The metal organic framework material Ni-3(2,3,6,7,10,11-hexaiminotriphenylene)(2) (Ni-3(HITP)(2)) is composed of layers of extended conjugated planes analogous to graphene. We carried out density functional theory (DFT) calculations to model the electronic structure of monolayer, bilayer, and bulk Ni-3(HITP)(2). These materials have intriguing electronic properties; for example, appreciable band dispersion is predicted not only in plane but also perpendicular to the stacking planes. This suggests that, unlike graphene, the material may have appreciable conductivity in all crystallographic directions. Moreover, the bulk and bilayer structures are predicted to be metallic; in contrast, a 2D monolayer of the material exhibits a band gap. Insight obtained from studies of the transition of the material from semiconducting to metallic as the dimensionality increases from 2D to 3D suggests the possibility of producing a 3D semiconducting material by inserting spacer moieties between the layers. Our calculations suggest that it is not energetically favorable for Ni-3(HITP)(2) to accept a spacer linker (i.e., pyridine); however, changing the coordinating metal to Cr makes spacer insertion energetically favorable. The proposed 3D material is predicted to possess a band gap of similar to 1 eV with electron/hole effective masses similar to that of silicon.
Proposed Modification of the Graphene Analogue Ni-3(HITP)(2) To Yield a Semiconducting Material
Creators
Michael E. Foster - Sandia National Laboratories California
Karl Sohlberg - Drexel University
Catalin D. Spataru - Sandia National Laboratories California
Mark D. Allendorf - Sandia National Laboratories California
Publication Details
Journal of physical chemistry. C, v 120(27), pp 15001-15008
Publisher
American Chemical Society; Washington, DC
Number of pages
8
Grant note
DE-EE0000990-1634 / U.S. Department of Energy Office of Energy Efficiency and Renewable Energy SunShot Program; United States Department of Energy (DOE)
DE-AC04-94AL85000 / U.S. Department of Energy's National Nuclear Security Administration; National Nuclear Security Administration
Resource Type
Journal article
Language
English
Academic Unit
Chemistry
Web of Science ID
WOS:000379990400060
Scopus ID
2-s2.0-84978636424
Other Identifier
991019168184104721
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