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The SI unit of electrical conductivity is siemens per metre (S/m). Resistivity and conductivity are intensive properties of materials, giving the opposition of a standard cube of material to current. Electrical resistance and conductance are corresponding extensive properties that give the opposition of a specific object to electric current.
Transparent conducting films are typically used as electrodes when a situation calls for low resistance electrical contacts without blocking light (e.g. LEDs, photovoltaics). Transparent materials possess wide bandgaps whose energy value is greater than those of visible light. As such, photons with energies below the bandgap value are not ...
where is the length of the conductor, measured in metres [m], A is the cross-section area of the conductor measured in square metres [m 2], σ is the electrical conductivity measured in siemens per meter (S·m −1), and ρ is the electrical resistivity (also called specific electrical resistance) of the material, measured in ohm-metres (Ω·m ...
Although typically "doping" conductive polymers involves oxidizing or reducing the material, conductive organic polymers associated with a protic solvent may also be "self-doped." Undoped conjugated polymers are semiconductors or insulators. In such compounds, the energy gap can be > 2 eV, which is too great for thermally activated conduction.
Organic conductive materials can be grouped into two main classes: polymers and conductive molecular solids and salts. Polycyclic aromatic compounds such as pentacene and rubrene often form semiconducting materials when partially oxidized. Conductive polymers are often typically intrinsically conductive or at least semiconductors. They ...
The TPRC List is the TPRC estimate for well annealed Lead of 99.99+% purity and residual electrical resistivity ρ 0 =0.000880 μΩ cm. TPRC Data Series Volume 1, page 191. [8] This material is superconductive (electrical) at temperatures below 7.193 Kelvins. Weast page E-87. [27] Limestone: 1.26 [19] - 1.33 [19] Indiana Limestone R 1.19 1.21 1 ...
A compound semiconductor is a semiconductor compound composed of chemical elements of at least two different species. These semiconductors form for example in periodic table groups 13–15 (old groups III–V), for example of elements from the Boron group (old group III, boron, aluminium, gallium, indium) and from group 15 (old group V, nitrogen, phosphorus, arsenic, antimony, bismuth).
Metal ions and organic linker self-assemble to form a framework which can be 1D/2D/3D [clarification needed] in connectivity. The first conductive MOF, Cu[Cu(2,3-pyrazinedithiol) 2] was described in 2009 and exhibited electrical conductivity of 6 × 10 −4 S cm −1 at 300 K. [1] Fig.1 Typical multi-dentate ligands for synthesis of conductive ...