thermionic emission

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Related to Richardson constant: thermionic current, thermionic work function

thermionic emission

n
(Electronics) the emission of electrons from very hot solids or liquids: used for producing electrons in valves, electron microscopes, X-ray tubes, etc
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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Noun1.thermionic emission - the emission of electrons from very hot substances
emission - the release of electrons from parent atoms
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References in periodicals archive ?
where [I.sub.0] is the saturation current; S is metal-semiconductor contact area; A is Richardson constant; k is Boltzmann constant.
The Richardson constant is usually assumed to be 120 A [cm.sup.-2] [K.sup.-2], but in [31] it is indicated that the experimental values of A may not coincide with the given value.
where [E.sub.m] = [square root of ((2q[N.sub.D]/[[epsilon]'.sub.S])([V.sub.n] + [[phi].sub.B] + (kT/q) + V))], [A.sup.*] = 9.6 A/k-[cm.sup.2], A [approximately equal to] 8 x [10.sup.-4] [cm.sup.2], T = 300 K, q = 1.6 x [10.sup.-19] C, k = 1.38 x [10.sup.-23] J/K, [[phi].sub.B] = 0.83 eV, [N.sub.d] = 8 x [10.sup.16] [cm.sup.-3], 4 = 10.8, [[epsilon].sub.S] = 12.9, [V.sub.n] = 0.05 V, and V = 0 V to 5 V are the maximal electric field, the Richardson constant, contact area, absolute temperature, unit electronic charge, Boltzmann constant, barrier height, doping concentration, permittivity of GaAs near the Pd, permittivity of GaAs, Fermi potential from conduction-band edge, and applied voltage, respectively.

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