DELAYED LUMINESCENCE OF SOME COMPONENTS OF OPTOELECTRONIC DEVICES

Time-resolved (in the microsecond time range) delayed luminescence spe ctra of several materials used in liquid-crystal displays and in the i nvestigations of the Langmuir-Blodgett monolayers deposited on solid s upport are reported. Data enable one to distinguish between the lumine scence of the sample and additional emission due to the windows materi al and/or to the conducting and orienting layers used as electrodes. A ll investigated support plates exhibit measurable delayed luminescence but in cases of quartz and pyrex plates, emission intensity was much lower than for sodium glass plates. The application of the orienting o r conducting layers on the glass plates diminished the intensity of ob served delayed luminescence of the support plates by shielding them ag ainst the excitation. (C) 1997 Elsevier Science S.A.