SEARCH Articles Figures Tables Double-layered organic electroluminescent device Electrical excitation multilayer organic electroluminescent devices Electroluminescence Electroluminescence devices Electroluminescent Electroluminescent devices Multilayer organic electroluminescent devices Multilayer organic electroluminescent devices redox potential and charge injection Organic devices Organic electroluminescence Organic electroluminescent devices Organic electroluminescent devices Organic electroluminescent devices OLEDs) Organic electroluminescent devices applications