Investigation of Charge Injection in Gas-Impregnated Polyethylene by Measurement of Electroluminescence under AC Voltage

Abstract

A pulsed glow discharge is used for sputtering in the presence of a gas flow to form a metal vapour jet suitable for use in a room-temperature metal vapour laser. It is found that the sputtering process is most efficient during the first 50 ps of the discharge pulse. Switching the discharge in the burst mode with a pulse duration of about 15 ps and an interpulse delay of about 18 ps achieves similar metal vapour concentrations in the jet to that attained by steady-pulse sputtering, but requires only half the total discharge energy.

Influence of electrode contact on luminescence from alumina ceramic surface under ac electric field in vacuum

“…The barrier height for charge injection into the surface states of polyethylene has been reported to be Ͻ1 eV. 16 It is expected that under electric field charge carriers are easily injected into the surface states of alumina and transfer between the surface states through a hopping process in the metal-alumina interface. Therefore, EL emission would occur due to the radiative recombination of electrons and holes in this region at a low voltage.…”