Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Effect of oligothienyl chain length on tuning the solar cell performance in fluorene-based bolyplatinynes

Language

English

Abstract

A series of solution-processable and strongly visible-light absorbing polyplatinynes containing oligothienyl-fluorene ring hybrids were synthesized and characterized. These rigid-rod organometallic materials are soluble in polar organic solvents and show intense absorptions in the visible spectral region, rendering them excellent candidates for bulk heterojunction polymer solar cells. The photovoltaic behavior depends significantly on the number of thienyl rings along the polymer chain, and some of these polymer solar cells show high power conversion efficiencies (PCEs) of up to 2.9% and a peak external quantum efficiency to 83% under AM1.5 simulated solar illumination. The effect of oligothienyl chain length on improving the polymer solar cell efficiency and on their optical and charge transport properties is elucidated in detail. At the same blend ratio of 1:5, the light-harvesting capability and PCE increase markedly with increasing number of thienyl rings. The power dependencies of the solar cell parameters (including the short-circuit current density, open-circuit voltage, fill-factor, and PCE) were also examined. The present work opens up an attractive avenue to developing conjugated metallopolymers with broad and strong solar energy absorptions and tunable solar cell efficiency and supports the potential of metalated conjugated polymers for efficient power generation. © 2008 WILEY-VCH Verlag GmbH & Co. KGaA.

Publication Date

2008

Source Publication Title

Advanced Functional Materials

Volume

18

Issue

18

Start Page

2824

End Page

2833

Publisher

Wiley-VCH Verlag

DOI

10.1002/adfm.200800439

Link to Publisher's Edition

http://dx.doi.org/10.1002/adfm.200800439

ISSN (print)

1616301X

ISSN (electronic)

16163028

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