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Materials and methods for OLED microcavities and buffer layers

A buffer layer and microcavity technology, applied in the field of materials and methods for OLED microcavity and buffer layer

Inactive Publication Date: 2014-03-05
KATEEVA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No traditional technology such as VTE for forming organic thin films offers the large area patterning capabilities of inkjet printing or combines the capabilities of inkjet printing with the high uniformity, purity and thickness control achieved by vapor deposition

Method used

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  • Materials and methods for OLED microcavities and buffer layers
  • Materials and methods for OLED microcavities and buffer layers
  • Materials and methods for OLED microcavities and buffer layers

Examples

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example 1

[0142] This example demonstrates the functionality and excellent properties of the OLED component and the method of producing an OLED component according to the present teaching. For a 100 nm thick film, 2 drops of ink (approximately 12 picoliters) were applied at 1.2% ink concentration at 100 Hz. The loading temperature was 150°C. A vaporization temperature of about 250° C. is used over a period of time from about 200 milliseconds to about 1.0 seconds. The solids were then evaporated using a temperature ramp of 250°C - 380°C over a period of time from approximately 200 milliseconds to 800 milliseconds. A purge temperature of 350°C to 900°C is then used. The printing pitch is about 50 μm. The deposited film appeared hazy and had an AFM surface roughness greater than 5.0 nm. The printed film was post-baked at from about 150°C to about 200°C for from about 10 seconds to about 5.0 minutes on a hot plate in a nitrogen atmosphere. Atomic force microscopy (AFM) data confirmed t...

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Abstract

The present teachings provide methods for forming organic layers for an organic light-emitting device (OLED) using an inkjet printing or thermal printing process. The method can further use one or more additional processes, such as vacuum thermal evaporation (VTE), to create an OLED stack. OLED stack structures are also provided wherein at least one of the charge injection or charge transport layers is formed by an inkjet printing or thermal printing method at a high deposition rate. 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. An OLED microcavity is also provided and can be formed by one of more of the methods.

Description

[0001] related application [0002] This application claims priority to U.S. Patent Application Nos. 13 / 333,867, filed December 21, 2011, and 13 / 360,597, filed January 27, 2012, and also claims the Priority of US Provisional Patent Application Nos. 61 / 499,465 and 61 / 499,496, which are hereby incorporated by reference in their entirety. technical field [0003] The present teachings relate to processes for forming layers of an organic light emitting device (OLED). The present teaching also relates to OLED stack structures. Background technique [0004] OLEDs utilize thin organic films that emit light when a voltage is applied across the device. OLEDs are becoming an increasingly interesting technology for use in applications such as flat panel displays, lighting and backlighting. OLED technology is discussed in Geffroy et al., "Organic light-emitting diode (OLED) technology: material devices and display technologies," Polym., Int., 55:572-582 (2006), and in U.S. Patent Nos...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/56
CPCH01L51/0005H01L51/5265H01L33/0095H01L33/12H01L51/5262H10K71/135H10K59/876H10K71/13H01L2924/12044H10K50/85H10K50/82H10K50/818H10K50/852
Inventor J.陈I.米拉德S.范斯利克I.特雷古布C.马迪甘
Owner KATEEVA
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