From n- to p-Type Material: Effect of Metal Ion on Charge Transport in Metal–Organic Materials
| Autor: | Vitalie Stavila, Monica C. So, Yuping He, A. Alec Talin, Austin M. Mroz, Thomas D. Bennett, David A. Keen, Christopher H. Hendon, Mark D. Allendorf, Sungwon Yoon |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Dopant Nanoporous Charge (physics) 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Amorphous solid Metal Electrical resistivity and conductivity Chemical physics visual_art visual_art.visual_art_medium General Materials Science Metal-organic framework Charge carrier 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 13:52055-52062 |
| ISSN: | 1944-8252 1944-8244 |
| Popis: | An intriguing new class of two-dimensional (2D) materials based on metal-organic frameworks (MOFs) has recently been developed that displays electrical conductivity, a rarity among these nanoporous materials. The emergence of conducting MOFs raises questions about their fundamental electronic properties, but few studies exist in this regard. Here, we present an integrated theory and experimental investigation to probe the effects of metal substitution on the charge transport properties of M-HITP, where M = Ni or Pt and HITP = 2,3,6,7,10,11-hexaiminotriphenylene. The results show that the identity of the M-HITP majority charge carrier can be changed without intentional introduction of electronically active dopants. We observe that the selection of the metal ion substantially affects charge transport. Using the known structure, Ni-HITP, we synthesized a new amorphous material, a-Pt-HITP, which although amorphous is nevertheless found to be porous upon desolvation. Importantly, this new material exhibits p-type charge transport behavior, unlike Ni-HITP, which displays n-type charge transport. These results demonstrate that both p- and n-type materials can be achieved within the same MOF topology through appropriate choice of the metal ion. |
| Databáze: | OpenAIRE |
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