公开(公告)号：US09786862B2

公开(公告)日：2017-10-10

申请号：US14466686

申请日：2014-08-22

Applicant: LG Display Co., Ltd.

Inventor： Jae-Il Song ,  Seung-Ryong Joung ,  So-Yeon Ahn

IPC: H01L29/08 ,  H01L51/50

CPC classification number: H01L51/5044

Abstract: An organic light emitting device including a first electrode connected to a thin film transistor formed on a substrate, a second electrode opposite to the first electrode, and an organic laminate formed between the first electrode and the second electrode and including a hole transport layer, a multilayer-light emitting structure, and an electron transport layer. The multilayer-light emitting structure includes at least two light emitting layers emitting light of different colors through recombination of electrons and holes injected through the first and second electrodes, and a charge transport control layer formed of a bipolar material transporting both electrons and holes at boundaries between the at least two light emitting layers and controlling the amount of charges transported between the at least two light emitting layers.

公开(公告)号：US20130119357A1

公开(公告)日：2013-05-16

申请号：US13672977

申请日：2012-11-09

Applicant: LG Display Co., Ltd

Inventor： Hwa-Kyung Kim ,  Sung-Hoon Pieh ,  Jae-Il Song ,  Sung-Jae Ko

IPC: H01L51/50 ,  H05B33/14

CPC classification number: H01L51/5048 ,  H01L27/3209 ,  H01L51/5265 ,  H01L2251/5376 ,  H05B33/14

Abstract: A white organic light emitting device, with improved color shift characteristics and improved efficiency according to viewing angle changes by controlling conditions for designing an optical path in organic material layers between a cathode and an anode or adjusting interior or exterior thicknesses of the organic material layers, has a structure including a first electrode and layers between the first electrode and a second electrode satisfies an optical path condition represented by the following equation n a  d a λ + ∑ j   n j w  d j w λ = 1.85 ∼ 2.15 with respect to emissions of the first and second stacks, where λ is an emission peak wavelength of the first stack or the second stack, na and da are a refractive index and a thickness of a transparent electrode selected from the first and second electrode, and nw and dw are a refractive index and a thickness of any one of the layers disposed between the first electrode and the second electrode, respectively.

Abstract translation: 通过控制用于设计阴极和阳极之间的有机材料层中的光路的条件或调节有机材料层的内部或外部厚度，根据视角改变颜色偏移特性和改进效率的白色有机发光器件， 具有包括第一电极和在第一电极和第二电极之间的层的结构满足由以下等式表示的光路条件：对于发射的第一电极和第二电极的发射，满足由以下等式表示的光路条件：naλd +λ= 1.85〜2.15 第一和第二堆叠，其中λ是第一堆叠或第二堆叠的发射峰值波长，na和da是从第一和第二电极选择的透明电极的折射率和厚度，nw和dw是折射率 指数和分别设置在第一电极和第二电极之间的层中的任一层的厚度 。