公开(公告)号：US08922116B2

公开(公告)日：2014-12-30

申请号：US13731442

申请日：2012-12-31

Applicant: Semiconductor Energy Laboratory, Co., Ltd.

Inventor： Daisuke Kumaki ,  Hisao Ikeda ,  Hiroko Abe ,  Satoshi Seo

IPC: H01L51/50 ,  H01L51/52 ,  H01L27/32

CPC classification number: H01L51/5237 ,  H01L27/3209 ,  H01L27/3241 ,  H01L27/3244 ,  H01L51/5048 ,  H01L51/506 ,  H01L51/5076 ,  H01L51/5278 ,  Y10S428/917 ,  Y10T428/24942

Abstract: A light emitting element of the invention includes n pieces of light emitting layers (n is a natural number) between first and second electrodes. A first layer and a second layer are provided between the mth light emitting layer (m is a natural number of 1≦m≦n) and the m+1th light emitting layer. The first and second layers are contacted to each other. The first layer contains a substance that transports holes easily and a substance with an electron accepting property. The second layer contains a substance that transports electrons easily and a substance with an electron donating property. Molybdenum oxide is used as the substance with the electron accepting property.

Abstract translation: 本发明的发光元件在第一和第二电极之间包括n个发光层（n是自然数）。 在第m个发光层（m是1＆lt; nlE; m＆nlE; n）的自然数和第m + 1发光层之间设置第一层和第二层。 第一层和第二层彼此接触。 第一层含有容易传输孔的物质和具有电子接受性的物质。 第二层含有易于输送电子的物质和具有给电子性质的物质。 使用氧化钼作为具有电子接受性的物质。

公开(公告)号：US20130214256A1

公开(公告)日：2013-08-22

申请号：US13731442

申请日：2012-12-31

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Daisuke Kumaki ,  Hisao Ikeda ,  Hiroko Abe ,  Satoshi Seo

IPC: H01L51/52 ,  H01L27/32

CPC classification number: H01L51/5237 ,  H01L27/3209 ,  H01L27/3241 ,  H01L27/3244 ,  H01L51/5048 ,  H01L51/506 ,  H01L51/5076 ,  H01L51/5278 ,  Y10S428/917 ,  Y10T428/24942

Abstract: A light emitting element of the invention includes n pieces of light emitting layers (n is a natural number) between first and second electrodes. A first layer and a second layer are provided between the mth light emitting layer (m is a natural number of 1≦m≦n) and the m+1th light emitting layer. The first and second layers are contacted to each other. The first layer contains a substance that transports holes easily and a substance with an electron accepting property. The second layer contains a substance that transports electrons easily and a substance with an electron donating property. Molybdenum oxide is used as the substance with the electron accepting property.

Abstract translation: 本发明的发光元件在第一和第二电极之间包括n个发光层（n是自然数）。 在第m个发光层（m是1 @ m @ n的自然数）和第m + 1个发光层之间设置第一层和第二层。 第一层和第二层彼此接触。 第一层含有容易传输孔的物质和具有电子接受性的物质。 第二层含有易于输送电子的物质和具有给电子性质的物质。 使用氧化钼作为具有电子接受性的物质。

公开(公告)号：US20130168650A1

公开(公告)日：2013-07-04

申请号：US13682831

申请日：2012-11-21

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hiroko Abe

IPC: H01L51/50

CPC classification number: H01L51/504 ,  C09K11/025 ,  C09K11/06 ,  C09K2211/1007 ,  C09K2211/1029 ,  C09K2211/1074 ,  C09K2211/185 ,  H01L51/0052 ,  H01L51/0058 ,  H01L51/0059 ,  H01L51/006 ,  H01L51/0072 ,  H01L51/0077 ,  H01L51/0081 ,  H01L51/0085 ,  H01L51/0087 ,  H01L51/5016 ,  H01L51/5036 ,  H01L51/5206 ,  H01L51/5221 ,  H01L51/5253 ,  H05B33/14 ,  Y02B20/181 ,  Y10S428/917 ,  Y10T428/24942

Abstract: An electroluminescent element which can easily control the balance of color in white emission (white balance) is provided according to the present invention. The electroluminescent element comprises a first light-emitting layer containing one kind or two or more kinds of light-emitting materials, and a second light-emitting layer containing two kinds of light-emitting materials (a host material and a phosphorescent material) in which the phosphorescent material is doped at a concentration of from 10 to 40 wt %, preferably, from 12.5 to 20 wt %. Consequently, blue emission can be obtained from the first light-emitting layer and green and red (or orange) emission can be obtained from the second light-emitting layer. An electroluminescent element having such device configuration can easily control white balance since emission peak intensity changes at the same rate in case of increasing a current density.

Abstract translation: 根据本发明提供了可以容易地控制白色发射（白平衡）中的色彩平衡的电致发光元件。 电致发光元件包括含有一种或两种以上发光材料的第一发光层和含有两种发光材料（主体材料和磷光材料）的第二发光层，其中 磷光材料以10至40重量％，优选12.5至20重量％的浓度掺杂。 因此，可以从第一发光层获得蓝色发光，并且可以从第二发光层获得绿色和红色（或橙色）发射。 具有这种器件结构的电致发光元件可以容易地控制白平衡，因为在增大电流密度的情况下发射峰强度以相同的速率变化。