標題: Synthesis and characterization of porphyrin sensitizers with various electron-donating substituents for highly efficient dye-sensitized solar cells
作者: Hsieh, Chou-Pou
Lu, Hsueh-Pei
Chiu, Chien-Lan
Lee, Cheng-Wei
Chuang, Shu-Han
Mai, Chi-Lun
Yen, Wei-Nan
Hsu, Shun-Ju
Diau, Eric Wei-Guang
Yeh, Chen-Yu
應用化學系
Department of Applied Chemistry
公開日期: 2010
摘要: A series of porphyrin dyes with an electron-donating group (EDG) attached at a meso-position (YD1-YD8) have been designed and synthesized for use as sensitizers in dye-sensitized solar cells (DSSC). The nature of the EDG exerts a significant influence on the spectral, electrochemical and photovoltaic properties of these sensitizers. Absorption spectra of porphyrins having an amino group show broadened Soret band and red-shifted Q bands with respect to those of reference porphyrin YD0. This phenomenon is more pronounced for porphyrins YD7 and YD8 that have a pi-conjugated triphenylamine at the meso-position opposite the anchoring group. Upon introduction of an EDG at the meso-position, the potential for the first oxidation alters significantly to the negative whereas that for the first reduction changes inappreciably, indicating a decreased HOMO-LUMO gap. Results of density-functional theory (DFT) calculations support the spectroelectrochemical data for a delocalization of charge between the porphyrin ring and the amino group in the first oxidative state of diarylamino-substituted porphyrins YD1-YD4, which exhibit superior photovoltaic performance among all porphyrins under investigation. With long-chain alkyl groups on the diarylamino substituent, YD2 shows the best cell performance with J(SC) = 13.4 mA cm(-2), V(OC) = 0.71 V, and FF = 0.69, giving an overall efficiency 6.6% of power conversion under simulated one-sun AM1.5 illumination.
URI: http://hdl.handle.net/11536/6147
http://dx.doi.org/10.1039/b919645e
ISSN: 0959-9428
DOI: 10.1039/b919645e
期刊: JOURNAL OF MATERIALS CHEMISTRY
Volume: 20
Issue: 6
起始頁: 1127
結束頁: 1134
顯示於類別:期刊論文


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  1. 000273961900015.pdf