. The conversion efficiencies for dyes YD22-YD25 are better than those of dyes YD26-YD28 owing to larger J(SC) output. Natural transition orbitals and Mulliken charge analysis were used to analyze the electron injection efficiency for porphyrin dyes upon time-dependent DFT calculations. The results indicated that insertion of additional PE unit is beneficial to higher J(SC) by means of improved light-harvesting property due to broadened and red-shifted absorption. |
URI: | http://dx.doi.org/10.1021/acsami.5b11554 http://hdl.handle.net/11536/132708 |
ISSN: | 1944-8244 |
DOI: | 10.1021/acsami.5b11554 |
期刊: | ACS APPLIED MATERIALS & INTERFACES |
Volume: | 8 |
Issue: | 5 |
起始页: | 3418 |
结束页: | 3427 |
显示于类别: | Articles |