Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/23827
Title: Platinum(II)-Bis(aryleneethynylene) complexes for solution-processible molecular bulk heterojunction solar cells
Authors: Dai, FR
Zhan, HM
Liu, Q
Fu, YY
Li, JH
Wang, QW
Xie, Z
Wang, L
Yan, F 
Wong, WY
Keywords: Organic photovoltaics
Organic solar cells
Platinum
Solution processing
Synthetic methods
Voltammetry
Issue Date: 2012
Publisher: Wiley-VCH
Source: Chemistry - a European journal, 2012, v. 18, no. 5, p. 1502-1511 How to cite?
Journal: Chemistry - a European journal 
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 solar-absorption 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-C71-butyric acid methyl ester (PC70BM) 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 p-channel field-effect charge transport with hole mobilities of up to 2.4 x 10(-4) cm(2) V-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.
URI: http://hdl.handle.net/10397/23827
ISSN: 0947-6539
EISSN: 1521-3765
DOI: 10.1002/chem.201102598
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