High-mobility band-like charge transport in a semiconducting two-dimensional metal–organic framework

  title={High-mobility band-like charge transport in a semiconducting two-dimensional metal–organic framework},
  author={Renhao Dong and Pengyu Han and Himani Arora and Marco Ballabio and Melike Karakus and Zhe Zhang and Chandra Shekhar and Peter Adler and Petko St. Petkov and Artur Erbe and Stefan C. B. Mannsfeld and Claudia Felser and Thomas Heine and Mischa Bonn and Xinliang Feng and Enrique C{\'a}novas},
  journal={Nature Materials},
Metal–organic frameworks (MOFs) are hybrid materials based on crystalline coordination polymers that consist of metal ions connected by organic ligands. In addition to the traditional applications in gas storage and separation or catalysis, the long-range crystalline order in MOFs, as well as the tunable coupling between the organic and inorganic constituents, has led to the recent development of electrically conductive MOFs as a new generation of electronic materials. However, to date, the… 

Outstanding Charge Mobility by Band Transport in Two-Dimensional Semiconducting Covalent Organic Frameworks

Two-dimensional covalent organic frameworks (2D COFs) represent a family of crystalline porous polymers with a long-range order and well-defined open nanochannels that hold great promise for

Room Temperature Metallic Conductivity in a Metal-Organic Framework Induced by Oxidation.

This study indicates two-dimensional MOFs can tolerate a substantial degree of doping that ultimately results in charge delocalization and metallic-like conductivity, an important step towards enabling their use in chemiresistive sensing and optoelectronics.

Band-like Transport of Charge Carriers in Oriented Two-Dimensional Conjugated Covalent Organic Frameworks

: A tunable topology and a porous network make π conjugated covalent organic frameworks (COFs) a new class of organic semiconductors for optoelectronic, smart sensing, and catalytic applications.

Metal-to-Semiconductor Transition in Two-Dimensional Metal-Organic Frameworks: An Ab Initio Dynamics Perspective.

The findings show how a structural change, which can be deformations along the layers, slipping of layers, or change of the interlayer distance, can induce metal- to-semiconductor or indirect-to-direct semiconductor transition, suggesting a way to adjust or even switch between the intralayer vs interlayer conductive anisotropy in Ni3(HITP)2, in particular, and 2D MOFs in general.

Large Single Crystals of Two-Dimensional π-Conjugated Metal–Organic Frameworks via Biphasic Solution-Solid Growth

This work develops a growth method that generates single-crystal plates with lateral dimensions exceeding 10 μm, orders of magnitude bigger than previous methods, allowing determination of the intrinsic conductivity and mobility along the 2D plane of πMOFs.

Unveiling Electronic Properties in Metal-Phthalocyanine-based Pyrazine-linked Conjugated Two-Dimensional Covalent Organic Frameworks.

A detailed characterization for the electronic properties of two novel samples consisting of Zn- and Cu-phthalocyanine-based pyrazine-linked 2D COFs is reported, finding charge carrier transport is found to be anisotropic, with hole mobilities being practically null in-plane and finite out-of-plane for these 2DCOFs.

2D Semiconducting Metal-Organic Framework Thin Films for Organic Spin Valves.

This work demonstrates the first potential applications of 2D c -MOFs in spintronics and can be retained with good film thickness adaptability varied from 30 to 100 nm and also at high temperatures (up to 200 K).

Interplay between Electronic, Magnetic, and Transport Properties in Metal Organic–Radical Frameworks

Development of modern electronic and spintronic technologies depends in large part on the ability to design materials exhibiting switchable magnetic and electrical properties. Here, motivated by the

Ultrathin two-dimensional conjugated metal–organic framework single-crystalline nanosheets enabled by surfactant-assisted synthesis†

HHB-Cu NSs deliver a remarkable rate capability (charge within 3 min) and long-term cycling stability (90% capacity retention after 1000 cycles), superior to the corresponding bulk materials and other reported MOF cathodes.

Dual-Ligand Porous Coordination Polymer Chemiresistor with Modulated Conductivity and Porosity.

A new 2D π-conjugated EC-MOFs containing mixed trigonal-liganded copper units was developed, providing the proper resistance baseline and highly accessible areas for the development of an excellent chemiresistive gas sensor.



A two-dimensional π–d conjugated coordination polymer with extremely high electrical conductivity and ambipolar transport behaviour

Four-probe measurements show that the room temperature conductivity of this material can reach up to 1,580 S cm−1, which is the highest value ever reported for coordination polymers, and it displays ambipolar charge transport behaviour and extremely high electron and hole mobilities under field-effect modulation.

Metallic Conductivity in a Two-Dimensional Cobalt Dithiolene Metal-Organic Framework.

These results identify the first experimentally observed MOF that exhibits band-like metallic conductivity, which is unprecedented in MOFs.

Tunable Electrical Conductivity in Metal-Organic Framework Thin-Film Devices

A strategy for realizing tunable electrical conductivity in metal-organic frameworks (MOFs) in which the nanopores are infiltrated with redox-active, conjugated guest molecules is reported.

Mobility engineering and a metal-insulator transition in monolayer MoS₂.

Electrical transport measurements on MoS₂ FETs in different dielectric configurations are reported, showing clear evidence of the strong suppression of charged-impurity scattering in dual-gate devices with a top-gate dielectrics and a weaker than expected temperature dependence.

Large-area, free-standing, two-dimensional supramolecular polymer single-layer sheets for highly efficient electrocatalytic hydrogen evolution.

A large-area and free-standing 2D supramolecular polymer single-layer sheet, comprising triphenylene-fused nickel bis(dithiolene) complexes has been readily prepared by using the Langmuir-Blodgett method, which exhibits excellent electrocatalytic activities for hydrogen generation from water and an overpotential superior to that of recently reported carbon nanotube supported molecular catalysts and heteroatom-doped graphene catalysts.

Electronic Conductivity, Ferrimagnetic Ordering, and Reductive Insertion Mediated by Organic Mixed-Valence in a Ferric Semiquinoid Metal-Organic Framework.

The transition metal-semiquinoid system is established as a particularly promising scaffold for achieving tunable long-range electronic communication in MOFs.

Redox control and high conductivity of nickel bis(dithiolene) complex π-nanosheet: a potential organic two-dimensional topological insulator.

This work provides a foothold for the development of the first organic-based two-dimensional topological insulator, which will require the precise control of the oxidation state in the single-layer nickel bisdithiolene complex nanosheet.

Electrically Conductive Porous Metal-Organic Frameworks.

This work reviews the synthetic and electronic design strategies that have been employed thus far for producing frameworks with permanent porosity and long-range charge transport properties and selected applications for this subclass of MOFs.

The Chemistry and Applications of Metal-Organic Frameworks

Metal-organic frameworks are porous materials that have potential for applications such as gas storage and separation, as well as catalysis, and methods are being developed for making nanocrystals and supercrystals of MOFs for their incorporation into devices.

Surface nano-architecture of a metal-organic framework.

It is expected that the versatility of the solution-based growth strategy presented here will allow the fabrication of various well-ordered MOF nanofilms, opening the way for their use in a range of important applications.