Title :
Microcrystalline CVD-diamond samples as storage media for ultraviolet images
Author :
Mazzeo, Giuseppe ; Salvatori, S. ; Rossi, M.C. ; Conte, G.
Author_Institution :
INFM, Universita degli Studi Roma, Rome, Italy
Abstract :
Photocathode structures have been fabricated by means of thin microcrystalline CVD-diamond samples. Owing to the presence of structural defects in the material, metastable phenomena related to the existence of trap states within the diamond bandgap can be observed. Such effects are mainly reflected in the increase of the subgap photoemission sensitivity of the diamond film after exposure to over bandgap ultraviolet photons (λ<225 nm). This fact suggests the use of diamond as a storage medium for ultraviolet images. The possible structure of an image sensor for UV-radiation based on a large area diamond film on silicon has been proposed and tested.
Keywords :
CVD coatings; diamond; elemental semiconductors; image sensors; optical storage; photocathodes; photoemission; semiconductor thin films; ultraviolet detectors; 225 nm; C; UV-radiation image sensor; diamond bandgap; diamond film; large area diamond film; metastable phenomena; microcrystalline CVD-diamond samples; over bandgap ultraviolet photons; photocathode structures; storage media; structural defects; subgap photoemission sensitivity; trap states; ultraviolet images;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20030100
