The present invention provides an electroluminescent device of Group II-14 VI compound semiconductor which comprises a substrate, a light-emitting portion, and a conductive portion provided at least between the substrate and the light-emitting portion for injecting into the light-emmitting portion the...http://www.google.de/patents/US4988579?utm_source=gb-gplus-sharePatent US4988579 - Electroluminescent device of compound semiconductor
