کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1336447 1500257 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cyclopentadithiophene-functionalized Ru(II)-bipyridine sensitizers for dye-sensitized solar cells
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Cyclopentadithiophene-functionalized Ru(II)-bipyridine sensitizers for dye-sensitized solar cells
چکیده انگلیسی

Two ruthenium sensitizers TT-230 and TT-232 based on cyclopenta[2,1-b:3,4-b′]dithiophene (CDT) were tested in dye-sensitized solar cells (DSSCs) using a tri-iodide/iodide redox couple, and their performances compared to the benchmark Z907. Both dyes of general formula Ru(LL′)(NCS)2 feature the same 4,4′-dicarboxylic acid 2,2′-bipyridine moiety acting as the anchoring group (L) to attach the dye on the TiO2 surface, and two CDT subunits as ancillary groups (L′) either directly-linked (TT-230) or vinylene-linked (TT-232) to the bipyridine moiety. In comparison with TT-230, the π-extended conjugation in TT-232 caused significant redshift and broadening of the absorption bands. However, despite better light-harvesting properties, the DSSC device sensitized with TT-232 strikingly underperformed compared to TT-230 under same conditions (PCE = 3.2% and 6.1%, respectively). The use of co-adsorbent (CHENO) or surfactants did not help to improve the photovoltaic properties of TT-230, and resulted in a degradation of the overall efficiency of the cell.

Two ruthenium sensitizers TT-230 and TT-232 based on cyclopenta[2,1-b:3,4-b']dithiophene (CDT) were tested in dye-sensitized solar cells (DSSCs) using a tri-iodide/iodide redox couple, and their performances compared to the benchmark Z907. Both dyes of general formula Ru(LL′)(NCS)2 feature the same 4,4′-dicarboxylic acid 2,2′-bipyridine moiety acting as the anchoring group (L ) to attach the dye on the TiO2 surface, and two CDT subunits as ancillary groups (L′) either directly-linked (TT-230) or vinylene-linked (TT-232) to the bipyridine moiety. In comparison with TT-230, the π-extended conjugation in TT-232 caused significant redshift and broadening of the absorption bands. However, despite better light-harvesting properties, the DSSC device sensitized with TT-232 strikingly underperformed compared to TT-230 under same conditions (PCE = 3.2% and 6.1%, respectively). The use of co-adsorbent (CHENO) or surfactants did not help to improve the photovoltaic properties of TT-230, and resulted in a degradation of the overall efficiency of the cell.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polyhedron - Volume 82, 4 November 2014, Pages 132–138
نویسندگان
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