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Effects Of Bandgap On Secondary Electron Emission For Graphitic Carbon Semiconductiors, Jodie Gillespie, Jr Dennison
Effects Of Bandgap On Secondary Electron Emission For Graphitic Carbon Semiconductiors, Jodie Gillespie, Jr Dennison
Jodie Corbridge Gillespie
Preliminary data indicates a relationship between bandgap width and magnitude of secondary electron (SE) yield. Our work extends this research to investigate the correlation of small bandgap width to SE yield. These trends are compared with current semiempirical models of two limiting cases, conductors and large bandgap semiconductors. Specifically, five graphitic amorphous carbon (g-C) samples of decreasing bandgap width were produced by vacuum annealing from 0C-1050C. Preliminary data shows a 30of g-C above nanocrystalline graphite. Measurements include SE yields, backscattered yields and electron emission spectra, as well as characterization with SEM, photoyields, AES, resistivity, and Raman spectroscopy. SE yields were …