Title :
Defect engineering of diamond cathodes for high temperature solar cells
Author :
Bellucci, A. ; Calvani, P. ; Girolami, M. ; Trucchi, D.M.
Author_Institution :
Inst. of Struct. of Matter, Monterotondo Scalo, Italy
Abstract :
A cathode structure for photon-enhanced thermionic emission was designed for high temperature energy conversion in solar concentrating systems. Surface-hydrogenated diamond is one of the few semiconductors to show negative electron affinity and a work function as low as 1.7 eV if nitrogen-doped, that is connected to a significant thermionic emission at moderate temperatures (up to 800 °C). But diamond is transparent to solar radiation, consequently advanced techniques for preparing an efficient sunlight absorbing diamond are discussed.
Keywords :
diamond; solar absorber-convertors; solar energy concentrators; thermionic cathodes; thermionic emission; cathode structure; high temperature energy conversion; negative electron affinity; photon-enhanced thermionic emission; solar concentrating systems; sunlight absorbing diamond; surface-hydrogenated diamond; Cathodes; Diamonds; Optical surface waves; Photonic band gap; Surface morphology; Surface texture; Thermionic emission; CVD Diamond; Energy conversion; Photo-emission; Solar concentration; Thermionic emission;
Conference_Titel :
Environment and Electrical Engineering (EEEIC), 2015 IEEE 15th International Conference on
Conference_Location :
Rome
Print_ISBN :
978-1-4799-7992-9
DOI :
10.1109/EEEIC.2015.7165413
