Onset voltage

The desctiption of SF electtical properties needed for practical appHcations is more complex than knowledge of BDV. Corona-onset voltages (COV) must be considered, particularly for the more usual nonuniform fields. Figure 2 illustrates this for a point-to-plane electrode configuration, where extensive prebreakdown corona occurs before sparkover (36). 

Table 1. Electrospray Onset Voltages for Solvents with Different Surface Tensions, y...

Device Structure Onset Voltage Luminance Efficiency Xmax... 

Thus the onset voltage, or the retarding potential, of the ion energy... 

The cyclic voltammograms of these soluble assemblies show a behavior similar to that previously observed by Prato et al.121, that is, a continuum of cathodic current with the reduction onset voltage of —0.15 V versus SCE. Recently, Paolucci et al. were able to obtain the electrochemistry of reduced unfunctionalized carbon nanotubes that were solubilized by reduction with alkali metals to their respective polyelectrolyte salts.122... 

A single-layer OLED with [Er(acac)3phen] doped into a 80-nm thick film of PVK (see fig. 117) prepared by spin-coating and deposited on an ITO electrode, and with a 100-nm lithium-doped (0.1%) aluminum cathode has also been tested and shows an onset voltage of about 12 V for electroluminescence (Sun et al., 2000). [Er(dbm)3bath] has a photoluminescence quantum yield of 0.007% in dmso-7fl at 1 mM concentration the OLED based on this compound and similar to the one described above for Ndm has a NIR external electroluminescence efficiency of 1 x 10-6 (Kawamura et al., 2001). 

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