The structure, optical properties and photovoltaic effect in Langmuir-Schaefer films of nickel (II) bis-semiquinone complex derived from 3,6-di‑tert‑butyl‑benzoquinone annulated with a 1,3 -dithiole-2-thiocarbonyl fragment

Abstract

Molecules with an extended conjugated π-electron system and a flat rigid topology have traditionally been considered as appropriate candidates for organic (semi-)conductors. With their potential for intramolecular charge transfer, these molecules can have bright prospects in optoelectronic device manufacturing. In this work we describe a novel bis-semiquinone complex of nickel and о-quinone annulated with a 1,3-dithiol-2-thiocarbonyl fragment and the peculiarities of thin-film deposition of this compound on different substrates. It is shown that a thin film can maintain the crystal structure of the original complex. A photovoltaic effect is detected in sandwich structures with an aluminum cathode. It is anticipated that further optimization of the structure of such sulfur-rich molecules will prodive solid-state ensembles with promising photovoltaic and/or photodetecting properties.