標題: | Toward Optimization of Oligothiophene Antennas: New Ruthenium Sensitizers with Excellent Performance for Dye-Sensitized Solar Cells |
作者: | Yin, Jen-Fu Chen, Jian-Ging Lu, Zong-Zhan Ho, Kuo-Chuan Lin, Hong-Cheu Lu, Kuang-Lieh 材料科學與工程學系 Department of Materials Science and Engineering |
公開日期: | 10-八月-2010 |
摘要: | This paper reports on the design and synthesis of three new ruthenium sensitizers, as well as the optimization of their linear or dendritic light-harvesting oligothiophene antennas to achieve superior device performance. The three new ruthenium sensitizers, [Ru(dcbpy)(obtip)(NCS)(2)] (JF-5, dcbpy = 4,4'-dicarboxylic obtip = 2-(5-octyl-(2,2'-bithiophen)-5'-yl)-1H-imidazo[4,51][1,10]-phenanthroline), [Ru(dcbpy)(ottip)(NCS)(2)] (JF-6, ottip = 2-(5-octyl-2,2',5',2 ''-terthiophen)-5 ''-yl)-1H-imidazo[4,5-f][1,10]-phenanthroline), and [Ru(dcbpy)(dottip)(NCS)(2)] (JF-7, dottip = di-(5-octylthiophen-2-ypthiophen-5-yl)-1H-imidazo[4,5-f][1,10]phenanthroline), were synthesized in a typical one-pot reaction. The ruthenium sensitizer JF-5 incorporating a linear and planar 2,2'-bithiophene antenna showed the best DSCs performance (9.5%; compared to N3, 8.8%). The difference in the performance of these sensitizers demonstrates that elongating the linear and planar light-harvesting antenna result in an enhancement in MLCT intensity, but a reduction in the quantity of dye-loading. This finding not only permitted the power-conversion efficiency in ruthenium sensitizers containing oligothiophene antennas to be optimized, but also points to a promising direction for molecule engineering in DSCs. |
URI: | http://dx.doi.org/10.1021/cm100770x http://hdl.handle.net/11536/32303 |
ISSN: | 0897-4756 |
DOI: | 10.1021/cm100770x |
期刊: | CHEMISTRY OF MATERIALS |
Volume: | 22 |
Issue: | 15 |
起始頁: | 4392 |
結束頁: | 4399 |
顯示於類別: | 期刊論文 |