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RISS 인기검색어
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- 저자 : AlKerm, Rana S. (검색결과 1 건)
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Zyoud, Ahed,AlKerm, Rana S.,Alkerm, Rola S.,Abdelhadi, Doa׳,H.,Park, DaeHoon,Helal, Mohammed H.S.,Campet, Guy,Muthaffar, Reham W.,Kwon, Hansang,Hilal, Hikmat S. North-Holland 2016 Solar Energy Materials and Solar Cells Vol. No.
<P><B>Abstract</B></P> <P>High conversion efficiency (<I>η</I>) values have been obtained from modified CuS film electrodes electrochemically deposited onto Glass/FTO. The modification involved pre-annealing the film followed by coating with tetra(-4-pyridyl)porphyrinato manganese (MnTPyP<SUP>+</SUP>) ions embedded inside a polyethylene (PE) matrix. The Glass/FTO/CuS/MnTPyP/PE electrodes exhibited enhanced photo-electrochemical (PEC) characteristics under solar simulated illumination (5.6mW/cm<SUP>−2</SUP>) in aqueous media, compared to the as-prepared Glass/FTO/CuS films which showed no PEC activity. Up to 17.4% efficiency and 85% fill factor (FF) values were obtained from the modified film electrodes. Such characteristics have not been widely known for metal chalcogenide based film electrodes before. Different pre-annealing temperatures were attempted and the 250°C temperature, followed by quenching, showed favorable results. Different aqueous redox couples were studied and the environmentally safe FeCl<SUB>2</SUB>/FeCl<SUB>3</SUB> aqueous system showed highest PEC characteristics. Effect of pre-annealing on film electrode characteristics is discussed. The MnTPyP/PE matrix behaves as charge transfer catalyst for the holes across the CuS film/liquid junction.</P> <P><B>Highlights</B></P> <P> <UL> <LI> CuS film electrodes were coated with metalloporphyrinato manganese(III)/polyethylene matrices. </LI> <LI> High PEC characteristics have been exhibited by the modified electrodes. </LI> <LI> Modification enhanced both film electrode stability and efficiency together. </LI> <LI> The matrix behaved as charge transfer catalyst for holes at the solid/liquid interface. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Annealing CuS film electrodes at moderate temperatures (preferably at 250°C) affects CuS film morphology and spectral properties, and coating with metalloporphyrin/polymer matrices enhanced their PEC efficiency and stability.</P> <P>[DISPLAY OMISSION]</P>
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