| 摘要 |
The LED has a cathode (C) to inject electrons (e) in an organic hole transport layer (HTL) that transports holes (h) injected in the LED from an anode (A). An assembly formed by a buffer layer (T) and a phosphorescent light-emitting layer (PH) having an emission spectrum partially covering an absorption spectrum of quantum dots, is arranged between the transport layer and an electron transport layer. The buffer layer comprises material whose energy gap is larger than that of a phosphorescent element of the light-emitting layer to avoid diffusion of excitons towards a quantum dot layer (BQ). The material of the buffer layer is selected from a group comprising Thermoset microwave material (TMM)060(RTM: ceramic thermoset polymer composites), 3-(4-Biphenylyl)-4-phenyl-5-tert-butylphenyl-1, 2, 4-triazole, bathocuproine, bathophenantroline, 4, 4', 4''- Tris(carbazol-9-yl)triphenylamine, N, N'-Bis (naphthalen-1-yl)-N, N'-bis(phenyl)benzidine and/or 4, 4'-Bis(carbazol-9-yl)biphenyl. |
