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Thermionic generators are claimed, the 1, 000 ° K to 400° K at
emitter temperaturescollector temperatures
to have high efficiencies and solar energy and for converting into electricity can be used. 2.5 to 3.5 eV
[...]emitter materials
with work function of consist of The antimonides of rare earth metals or yttrium or metallic yttrium or titanium carbide or, or the
[...]
of rare earth metals or the
[...]
,
[...][...]
or rare earth metal. The
collector materials
with extremely low work function consist of aluminides,
[...]
,
[...]
,
[...]
of rare earth metals or alkali metals or alkaline earth metals or of alkaline earth metals or rare earth metals from
[...]
. As emitters in the thermionic cooling you can also, in inorganic or organic light emitting diodes, guns,
low-light enhancers
or
[...]
be used.