Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Unsymmetric platinum(II) bis(aryleneethynylene) complexes as photosensitizers for dye-sensitized solar cells

Language

English

Abstract

Four new unsymmetric platinum(II) bis(aryleneethynylene) derivatives have been designed and synthesized, which showed good light-harvesting capabilities for application as photosensitizers in dye-sensitized solar cells (DSSCs). The absorption, electrochemical, time-dependent density functional theory (TD-DFT), impedance spectroscopic, and photovoltaic properties of these platinum(II)-based sensitizers have been fully characterized. The optical and TD-DFT studies show that the incorporation of a strongly electron-donating group significantly enhances the absorption abilities of the complexes. The maximum absorption wavelength of these four organometallic dyes can be tuned by various structural modifications of the triphenylamine and/or thiophene electron donor, improving the light absorption range up to 650nm. The photovoltaic performance of these dyes as photosensitizers in mesoporous TiO 2 solar cells was investigated, and a power conversion efficiency as high as 1.57% was achieved, with an open-circuit voltage of 0.59 V, short-circuit current density of 3.63 mA cm -2, and fill factor of 0.73 under simulated AM 1.5G solar illumination. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords

acetylide, dye-sensitized solar cells, photosensitizers, photovoltaics, platinum

Publication Date

2012

Source Publication Title

Chemistry - An Asian Journal

Volume

7

Issue

6

Start Page

1426

End Page

1434

Publisher

Wiley-VCH Verlag

DOI

10.1002/asia.201200027

Link to Publisher's Edition

http://dx.doi.org/10.1002/asia.201200027

ISSN (print)

18614728

ISSN (electronic)

1861471X

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