標題: New Dual Donor-Acceptor (2D--2A) Porphyrin Sensitizers for Stable and Cost-Effective Dye-Sensitized Solar Cells
作者: Ambre, Ram B.
Chang, Gao-Fong
Zanwar, Manoj R.
Yao, Ching-Fa
Diau, Eric Wei-Guang
Hung, Chen-Hsiung
應用化學系
應用化學系分子科學碩博班
Department of Applied Chemistry
Institute of Molecular science
關鍵字: donor-acceptor systems;dyes;pigments;porphyrins;sensitizers;solar cells
公開日期: 1-九月-2013
摘要: A series of porphyrin sensitizers that featured two electron-donating groups and dual anchoring groups that were connected through a porphine -bridging unit have been synthesized and successfully applied in dye-sensitized solar cells (DSSCs). The presence of electron-donating groups had a significant influence on their spectroscopic, electrochemical, and photovoltaic properties. Overall, the dual anchoring groups gave tunable electronic properties and stronger attachment to TiO2. These new dyes were readily synthesized in a minimum number of steps in gram-scale quantities. Optical and electrochemical data confirmed the advantages of these dyes for use as sensitizers in DSSCs. Porphyrins with electron-donating amino moieties provided improved charge separation and better charge-injection efficiencies for the studied dual-push-pull dyes. Attenuated total reflectance-Fourier-transform infrared (ATR-FTIR) and X-ray photoelectron spectroscopy of the porphyrin dyes on TiO2 suggest that both p-carboxyphenyl groups are attached onto TiO2, thereby resulting in strong attachment. Among these dyes, cis-Zn2BC2A, with two electron-donating 3,6-ditertbutyl-phenyl-carbazole groups and dual-anchoring p-carboxyphenyl groups, showed the highest efficiency of 4.07%, with JSC=9.81mAcm-2, VOC=0.63V, and FF=66%. Our results also indicated a better photostability of the studied dual-anchored sensitizers compared to their mono-anchored analogues under identical conditions. These results provide insight into the developments of a new generation of high-efficiency and thermally stable porphyrin sensitizers.
URI: http://dx.doi.org/10.1002/asia.201300328
http://hdl.handle.net/11536/23035
ISSN: 1861-4728
DOI: 10.1002/asia.201300328
期刊: CHEMISTRY-AN ASIAN JOURNAL
Volume: 8
Issue: 9
起始頁: 2144
結束頁: 2153
顯示於類別:期刊論文


文件中的檔案:

  1. 000325928700027.pdf