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Conductivity in Thin Films of Transition Metal Coordination Complexes

Lookup NU author(s): Giovanni Spinelli, Harvey Morritt, Professor Mike ProbertORCiD, Dr Paul Waddell, Professor Marina FreitagORCiD

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

Abstract

© 2023 The Authors. Published by American Chemical Society. Two coordination complexes have been made by combining the dithiolene complexes [M(mnt)2]2- (mnt = maleonitriledithiolate; M = Ni2+ or Cu2+) as anion, with the copper(II) coordination complex [Cu(Stetra)] (Stetra = 6,6′-bis(4,5-dihydrothiazol-2-yl)-2,2′-bipyri-dine) as cation. The variation of the metal centers leads to a dramatic change in the conductivity of the materials, with the M = Cu2+ variant (Cu-Cu) displaying semiconductor behavior with a conductivity of approximately 2.5 × 10-8 S cm-1, while the M = Ni2+ variant (Ni-Cu) displayed no observable conductivity. Computational studies found Cu-Cu enables a minimization of reorganization energy losses and, as a result, a lower barrier to the charge transfer process, resulting in the reported higher conductivity.

Publication metadata

Author(s): Spinelli G, Morritt GH, Pavone M, Probert MR, Waddell PG, Edvinsson T, Munoz-Garcia AB, Freitag M

Publication type: Letter

Publication status: Published

Journal: ACS Applied Energy Materials

Year: 2023

Volume: 6

Issue: 4

Pages: 2122-2127

Print publication date: 27/02/2023

Online publication date: 06/02/2023

Acceptance date: 23/01/2023

ISSN (electronic): 2574-0962

Publisher: American Chemical Society

URL: https://doi.org/10.1021/acsaem.2c02999

DOI: 10.1021/acsaem.2c02999

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