Spin-Polarized Transport and Optoelectronic Properties of a Novel-Designed Architecture with a Porphyrin-Based Wheel and
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https://doi.org/10.1007/s11837-020-04153-0 Ó 2020 The Minerals, Metals & Materials Society
QUANTUM MATERIALS FOR ENERGY-EFFICIENT COMPUTING
Spin-Polarized Transport and Optoelectronic Properties of a Novel-Designed Architecture with a Porphyrin-Based Wheel and Organometallic Multidecker Sandwich Complex-Based Axle SHENGNAN GAO,1 ZHAODI YANG,1 YUXIU WANG,1 GUILING ZHANG,1,2 and YANGYANG HU1 1.—School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150080, China. 2.—e-mail: [email protected]
A novel ‘‘wheel-and-axle’’ architecture (c-P6)m/(FeBz)n, with (c-P6) denoting the wheel formed by six porphyrin-based segments and (FeBz)n the axle formed by the 1D iron benzene multidecker complex, is designed, and its electronic structure, transport property, and linear photoresponse are investigated. (c-P6)m/(FeBz)n shows a spin-polarized transport property. The spin filter efficiency of (c-P6)m/(FeBz)n can be > 90%, suggesting it is a very good candidate for spin filters. Furthermore, a distinct NDR feature is observed for (c-P6)m/(FeBz)n so it is can be used for making electronic switches and oscillators. Under linear light, both the wheel and axle of (c-P6)m/(FeBz)n exhibit a distinct polarized photoresponse character. The magnitude of the photoresponse can be tuned by the photon energy or by the l bias voltage. An off–on– off switch is observed within the considered photon energy range, showing potential application for optical switches. All these fascinating properties of (cP6)m/(FeBz)n make the new 1D material especially attractive for electronic and optoelectronic devices.
INTRODUCTION Multiporphyrin supramoleculars consist of one of the most important and versatile classes of pconjugated systems and have found potential applications in diverse fields such as optical switches, conductive materials, and nonlinear optics.1–10 Among them, nanosized fully p-conjugated macrocycles based on porphyrin units are of particular interest for the preparation of next-generation electronic and optoelectronic devices and are poised to become key components of the revolution in microelectronics and nanotechnology.11–16 To facilitate description, such porphyrin-based macrocycles are denoted as c-Pm on the basis of the porphyrin number m. A promising approach has been developed to synthesis such macrocycles using templatedirected self-assembly,12,13 which was initially used to form a nanoring containing eight butadienelinked porphyrin units (termed c-P8).17,18 Following this success, systematic modifications to the templates has led to the synthesis of a wide range of porphyrin-based macrocycles, with rings in the
range of c-P5 to c-P50 becoming available.19–22 These macrocyclics are very interesting compounds as they connect to a free terminus of a p-system with a definite size and shape.18,19,23–33 Due to the lack of end-group effects, high rotational symmetry, and ring tension, the cyclic molecule exhibits fundamentally different electrodynamic properties from the corresponding linear m
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