Results 261 to 270 of about 223,988 (345)

Approaching Nearly 40% External Quantum Efficiency in Organic Light Emitting Diodes Utilizing a Green Thermally Activated Delayed Fluorescence Emitter with an Extended Linear Donor–Acceptor–Donor Structure

Advances in Materials, 2021
Thermally activated delayed fluorescence (TADF) emitters featuring preferential horizontal emitting dipole orientation (EDO) are in urgent demand for enhanced optical outcoupling efficiency in organic light‐emitting diodes (OLEDs).
Yang Chen, Dongdong Zhang, Yuewei Zhang, Xuan Zeng, Tianyu Huang, Ziyang Liu, Guomeng Li, Lian Duan   +7 more
semanticscholar   +1 more source

Organic Light-Emitting Diodes

2017
The 2014 Nobel Prize in Physics was awarded “for the invention of efficient blue light-emitting diodes (LEDs) which has enabled bright and energy-saving white light sources” [1, 2, 3], setting a clear target to mankind: energy-efficient and environmental-friendly light sources [4]. The first organic LED (OLED) was reported in 1987 by a team at Kodak [5]
Kordt, Pascal, Bobbert, Peter, Coehoorn, Reinder, May, Falk, Lennartz, Christian, Andrienko, Denis   +5 more
  +5 more sources

Tandem Organic Light‐Emitting Diodes

Advanced Materials, 2016
A tandem organic light‐emitting diode (OLED) is an organic optoelectronic device that has two or more electroluminescence (EL) units connected electrically in series with unique intermediate connectors within the device. Researchers have studied this new OLED architecture with growing interest and have found that the current efficiency of a tandem OLED
Man-Keung, Fung, Yan-Qing, Li, Liang-Sheng, Liao   +2 more
openaire   +2 more sources

Emerging Biomedical Applications of Organic Light‐Emitting Diodes

Advanced Optical Materials, 2021
As solid‐state light sources based on amorphous organic semiconductors, organic light‐emitting diodes (OLEDs) are widely used in modern smartphone displays and TVs.
Caroline Murawski, M. Gather
semanticscholar   +1 more source

Nanoscale Organic Light-Emitting Diodes

Nano Letters, 2005
This study reports the fabrication and characterization of nanoscale organic light-emitting diodes (nano-OLEDs) based on poly[2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylene vinylene] (MEH-PPV). The nano-OLEDs were fabricated by spin casting MEH-PPV into cylindrical nanoholes lithographically patterned into silicon nitride.
Hiromichi, Yamamoto, John, Wilkinson, James P, Long, Konrad, Bussman, Joseph A, Christodoulides, Zakya H, Kafafi   +5 more
openaire   +2 more sources

Photoprogrammable Organic Light‐Emitting Diodes

Angewandte Chemie, 2009
AbstractLicht im Speicher: Der Einbau eines vernetzbaren photochromen Dithienylperfluorcyclopentens (DTE) in organische Leuchtdioden (OLEDs) ermöglicht die Individualisierung der Emissionsfläche, z. B. für die Anwendung in Anzeigeelementen. Das Arbeitsprinzip beruht auf dem Schalten der Injektionsbarriere für Löcher (positive Ladungsträger). Sehr große
Philipp, Zacharias, Malte C, Gather, Anne, Köhnen, Nina, Rehmann, Klaus, Meerholz   +4 more
openaire   +2 more sources

White Organic Light‐Emitting Diodes

Advanced Materials, 2010
AbstractWhite organic light‐emitting diodes (WOLEDs) offer a range of attractive characteristics and are in several regards conceptually different from most currently used light sources. From an application perspective, their advantages include a high power efficiency that rivals the performance of fluorescent lamps and inorganic LEDs and the potential
Malte C, Gather, Anne, Köhnen, Klaus, Meerholz   +2 more
openaire   +2 more sources

Afterglow Organic Light‐Emitting Diode

Advanced Materials, 2015
An afterglow organic light-emitting diode (OLED) that displays electroluminescence with long transient decay after it is turned off is demonstrated. This OLED exhibits blue and green dual emission originating from fluorescence and phosphorescence, respectively. A phosphorescence lifetime of 4.3 s is achieved.
Ryota, Kabe, Naoto, Notsuka, Kou, Yoshida, Chihaya, Adachi   +3 more
openaire   +2 more sources

Organic light emitting diodes

Proceedings of 8th International Conference on Indium Phosphide and Related Materials, 2002
Organic light emitting diodes with a complex multilayer structure have been successfully fabricated for bright light emission in the entire visible spectral region. The CIE coordinates of the blue, green, and red emitting electroluminescent devices are plotted in the chromaticity diagram. Double heterostructure organic LEDs with separate hole injection
W. Kowalsky, D. Ammermann, A. Bohler, S. Dirr   +3 more
openaire   +1 more source

Efficient and Stable Deep‐Blue Fluorescent Organic Light‐Emitting Diodes Employing a Sensitizer with Fast Triplet Upconversion

Advances in Materials, 2020
Multiple donor–acceptor‐type carbazole–benzonitrile derivatives that exhibit thermally activated delayed fluorescence (TADF) are the state of the art in efficiency and stability in sky‐blue organic light‐emitting diodes.
Dongdong Zhang, Xiaozeng Song, A. Gillett, Bluebell H. Drummond, Saul T. E. Jones, Guomeng Li, Hanqing He, Minghan Cai, D. Credgington, Lian Duan   +9 more
semanticscholar   +1 more source