http://dx.doi.org/10.1002/chem.201102598">
 

Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Platinum(II)–bis(aryleneethynylene) complexes for solution-processible molecular bulk heterojunction solar cells

Language

English

Abstract

Four new solution-processible small-molecular platinum(II)-bis( aryleneethynylene) complexes consisting of benzothiadiazole as the electron acceptor and triphenylamine and/ or thiophene as the electron donor were conveniently synthesized and characterized by physicochemical and computational methods, and utilized as the electron-donor materials in the fabrication of solution-processed bulk heterojunction (BHJ) solar cells. The effect of different electron-donor groups in these small molecules on the optoelectronic and photovoltaic properties was also examined. The optical and time-dependent density functional theory studies showed that the incorporation of stronger electron-donor groups significantly enhanced the solarabsorption abilities of the complexes. These molecular complexes can serve as good electron donors for fabricating BHJ devices by blending them with the [6,6]-phenyl-C 71-butyric acid methyl ester (PC 70BM) as the electron acceptor. The best power conversion efficiency of 2.37% was achieved with the open-circuit voltage of 0.83 V, short-circuit current density of 7.10 mAcm -2 and fill factor of 0.40 under illumination of an AM 1.5 solar-cell simulator. The spin-coated thin films showed pchannel field-effect charge transport with hole mobilities of up to 2.4× 10 -4 cm 2V -1 s -1 for these molecules. The present work illuminates the potential of well-defined organometallic complexes in developing light-harvesting small molecules for efficient power generation in organic photovoltaics implementation. © 2012 Wiley-VCH Verlag GmbH&Co. KGaA, Weinheim.

Keywords

Organic photovoltaics, Organic solar cells, Platinum, Solution processing, Synthetic methods, Voltammetry

Publication Date

2012

Source Publication Title

Chemistry - A European Journal

Volume

18

Issue

5

Start Page

1502

End Page

1511

Publisher

Wiley-VCH Verlag

ISSN (print)

09476539

ISSN (electronic)

15213765

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