scholarly journals Triplet Harvesting with a Simple Aromatic Carbonyl

ChemPhysChem ◽  
2017 ◽  
Vol 18 (17) ◽  
pp. 2314-2317 ◽  
Author(s):  
Christian Torres Ziegenbein ◽  
Sascha Fröbel ◽  
Maria Glöß ◽  
Roberto S. Nobuyasu ◽  
Przemyslaw Data ◽  
...  
Keyword(s):  
Triplet Harvesting

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 Two-photon-excited ultralong organic room temperature phosphorescence by dual-channel triplet harvesting

2019 ◽  
Vol 10 (31) ◽  
pp. 7352-7357 ◽  
Author(s):  
Zhu Mao ◽  
Zhan Yang ◽  
Chao Xu ◽  
Zongliang Xie ◽  
Long Jiang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Energy Gap ◽  
Infrared Laser ◽  
Concentration Quenching ◽  
Ambient Conditions ◽  
Room Temperature Phosphorescence ◽  
Small Energy ◽  
Two Photon ◽  
Dual Channel ◽  
Triplet Harvesting

Small energy gap boosts dual-channel triplet harvesting via TADF and UOP, which suppresses long-lived triplet concentration quenching. An infrared laser (808 nm) is able to induce persistent emission under ambient conditions.

Triplet Harvesting with 100% Efficiency by Way of Thermally Activated Delayed Fluorescence in Charge Transfer OLED Emitters

2013 ◽  
Vol 25 (27) ◽  
pp. 3707-3714 ◽  
Author(s):  
Fernando B. Dias ◽  
Konstantinos N. Bourdakos ◽  
Vygintas Jankus ◽  
Kathryn C. Moss ◽  
Kiran T. Kamtekar ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Triplet Harvesting

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

Boron Subphthalocyanines as Triplet Harvesting Materials within Organic Photovoltaics

2015 ◽  
Vol 6 (15) ◽  
pp. 3121-3125 ◽  
Author(s):  
Jeffrey S. Castrucci ◽  
David S. Josey ◽  
Emmanuel Thibau ◽  
Zheng-Hong Lu ◽  
Timothy P. Bender
Keyword(s):  
Organic Photovoltaics ◽  
Triplet Harvesting

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.

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