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Hyperspectroscopy consists of spatially-resolved collection of spectra. In order to characterize the performance of electron emitters, in particular thermionic emitters, the thermal characteristics must be known. In this work, we use hyperspectroscopy to map out the blackbody temperature distribution on the surface of an optically-excited source comprised of a carbon nanotube (CNT) forest — a promising...
Thermionic conversion involves the direct conversion of heat, including light-induced heat, from a heat source, e.g., solar energy, to electricity. Although the concept is almost a hundred years old, the progress of thermionic convertors has been limited by issues such as the space-charge effect and availability of materials with desirable mechanical and electrical properties, while maintaining a...
We propose a method to calculate the output current-voltage characteristics of a light induced thermionic emission device. This approach improves on the existing methods by having both a higher precision and higher range in evaluating the associated integrals, resulting in simulated device characteristics with a wider range of parameters. This method represents a significant step towards the characterization...
In this work, we studied light induced thermionic emission from potassium intercalated carbon nanotube forests. Several recipes were developed for the intercalation process. The intercalated CNT forest was employed as the emitter of a light activated thermionic emission device. The resulting thermionic device was characterized by studying its current-voltage characteristics when illuminated by a focused...
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