Investigation of structural, morphological, electronic and photovoltaic properties of Co(II) complex with ligand
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Investigation of structural, morphological, electronic and photovoltaic properties of Co(II) complex with ligand D. Kilinc1 · O. Sahin2 · S. Horoz3 Received: 20 February 2018 / Accepted: 29 March 2018 © Springer Science+Business Media, LLC, part of Springer Nature 2018
Abstract The dye sensitized solar cells (DSSCs) used as an alternative to inorganic semiconductor sensitized solar cells (ISSCs), have favorable ecological and economical properties. In our current study, Co(II) complex with 4,4′-methylene bis (2,6-diethyl) aniline-3,5-di-tert-butylsalicylaldimine ligand was used as a sensitizer in DSSC by growing on TiO2 coated on FTO conductive glass substrate. Current density (J) versus voltage (V) measurement was applied to investigate the photovoltaic properties of the synthesized Co(II) complex with ligand. The calculated power conversion efficiency (η%) of the complex using the obtained current density (J) versus voltage (V) curve shows that this device can be used as a promising sensitizer in solar cell application. Furthermore, structural, morphological and electronic properties of Co(II) complex with ligand were characterized by x-ray diffraction, Fourier transform-infrared spectroscopy, scanning electron microscopy and electronic absorption measurements, respectively.
1 Introduction Schiff-base ligands and their metal complexes, one of the most important materials used in many different applications, have been of great interest for many years. These complexes provide a significant contribution to the development of areas such as magnetism, catalysis, material chemistry [1–3]. In addition, complexes are used as a dye or sensitizer in dye-sensitized solar cells (DSSCs), one of the photovoltaic applications, since they have properties such as absorbing visible radiation and providing charge transfer transitions [4, 5]. DSSCs used to convert visible light into electricity have recently been spreading technologically in a wide range of potential applications. A DSSC structure contains four important components. These; (1) an electrode coated with a sensitizer that absorbs solar energy used as a source, (2) a * S. Horoz [email protected] 1
Department of Chemistry, Faculty of Arts & Sciences, Siirt University, 56100 Siirt, Turkey
2
Department of Chemical Engineering, Faculty of Engineering and Architecture, Siirt University, 56100 Siirt, Turkey
3
Department of Electrical and Electronic Engineering, Faculty of Engineering and Architecture, Siirt University, 56100 Siirt, Turkey
transparent conductive oxide layer providing charge transfer from the electrode, (3) a counter electrode which returns the charge from the external circuit to the main circuit in the cell, (4) redox electrolyte layer that minimizes undesirable energy caused by sensitizer. When any one of these four components is changed, the performance of a DSSC structure can be altered accordingly [6–9]. Sensitizers that convert incoming energy to electricity by absorpting the light from the solar energy used as a source have an eff
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