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Materials and methods for controlling properties of organic light-emitting device

A technology of organic light-emitting devices and organic materials, which is applied in the manufacture of electric solid-state devices, semiconductor devices, and semiconductor/solid-state devices, etc., can solve the problems of dissatisfaction, long deposition time, slowness, etc. Effect of deposition rate

Inactive Publication Date: 2012-12-26
KATEEVA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

In this OLED deposition method, the organic layer is usually deposited at a slow deposition rate (1 angstrom / s to 5 angstrom / s), and when depositing a thick buffer layer, the deposition time is unsatisfactorily long

Method used

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  • Materials and methods for controlling properties of organic light-emitting device
  • Materials and methods for controlling properties of organic light-emitting device
  • Materials and methods for controlling properties of organic light-emitting device

Examples

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Embodiment 1

[0124] This example shows the function and excellent performance of the OLED component according to the invention and its manufacturing method. For a 100 nm thick film, 2 drops of ink (about 12 parts per trillion liters) were applied at 100 Hz at an ink concentration of 1.2%. The loading temperature was 150°C. A boiling temperature of about 250°C for a period of time from about 200 milliseconds to about 1.0 second is used. Then, a temperature ramp from 250°C to 380°C for a period of about 200 microseconds to 800 microseconds was used to evaporate the solids. A cleaning temperature of 350°C to 900°C is then used. The printing pitch is about 50 μm. The in situ deposited film was found to look hazy and had an AFM surface roughness greater than 5.0 nm. The printed film is post baked at about 150°C to about 200°C for about 10 seconds to about 5.0 minutes on a hot plate in a nitrogen atmosphere. Atomic force microscopy (AFM) data confirmed that the surface roughness dropped bel...

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Abstract

The present teachings provide methods for depositing and patterning organic light-emitting device (OLED) buffer layers. The method can use a thermal printing process and one or more additional processes, such as vacuum thermal evaporation (VTE), to create an OLED stack. OLED stack structures are also provided wherein which at least one of the charge injection or charge transport layers is formed by a thermal printing method at a high deposition rate. The organic layer can be subject to post-deposition treatment such as baking. The structure of the organic layer can be amorphous, crystalline, porous, dense, smooth, rough, or a combination thereof, depending on deposition parameters and post-treatment conditions. The organic layer can improve light out-coupling efficiency of an OLED, increase conductivity, decrease index of refraction, and / or modify the emission chromaticity of an OLED.

Description

technical field [0001] The present invention relates to a method for forming layers of an organic light emitting device (OLED). The invention also relates to OLED stack structures. Background technique [0002] OLEDs use thin organic films that emit light when a voltage is applied across the device. OLEDs are becoming an even more interesting technology for applications such as flat panel displays, lighting and background lighting. OLED technology is reviewed in Geffroy et al., "Organic light-emitting diode (OLED) technology: material devices and display technologies," Polym., Int., 55:572-582 (2006). Several OLED materials and constructions are described in US Patent Nos. 5,844,363, 6,303,238, and 5,707,745, which are hereby incorporated by reference in their entirety. [0003] In many cases, due to internal reflection at the air interface, edge emission, dissipation within the light-emitting layer or other layers, waveguide effects within the light-emitting layer or oth...

Claims

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Application Information

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IPC IPC(8): H01L51/56H01L51/50
CPCH01L51/56H01L51/0013H01L51/5275H10K71/18H10K71/441H10K59/879H10K50/858H10K71/00
Inventor 陈江龙伊恩·米拉尔德史蒂文·范·斯莱克伊娜·特格布康纳尔·马迪根
Owner KATEEVA
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