Issue 38, 2017

Double D–π–A branched dyes – a new class of metal-free organic dyes for efficient dye-sensitized solar cells

Abstract

Double branched donor acceptor compounds (D–π–A)2L, whose separate branches are linked by saturated chains or ring systems, are highly promising sensitizers for dye-sensitized solar cells (DSSCs). Their photovoltaic performance η (power conversion efficiency PCE) is higher than the η value of the corresponding single branched sensitizers D–π–A. This advantage can be attributed to the lower aggregation tendency and to the higher loading density of the chromophores on the semi-conductor surface (TiO2). Moreover, the intramolecular transfer of the excitation energy can enhance the contact time of the adsorbed dye molecules in the excited state S1 and thus reduce the unwanted charge recombination (dark current).

Graphical abstract: Double D–π–A branched dyes – a new class of metal-free organic dyes for efficient dye-sensitized solar cells

Article information

Article type
Review Article
Submitted
29 iyl 2017
Accepted
11 sen 2017
First published
12 sen 2017

J. Mater. Chem. C, 2017,5, 9828-9837

Double D–π–A branched dyes – a new class of metal-free organic dyes for efficient dye-sensitized solar cells

H. Meier, Z. Huang and D. Cao, J. Mater. Chem. C, 2017, 5, 9828 DOI: 10.1039/C7TC03406G

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