公开(公告)号：US20160027960A1

公开(公告)日：2016-01-28

申请号：US14732772

申请日：2015-06-07

Applicant: QD VISION, INC.

Inventor： SETH COE-SULLIVAN ,  MARSHALL COX ,  CAROLINE J. ROUSH ,  JONATHAN S. STECKEL

IPC: H01L33/06 ,  H01L51/50 ,  H01L27/15 ,  H01L33/00 ,  H01L33/28

CPC classification number: H01L33/06 ,  B82Y20/00 ,  B82Y30/00 ,  C09K11/02 ,  C09K11/565 ,  C09K11/883 ,  H01L27/156 ,  H01L33/0029 ,  H01L33/28 ,  H01L51/5012 ,  H01L51/502 ,  H05B33/145

Abstract: Light-emitting devices and displays with improved performance are disclosed. A light-emitting device includes an emissive material disposed between a first electrode, and a second electrode. Various embodiments include a device having a peak external quantum efficiency of at least about 2.2%; a device that emits light having a CIE color coordinate of x greater than 0.63; a device having an external quantum efficiency of at least about 2.2 percent when measured at a current density of 5 mA/cm2. Also disclosed is a light-emitting device comprising a plurality of semiconductor nanocrystals capable of emitting red light upon excitation, wherein the device has a peak luminescent efficiency of at least about 1.5 lumens per watt. Also disclosed is a light-emitting device comprising a plurality of semiconductor nanocrystals capable of emitting red light upon excitation, wherein the device has a luminescent efficiency of at least about 1.5 lumens per watt when measured at a current density of 5 milliamps/square centimeter. Also disclosed is a light-emitting device comprising a plurality of semiconductor nanocrystals capable of emitting green light upon excitation, wherein the device has a peak external quantum efficiency of at least about 1.1 percent. Further disclosed is a light-emitting device comprising a plurality of semiconductor nanocrystals, wherein the device has a luminescent efficiency of at least about 3 lumens per watt when measured at a current density of 5 mA/cm2. Further disclosed is a light-emitting device comprising a plurality of semiconductor nanocrystals capable of emitting green light upon excitation, wherein the device has an external quantum efficiency of at least about 2% when measured at a current density of 5 mA/cm2. Other light-emitting devices and displays with improved performance are disclosed. Also disclosed are methods for preparing and for purifying semiconductor nanocrystals.

Abstract translation: 公开了具有改进性能的发光装置和显示器。 发光装置包括设置在第一电极和第二电极之间的发光材料。 各种实施方案包括具有至少约2.2％的峰值外部量子效率的器件; 发射具有x大于0.63的CIE色坐标的光的装置; 当以5mA / cm 2的电流密度测量时，具有至少约2.2％的外部量子效率的器件。 还公开了包括能够在激发时发射红光的多个半导体纳米晶体的发光器件，其中该器件具有至少约1.5流明/瓦特的峰值发光效率。 还公开了一种发光器件，其包括能够在激发时发射红光的多个半导体纳米晶体，其中当以5毫安/平方厘米的电流密度测量时，该器件具有至少约1.5流明/瓦特的发光效率。 还公开了一种发光器件，其包括在激发时能够发射绿光的多个半导体纳米晶体，其中该器件具有至少约1.1％的峰值外部量子效率。 还公开了包括多个半导体纳米晶体的发光器件，其中当以5mA / cm 2的电流密度测量时，该器件具有至少约3流明/瓦的发光效率。 进一步公开的是一种发光器件，其包括能够在激发时发出绿光的多个半导体纳米晶体，其中当以5mA / cm 2的电流密度测量时，该器件具有至少约2％的外部量子效率。 公开了其他具有改进性能的发光装置和显示器。 还公开了制备和纯化半导体纳米晶体的方法。