標題: Effects of Core-modification on Porphyrin Sensitizers to the Efficiencies of Dye-sensitized Solar Cells
作者: Mane, Sandeep B.
Luo, Liyang
Chang, Gao-Fong
Diau, Eric Wei-Guang
Hung, Chen-Hsiung
應用化學系
Department of Applied Chemistry
關鍵字: Core-modified porphyrins;Dye-sensitized solar cells;Photovoltaics
公開日期: 1-五月-2014
摘要: To study dye-sensitized solar cells (DSSCs) with core-modified porphyrins as the sensitizing dyes, three porphyrins with an ethynyl benzoic acid as an anchoring group are prepared. The properties of free-base regular porphyrin (N4), thiaporphyrin (N3S) and oxaporphyrin (N3O) were thoroughly studied by spectroscopic methods, DFT calculations, and photovoltaic measurements. Replacing one of the porphyrinic core nitrogen atoms by oxygen or sulfur considerably changes the absorption spectra. The Soret band of the N3O and N3S observed bathochromic shifts of 3-9 nm while the Q band reaches 700 nm to the near-infrared region. The overall conversion efficiencies of the DSSCs based on these porphyrins are in the order N4 (3.66%) >> N3S (0.22%) > N3O (0.01%). The time-correlated single photon counting observed short fluorescence lifetimes for N3O adsorbed both on TiO2 and Al2O3 which explicates the poor efficiency of DSSC using N3O as the photosensitizer.
URI: http://dx.doi.org/10.1002/jccs.201300525
http://hdl.handle.net/11536/24449
ISSN: 0009-4536
DOI: 10.1002/jccs.201300525
期刊: JOURNAL OF THE CHINESE CHEMICAL SOCIETY
Volume: 61
Issue: 5
起始頁: 545
結束頁: 555
顯示於類別:期刊論文


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  1. 000335825900007.pdf