Organic light-emitting device

An organic light-emitting device (OLED) comprising:

• a first electrode;
• a second electrode;
• an emissive layer disposed between the first electrode and the second electrode;
• a first hole injection layer disposed between the first electrode and the emissive layer;
• a second hole injection layer disposed between the first hole injection layer and the emissive layer;
• an first electron transport layer disposed between the emissive layer and the second electrode, and
• a second electron transport layer disposed between the first electron transport layer and the second electrode
• wherein
• the first hole injection layer comprises a metal fluoride and a first hole injecting material,
• the second hole injection layer comprises a molybdenum oxide and a second hole injecting material,
• the first electron transport layer comprises a first electron transporting material and does not include a metal oxide, and
• the electron transport layer comprises a second electron transporting material and a metal oxide, wherein the metal oxide is one of lithium oxide (Li2O), molybdenum oxide (MoO3), barium oxide (BaO), and boron oxide (B2O3).