公开(公告)号：US20210167295A1

公开(公告)日：2021-06-03

申请号：US17046661

申请日：2019-04-04

申请人： Nanoco Technologies Ltd. ,  Kyulux, Inc.

发明人： Stuart STUBBS ,  Nathalie GRESTY ,  James HARRIS ,  Nigel PICKETT ,  Zugang LIU ,  Ayataka ENDO ,  Chris BROWN

IPC分类号： H01L51/00 ,  C09K11/08 ,  C09K11/70 ,  C09K11/06 ,  C09K11/02

摘要： Emissive layers for electroluminescent display devices are described herein. The emissive layer can include a two-dopant system having a population of quantum dots (QDs) and a population of molecules exhibiting thermally activated delayed fluorescence (TADF). In some instances, one or both of the QDs and TADF molecules can be disposed in a host matrix. In some instances, the QDs and TADF molecules can be disposed in separate host matrices. In some instances, an electroluminescent display device can include an emissive layer comprising a population of quantum dots (QDs) and a layer adjacent to the emissive layer, the adjacent layer comprising a population of molecules exhibiting thermally activated delayed fluorescence (TADF).

公开(公告)号：US20210155849A1

公开(公告)日：2021-05-27

申请号：US17046658

申请日：2019-04-04

申请人： Nanoco Technologies Ltd. ,  kyulux, Inc.

发明人： Stuart STUBBS ,  Chris BROWN

IPC分类号： C09K11/70 ,  C09K11/08 ,  C09K11/06 ,  C09K11/02 ,  H01L51/00

摘要： An emissive layer of a top-emitting (TE) printed display comprises a combination of solution-processable nanocrystal quantum dots, thermally activated delayed fluorescent molecules, and a suitable host material along with both electron and hole charge transport materials sandwiched into a microcavity between a reflective bottom electrode and a transparent or semi-transparent top electrode. The electrodes may be reflective metals and the thickness of the emissive layers and charge transport layers may be tuned according to the required resonant wavelength along with the thickness of the top semi-transparent electrode to optimize the resonant condition and maximize the light output.