Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/94502
標題: 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
周憲辛
關鍵字: Mulliken charge
charge transfer
density-functional
dye-sensitized solar cells
electron-donating
porphyrin sensitizers
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 acid (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://hdl.handle.net/11455/94502
Appears in Collections:化學系所

文件中的檔案:

取得全文請前往華藝線上圖書館



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.