Formation of backcontacts on diamond electron emitters

Electron emission from boron B.- and nitrogen N.-doped diamond electron emitter with silver Ag.-loaded conductive epoxy, titanium Ti.rgold Au., aluminum Al. and amorphous carbon contacts are studied. Both TirAu and amorphous carbon contacts on B-doped diamond electron emitters lead to lower turn-on voltage compared to other contacts, while the turn-on voltage of N-doped diamond electron emitter is independent on the backcontacts. q1999 Elsevier Science B.V. All rights reserved