An organic light-emitting diode (OLED) device produces white light, includes a) an anode; b) a hole-transporting layer disposed over the anode; c) a blue light-emitting layer disposed over the hole-transporting layer; d) an electron-transporting layer disposed over the blue light-emitting layer; e) a...http://www.google.fr/patents/US7662485?utm_source=gb-gplus-shareBrevet US7662485 - White organic light-emitting devices with improved performance
White organic light-emitting devices with improved performance
