Electrochemical Deposition and Thermoelectric Characterisation of a Semiconducting 2-D Metal-Organic Framework Thin Film

Abstract

The electrical conductivity and porosity of the 2-dimensional metal-organic framework Cu<sub>3</sub>(2,3,6,7,10,11-hexahydroxytriphenylene)<sub>2</sub> [Cu<sub>3</sub>(HHTP)<sub>2</sub>] make it a promising candidate for thermoelectric applications. In this work, we report the electrochemical synthesis of Cu<sub>3</sub>(HHTP)<sub>2</sub> films by an anodization approach and an evaluation of its thermoelectric properties. The electrochemically synthesised Cu<sub>3</sub>(HHTP)<sub>2</sub> thin films were transferred using a wet chemical method in order to perform electrical measurements. We are reporting the first thermoelectric measurements of this framework both in bulk and thin film form which resulted in Seebeck coefficients of -7.24 µV/K and -121.4 µV/K with a power factor of 3.15x10<sup>-3</sup> µW m<sup>-1</sup> for the film respectively. The negative Seebeck coefficients suggest that Cu<sub>3</sub>(HHTP)<sub>2</sub> behaves as an n-type semiconductor.

Porous framework-based hybrid materials for solar-to-chemical energy conversion: from powder photocatalysts to photoelectrodes

“…Their method was further extended to the synthesis of various MOF thin films, such as the Cu3(HHTP) 2 MOF composed of Cu and 2,3,6,7,10,11-hexadroxytriphenylene (HHTP) for optoelectronic application. 231 However, there have been no reports on the preparation of MOF and COF photoelectrodes by electrodeposition methods for solar-to-chemical energy conversion. Electrophoretic deposition is based on the movement of charged precursors in the presence of an external electric field.…”

Synthesis and Characterization of Ru-MOFs on Microelectrode for Trace Mercury Detection

“…As an alternative, the cathode synthesis method can directly deposit MOFs on the electrode surface. Compared with traditional hydrothermal synthesis, the cathode method has short synthesis time and mild conditions [ 39 , 40 , 41 , 42 , 43 ], and can directly synthesize MOFs on the electrode. For the cathode synthesized MOFs, its lattice structure is prone to defect and it contains unsaturated metal centers, which improves the conductivity of the material.…”