Cyclopentadithiophene-functionalized Ru(II)-bipyridine sensitizers for dye-sensitized solar cells

被引：2

作者：

Urbani, Maxence ^{[1
,3
]}

Medel, Maria ^{[1
]}

Kumar, Sangeeta Amit ^{[2
]}

Chandiran, Aravind Kumar ^{[2
]}

Gonzalez-Rodriguez, David ^{[1
]}

Graetzel, Michael ^{[2
]}

Nazeeruddin, Mohammad Khaja ^{[2
]}

Torres, Tomas ^{[1
,3
]}

机构：

[1] Univ Autonoma Madrid, Dept Quim Organ, E-28049 Madrid, Spain

[2] Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, Inst Chem Sci & Engn, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland

[3] Inst Madrileno Estudios Avanzados IMDEA Nanocienc, Madrid 28049, Spain

来源：

POLYHEDRON | 2014年 / 82卷

关键词：

Dye-sensitized solar cells; Ruthenium dyes; Cyclopentadithiophene; Heteroleptic Ru(II) complex; Photovoltaic; FIELD-EFFECT TRANSISTORS; OPEN-CIRCUIT VOLTAGE; RUTHENIUM SENSITIZERS; PERFORMANCE; POLYMER; EFFICIENCY; BENZOTHIADIAZOLE; ELECTROLYTE; COPOLYMERS; LEVEL;

D O I：

10.1016/j.poly.2014.05.045

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

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 (11-230) or vinylene-linked (TT-232) to the bipyridine moiety. In comparison with TT-230, the it-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. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：132 / 138

页数：7

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