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Printed AM-QDLED and preparation method thereof

A technology of AM-QDLED and manufacturing method, applied in the field of light-emitting devices, can solve problems such as uneven film formation of AM-QDLED, and achieve the effects of improving device performance, flat uniformity, and increasing wettability

Active Publication Date: 2016-01-13
TCL CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a printed AM-QDLED and its manufacturing method, aiming to solve the problem of uneven film formation of the existing printed AM-QDLED

Method used

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  • Printed AM-QDLED and preparation method thereof
  • Printed AM-QDLED and preparation method thereof
  • Printed AM-QDLED and preparation method thereof

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Embodiment Construction

[0042] The present invention provides a printed AM-QD LED and its manufacturing method. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0043] Based on the existing printing system, process and equipment structure, the present invention adjusts the fluidity and film-forming properties of the ink in the pixel defining layer through two key steps to produce printed AM-QD LED devices. One: By adding (insoluble) inorganic nanoparticles to the negative photoresist and making them uniformly distributed, the roughness of the inner slope of the pixel defining layer increases after exposure, development and curing to form the Wenzel effect, so as to enlarge the ink and the pixel defining layer Affinity and hydrop...

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Abstract

The invention discloses a printed AM-QDLED and a preparation method thereof. The method comprises the following steps: (A) preparing a carrier substrate, cleaning the carrier substrate, and preparing a TFT array by an Oxide-OTFT technology; (B) depositing an ITO pixel electrode on the TFT array, carrying out etching to form a positive pattern, coating a negative photoresist by a spin-coating process, preparing a pixel definition layer by a step-by-step exposure method to form an inverted trapezoidal pixel region and adding inorganic nanoparticles to the negative photoresist; (C) preparing a light-emitting layer, an electron injection layer and an electron transmission layer in a groove with the pixel definition layer structure, and finally evaporating a negative layer, wherein ink in the light-emitting layer is prepared from at least two solvents with different surface tension and boiling points; and (D) packaging an AM-QDLED device. An organic functional layer prepared by the invention is flat in surface; the phenomena of device charge concentration, breakdown and uneven display caused by a rough surface can be effectively avoided; the device performance is improved; and the display effect of the device is ensured.

Description

technical field [0001] The invention relates to the field of light-emitting devices, in particular to a printed AM-QD LED and a manufacturing method thereof. Background technique [0002] Compared with traditional OLED materials, quantum dots (QD) have nearly 100% color gamut and excellent weather resistance, and are compatible with existing AMOLED production equipment and processes. Active electroluminescent AM-QDLEDs made with quantum dots as the light-emitting layer Display and lighting devices can greatly improve the display effect, and reduce the requirements for the production environment to reduce the production cost. At the same time, quantum dots are more suitable to be produced by solution preparation methods such as Inkjet (inkjet) and Nozzlejet (nozzle jet). Due to the characteristics of large area, flexibility and low cost that FMM or SMS mask production methods do not have, printed quantum dot AM-QD LED devices have attracted more and more attention from manuf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/56H01L51/00H10K99/00
CPCH10K50/115H10K71/00
Inventor 李耘闫晓林
Owner TCL CORPORATION
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