Department of Chemistry
Unsymmetric platinum(II) bis(aryleneethynylene) complexes as photosensitizers for dye-sensitized solar cells
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.
acetylide, dye-sensitized solar cells, photosensitizers, photovoltaics, platinum
Source Publication Title
Chemistry - An Asian Journal
Link to Publisher's Edition
Dai, F., Chen, Y., Lai, L., Wu, W., Cui, C., Tan, G., Wang, X., Lin, J., Tian, H., & Wong, W. (2012). Unsymmetric platinum(II) bis(aryleneethynylene) complexes as photosensitizers for dye-sensitized solar cells. Chemistry - An Asian Journal, 7 (6), 1426-1434. https://doi.org/10.1002/asia.201200027