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Title:
QUANTUM DOT LIGHT-EMITTING DEVICE, DISPLAY APPARATUS AND MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2022/160109
Kind Code:
A1
Abstract:
Provided in the present disclosure are a quantum dot light-emitting device, a display apparatus and a manufacturing method, which are aimed at solving the problem in the prior art of quantum dot charging and non-radiative recombination occurring due to carrier imbalance in a quantum dot light-emitting device, thus affecting the efficiency of the device and shortening the service life of the device. Provided in the embodiments of the present disclosure is a quantum dot light-emitting device. The quantum dot light-emitting device comprises: a light-emitting layer group, which comprises a first quantum dot light-emitting layer and a second quantum dot light-emitting layer, which are arranged in a laminated manner, wherein the chain length of a first ligand is greater than that of a second ligand, and the difference between the two chain lengths is greater than a first preset value; the difference between the number of carriers arriving at the light-emitting layer group from a first electrode layer and the number of carriers arriving at the light-emitting layer group from a second electrode layer is greater than a second preset value; the side of the light-emitting layer group with the largest number of entering carriers is used as a multi-carrier entry side; and the first quantum dot light-emitting layer is located on the surface of the second quantum dot light-emitting layer that faces the multi-carrier entry side.

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Inventors:
FENG JINGWEN (CN)
Application Number:
PCT/CN2021/073857
Publication Date:
August 04, 2022
Filing Date:
January 26, 2021
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
BOE TECHNOLOGY GROUP CO LTD (CN)
International Classes:
H01L51/50; B82Y30/00; C09K11/00; H05B33/14
Foreign References:
CN113122231A2021-07-16
US20210066631A12021-03-04
CN110890470A2020-03-17
CN108550707A2018-09-18
CN111788866A2020-10-16
US20190276734A12019-09-12
Attorney, Agent or Firm:
TDIP & PARTNERS (CN)
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