Very Faint Light Emission in Low-Density Polyethylene Films under dc Field

Abstract

Faint light emission in low-density polyethylene films was detected by using a photon-counting system. The photoncount response rose to a maximum value at a time greater than 1 minute after a step voltage was applied. The emission spectra ranged between 300 and 540 nm. The light-emission process was attributed to a recombination between trapped electrons and trapped holes.