Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

New low-bandgap polymetallaynes of platinum functionalized with a triphenylamine-benzothiadiazole donor–acceptor unit for solar cell applications

Language

English

Abstract

Two new solution-processable platinum-containing polymetallayne polymers functionalized with both triphenylamine and 2,1,3-benzothiadiazole groups were synthesized and characterized by thermal, spectroscopic and electrochemical methods. Their corresponding diplatinum model complexes were also prepared for comparison. The organometallic polymers exhibit good thermal stability and intense low-energy absorption bands in the visible region and both of them are fluorescent red-emitting materials. The effect of thiophene addition along the polymer chain on the optical, luminescent and photovoltaic properties of these metallated materials was also examined. Bulk heterojunction solar cells based on these polymers were studied and the low-bandgap polymers with internal donor-acceptor-donor π-conjugated fragment can serve as a good electron donor for fabricating photovoltaic devices by blending the polymer with a methanofullerene electron acceptor. At the same donor:acceptor blend ratio of 1:4, the light-harvesting ability and solar cell efficiency notably increase with the incorporation of additional thiophene rings in the polymer. The best power conversion efficiency of 1.61% was achieved with the open-circuit voltage of 0.77 V, short-circuit current density of 4.94 mA cm-2 and fill factor of 0.39 under illumination of an AM 1.5 solar cell simulator. © 2011 The Royal Society of Chemistry.

Publication Date

2011

Source Publication Title

Polymer Chemistry

Volume

2

Issue

2

Start Page

432

End Page

440

Publisher

Royal Society of Chemistry

DOI

10.1039/C0PY00273A

Link to Publisher's Edition

http://dx.doi.org/10.1039/C0PY00273A

ISSN (print)

17599954

ISSN (electronic)

17599962

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