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One of the conceptually simplest ways of conversion of solar energy to electricity is based on thermionic emission. This process can occur in carbon nanotube forests through the Heat Trap effect, whereby a small amount of focused light results in unusually localized and thus extremely efficient heating. Here, we exploit this phenomenon to build a new generation of simple and compact solar thermionic...
It has been shown that cold field emission can be an important electron source in microscale discharges. However, if the cathode is heated to a high temperature, thermal emission is initiated, which impacts microscale discharge formation. In both cold and thermal conditions, ionization in the discharge can create sufficient space charge to impact the emission current. In this work, we use a two-fluid...
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