Patent ID: 8314545
Filing Date: 2012-11-20
Classification: H01L

Abstract:
1. An organic electroluminescence element, comprising electrodes, a light emitting layer, a hole transport layer for transporting holes to the light emitting layer, and an electron transport layer for transporting electrons to the light emitting layer, wherein said light emitting layer, said hole transport layer and said electron transport layer are formed between the electrodes, while the light emitting layer is formed between said hole transport layer and said electron transport layer, and wherein the light emitting layer has a first region, and a second region, said first region being formed at the side of the hole transport layer, said first region containing light emitting layer host material and a compound functioning as an electron accepting dopant, and said second region being formed at the side of the electron transport layer, said second region containing light emitting layer host material and a compound functioning as a light emitting dopant, wherein said compound functioning as an electron accepting dopant differs from material forming the hole transport layer.