Multi-Branched Multi-Anchoring Metal-Free Dyes for Dye-Sensitized Solar Cells

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作   者：

Manfredi, Norberto;  Cecconi, Bianca;  Abbotto, Alessandro; 

作者机构：

INSTM Unit;  I-20125 Milan;  Univ Milano Bicocca;  Dept Mat Sci;  Italy; 

关键词：

Solar cells;  Dyes;  Energy conversion;  Pigments;  Sensitizers;  Photochemistry; 

期刊名称：

European journal of organic chemistry

i s s n：

1434-193X

年卷期：

2014 年 32 期

页   码：

7069-7086

页   码：

摘   要：

Multi-branched multi-anchoring metal-free dyes as photo-sensitizers for dye-sensitized solar cells (DSSCs) are reviewed. The article outlines design strategies, main synthetic routes and optical and photovoltaic properties of two families of multi-branched sensitizers: (a) D-(pi-A)(n) (D = donor, pi = pi-spacer, A = acceptor/anchoring functionality) structures containing arylamine, carbazole, phenothiazine or phenoxazine derivatives as D groups, and (b) multi-donor multi-anchoring architectures from interconnected mono-branched D-pi-A arms, together with X- and Y-shaped dyes. Although this class has been reported only in the last five years, a variety of molecular architectures, donors, and pi-spacers have been used and combined in multi-branched molecules. The multi-branched geometry induces distinctive features including enhanced qualitative and quantitative optical properties, increased currents and quantum efficiencies, and control of molecular aggregation.