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Distributed bragg reflector on color conversion layer with micro cavity for blue OLED lighting application

A Bragg reflector and color conversion technology, which can be used in organic semiconductor devices, electric solid state devices, semiconductor devices, etc., and can solve the problems of difficult flexibility and fragile glass.

Inactive Publication Date: 2018-06-08
SABIC GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, glass is very brittle and difficult to be flexible

Method used

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  • Distributed bragg reflector on color conversion layer with micro cavity for blue OLED lighting application
  • Distributed bragg reflector on color conversion layer with micro cavity for blue OLED lighting application
  • Distributed bragg reflector on color conversion layer with micro cavity for blue OLED lighting application

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Embodiment Construction

[0020] figure 1 with 2 The photoluminescence curves of light-emitting devices are shown, which include: Conventional OLED device: including blue, red, green emitting layers (eg, tandem structure) with charge generation layer respectively; B1: blue OLED+LRF+YAG:Ce ; B2: Microcavity blue OLED+YAG:Ce; and B3: Microcavity blue OLED+LRF+YAG:Ce. As illustrated by the curve associated with B1 (eg conventional phosphor-OLED combined with a light-recycling filter (LRF)), no improvement in luminous efficiency was observed. Those skilled in the art will appreciate that the reduced effect of conventional OLED's blue transmission reflected by the LRF can cancel the increased forward emission recycled by the LRF's yellow reflection. As illustrated by the curve associated with B2 (eg, OLED combined with a modest microcavity), luminous efficiency is improved. Those skilled in the art will understand that the improved efficiency may be due at least in part to the enhanced intensity and nar...

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Abstract

A light emitting device and processes for making the same are disclosed. In an aspect, a light-emitting device comprises a substrate, an organic light emitting diode (OLED) disposed adjacent the substrate, the OLED configured to emit light having a wavelength at about 400nm to about 480nm, a color conversion layer disposed adjacent a side of the substrate opposite the OLED, and a distributed Braggreflector (DBR) disposed adjacent the color conversion layer.

Description

[0001] related application [0002] This application claims priority and benefit to U.S. Provisional Application No. 62 / 221,178, filed September 21, 2015, entitled "DISTRIBUTED BRAGG REFLECTOR ONCOLOR CONVERSION LAYER WITH MICRO CAVITY FOR BLUE OLED LIGHTING APPLICATION," the entire contents of which are for any and Incorporated herein by reference for all purposes. technical field [0003] The present disclosure relates generally to organic light emitting devices (OLEDs), and more particularly to methods and structures that utilize barrier substrates functioning as distributed Bragg reflector (DBR) cavities to, for example, enhance light extraction efficiency and high performance water vapor Transmittance (WVTR). Background technique [0004] Organic light emitting devices (OLEDs) typically include a laminate formed on a substrate such as glass or silicon. A light-emitting layer of light-emitting organic solid, and optionally an adjacent semiconducting layer, is sandwich...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H10K99/00
CPCY02E10/549H10K50/125H10K50/852H10K50/81H10K50/818H10K50/826H10K59/38H10K71/00H10K77/111H10K2102/00H10K2102/311H10K2102/351
Inventor S·H·金S·M·赵
Owner SABIC GLOBAL TECH BV
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