Efficient triplet harvesting in fluorescence–TADF hybrid warm-white organic light-emitting diodes with a fully non-doped device configuration

2018 ◽  
Vol 6 (15) ◽  
pp. 4257-4264 ◽  
Author(s):  
Juan Zhao ◽  
Zhan Yang ◽  
Xiaojie Chen ◽  
Zongliang Xie ◽  
Tiantian Liu ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
White Oleds ◽  
Triplet Harvesting

An efficient triplet harvesting strategy provided for fluorescence–TADF hybrid white OLEDs with a fully non-doped device configuration.

Triplet Harvesting in White Organic Light-Emitting Diodes

2014 ◽  
Vol 1629 ◽  
Author(s):  
Simone Hofmann ◽  
Karl Leo ◽  
Malte C. Gather
Keyword(s):  
Recent Work ◽  
Single Unit ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Triplet Energy ◽  
Light Emitting ◽  
Organic Light ◽  
White Oleds ◽  
New Compounds ◽  
Triplet Harvesting

ABSTRACTIn this paper, we review our recent work on triplet harvesting (TH) and its application in white organic light-emitting diodes (OLEDs). This includes the configuration of highly efficient single unit two-color and tandem four-color white OLEDs reaching efficacies of more than 30 lm/W at 1000 cd/m², as well as the development of new blue fluorescent emitters. The new compounds are chemically designed to exhibit a high triplet energy to allow TH by a green phosphorescent emitter. In a first step towards white TH OLEDs, we fabricated blue-green TH OLEDs to prove the validity of our concept.

Four color stacked white organic light-emitting diodes utilizing the concept of triplet harvesting

2011 ◽  
Vol 1286 ◽  
Author(s):  
Th. C. Rosenow ◽  
S. Olthof ◽  
S. Reineke ◽  
B. Lüssem ◽  
K. Leo
Keyword(s):  
Light Emitting Diodes ◽  
Blue Emission ◽  
Organic Light Emitting Diodes ◽  
Light Sources ◽  
Emission Layer ◽  
Light Emitting ◽  
Organic Light ◽  
Blue Emitters ◽  
Color Rendering ◽  
Triplet Harvesting

ABSTRACTOrganic light-emitting diodes (OLEDs) are developing into a competitive alternative to conventional light sources. Nevertheless, OLEDs need further improvement in terms of efficiency and color rendering for lighting applications. Fluorescent blue emitters allow deep blue emission and high stability, while phosphorescent blue emitter still suffer from insufficient stability. The concept of triplet harvesting is the key for achieving internal quantum efficiencies up to 100 % and simultaneously benefiting from the advantages of fluorescent blue emitters. Here, we present a stacked OLED consisting of two units comprising four different emitters in total. The first unit takes advantage of the concept of triplet harvesting and combines the light emission of a fluorescent blue and a phosphorescent red emitter. The second unit emits light from a single emission layer consisting of a matrix doped with phosphorescent green and yellow emitters. With this approach, we reach white color coordinates close to the standard illuminant A and a color rendering index of above 75. The presented devices are characterized by high luminous efficacies of above 30 lm/W on standard glass substrates without outcoupling enhancement.

scholarly journals Pure exciplex-based white organic light-emitting diodes with imitation daylight emissions

RSC Advances ◽  
2018 ◽  
Vol 8 (53) ◽  
pp. 30582-30588 ◽  
Author(s):  
Dian Luo ◽  
Chung-Tsung Hsieh ◽  
Yen-Po Wang ◽  
Thomas C. Chuang ◽  
Hsin-Hua Chang ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Hole Transporting ◽  
White Oleds ◽  
Hole Transporting Material

Three hole-transporting material (HTM)/electron-transporting material (ETM) combinations are chosen to generate blue, green and red exciplexes, allowing us to design precise device architectures for the fabrication of exciplex-based white OLEDs with daylight-like emissions.

Multifunctional applications of triazine/carbazole hybrid thermally activated delayed fluorescence emitters in organic light emitting diodes

2019 ◽  
Vol 7 (40) ◽  
pp. 12470-12481 ◽  
Author(s):  
Di Liu ◽  
Deli Li ◽  
Huihui Meng ◽  
Ying Wang ◽  
Lizhu Wu
Keyword(s):  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Multiple Functions ◽  
Thermally Activated ◽  
Organic Light ◽  
White Oleds

A novel meta-linked carbazole/triazine thermally activated delayed fluorescence (TADF) material exhibits multiple functions in OLEDs as a doped and non-doped blue emitter, as a host for other dopants, and as a host emitter in white OLEDs.

scholarly journals Efficient hybrid white organic light-emitting diodes for application of triplet harvesting with simple structure

2016 ◽  
Vol 69 (3) ◽  
pp. 328-334 ◽  
Author(s):  
Kyo Min Hwang ◽  
Song Eun Lee ◽  
Sungkyu Lee ◽  
Han Kyu Yoo ◽  
Hyun Jung Baek ◽  
...  
Keyword(s):  
Simple Structure ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Triplet Harvesting

DOWN-CONVERSION WHITE OLEDS: Down-Conversion White Organic Light-Emitting Diodes Using Microcavity Structure (Adv. Energy Mater. 2/2011)

2011 ◽  
Vol 1 (2) ◽  
pp. 173-173
Author(s):  
Jaewon Lee ◽  
Neetu Chopra ◽  
Debasis Bera ◽  
Sergey Maslov ◽  
Sang-Hyun Eom ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
White Oleds ◽  
Down Conversion ◽  
Energy Mater

Highly efficient chlorine functionalized blue iridium(iii) phosphors for blue and white phosphorescent organic light-emitting diodes with the external quantum efficiency exceeding 20%

2018 ◽  
Vol 6 (25) ◽  
pp. 6656-6665 ◽  
Author(s):  
Yanqin Miao ◽  
Peng Tao ◽  
Long Gao ◽  
Xiangling Li ◽  
Liuwei Wei ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light ◽  
White Oleds

Chlorine functionalized blue iridium(iii) phosphors (Ir1–Ir4) are designed for blue and white OLEDs with maximum EQEs of over 20%.

Recent development of phenanthroimidazole-based fluorophores for blue organic light-emitting diodes (OLEDs): an overview

2018 ◽  
Vol 6 (38) ◽  
pp. 10138-10173 ◽  
Author(s):  
Jairam Tagare ◽  
Sivakumar Vaidyanathan
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Full Color ◽  
Organic Light ◽  
Color Displays ◽  
White Oleds

Full color displays (white OLEDs) require all the primary colors: blue, green, and red. In recent decades, numerous phenanthroimidazole-based emitting materials have been developed for efficient blue OLEDs.

The first aggregation-induced emission fluorophore as a solution processed host material in hybrid white organic light-emitting diodes

2016 ◽  
Vol 4 (29) ◽  
pp. 7020-7025 ◽  
Author(s):  
Yi-Ting Lee ◽  
Yung-Ting Chang ◽  
Chao-Tsen Chen ◽  
Chin-Ti Chen
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Host Material ◽  
Solution Processed ◽  
Light Emitting ◽  
Aggregation Induced Emission ◽  
Organic Light ◽  
White Oleds

TheCzPATPEAIE fluorophore for a solution processed host material in hybrid white OLEDs.

Sign in / Sign up

Export Citation Format

Share Document