For a number of years, cyclic olefin copolymers (COC) have been known for their good chargestoring properties. Due to their high optical transparency, they are ideally suited to study the interaction of trapped space charges with light. Films of different COC grades were doped with various chromophores and studied using thermally stimulated discharge (TSD) and photostimulated discharge (PSD). The space charge profiles were determined in real time using the thermal pulse (TP) technique, where the low-transparency top electrode is heated with a short laser pulse. UV irradiation near 300 nm leads to an accelerated decay of the nearsurface charge density, which can be explained if at least part of the space charges are released from traps with a depth of approx. 4 eV. In addition, the thermal diffusivity was determined from laser-induced temperature phase shifts.
|Number of pages||4|
|Journal||Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP|
|State||Published - 2004|
|Event||2004 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP - Boulder, CO, United States|
Duration: Oct 17 2004 → Oct 20 2004