Investigation of pure green-colour emission from inorganic-organic hybrid LEDs based on colloidal CdSe/ZnS quantum dots

被引：1

作者：

Nguyen Huu Tuan ^{[1
,2
]}

Lee, Soonil ^{[1
,2
]}

Nguyen Nang Dinh ^{[3
]}

机构：

[1] Ajou Univ, Dept Phys, Suwon 443749, South Korea

[2] Ajou Univ, Lab Nano Mat & Devices Informat Display, Div Energy Syst Res, Suwon 443749, South Korea

[3] Univ Engn & Technol, VNU Hanoi, Dept Nano Semicond Mat & Devices, Hanoi, Vietnam

来源：

INTERNATIONAL JOURNAL OF NANOTECHNOLOGY | 2013年 / 10卷 / 3-4期

基金：

新加坡国家研究基金会;

关键词：

CdSe/ZnS; colloidal quantum dot; QD-based hybrid LED; hole blocking layer; LIGHT-EMITTING-DIODES; NANOCRYSTALS; ELECTROLUMINESCENCE; MONOLAYERS;

D O I：

10.1504/IJNT.2013.053144

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We studied the operation characteristics of inorganic-organic hybrid light emitting devices (HLEDs) that have a green CdSe/ZnS quantum dot (QD) emitting layer (EML) and a 1,3,5-tris(N-phenylbenzimidazol-2-yl)-benzene (TPBi) hole blocking layer (HBL). A series of devices with a different thickness TPBi HBL all showed pure electroluminescence that is consistent with green photoluminescence of colloidal QDs without any colour contamination from organic layers. The best performance, which we attributed to more balanced charge carrier supply to a QD EML and efficient energy transfer from excitions in a TPBi layer to QDs, was observed from the device with a TPBi HBL of 20 nm thickness: the deep green emission with the luminous efficiency of 1.55 cd/A at standard video brightness (200 cd/m(2)) and the luminance as large as similar to 1800 cd/m(2).

引用

页码：304 / 312

页数：9