Insight into charge transportation in cadmium based semiconducting organic-inorganic hybrid materials and their application in the fabrication of photosensitive Schottky devices

Roy, S and Dey, A and Gomila, RM and Ortega-Castro, J and Frontera, A and Ray, PP and Chattopadhyay, S (2022) Insight into charge transportation in cadmium based semiconducting organic-inorganic hybrid materials and their application in the fabrication of photosensitive Schottky devices. In: Dalton Transactions, 51 (14). pp. 5721-5734.

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Abstract

A coordination polymer (1) and a trinuclear complex (2) have been synthesized using a compartmental N2O2O2' donor Schiff base ligand. Both complexes are characterized using different spectroscopic techniques and their structures are determined using single crystal X-ray diffraction analyses. Energies associated with different non-covalent (S⋯O chalcogen bonds, C-H⋯H-C, C-H⋯I and C-H⋯π)interactions in the solid state of both complexes have been calculated using the Turbomole program. Investigations of electrical conductivity and photosensitivity of both complexes reveal that suitable Schottky diode devices could be fabricated from both complexes. The current vs. voltage plots of the complex based devices have been used to calculate the conductivity under dark and irradiation conditions. In both complexes the charge transportation mainly occurs through space which involves the hopping process. Standard band theory has been used to compare the experimental and theoretical results of optoelectronic measurements. The calculations confirm that both are direct band gap (2.78 and 3.30 eV) semiconductors and that complex 1 exhibits a lower band gap, in line with the experimental results (3.21 and 3.43 eV in 1 and 2, respectively).

Item Type:	Journal Article
Publication:	Dalton Transactions
Publisher:	Royal Society of Chemistry
Additional Information:	The copyright for this article belongs to Royal Society of Chemistry
Keywords:	C (programming language); Coordination reactions; Energy gap; Fabrication; Light sensitive materials; organic-inorganic materials; Single crystals; X ray diffraction analysis, Charge transportation; Coordination Polymers; Coordination-polymers; Noncovalent; Organic-inorganic hybrid materials; Schiff-base ligands; Schottky devices; Spectroscopic technique; Synthesised; Trinuclear complex, Photosensitivity
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	18 May 2022 07:09
Last Modified:	18 May 2022 07:09
URI:	https://eprints.iisc.ac.in/id/eprint/71825

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