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Organic Light Emitting Diode

Organic Light Emitting Diode Book
Author : Marco Mazzeo
Publisher : BoD – Books on Demand
Release : 2010-08-18
ISBN : 9533071400
Language : En, Es, Fr & De

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Book Description :

Organic light emitting diodes (OLEDs) have attracted enormous attention in the recent years because of their potential for flat panel displays and solid state lighting. This potential lies in the amazing flexibility offered by the synthesis of new organic compounds and by low-cost fabrication techniques, making these devices very promising for the market. The idea that flexible devices will replace standard objects such as television screens and lighting sources opens, indeed, a new scenario, where the research is very exciting and multidisciplinary. The aim of the present book is to give a comprehensive and up-to-date collection of contributions from leading experts in OLEDs. The subjects cover fields ranging from molecular and nanomaterials, used to increase the efficiency of the devices, to new technological perspectives in the realization of structures for high contrast organic displays and low-cost organic white light sources. The volume therefore presents a wide survey on the status and relevant trends in OLEDs research, thus being of interest to anyone active in this field. In addition, the present volume could also be used as a state-of-the-art introduction for young scientists.

Organic Light Emitting Diodes OLEDs

Organic Light Emitting Diodes  OLEDs  Book
Author : Alastair Buckley
Publisher : Elsevier
Release : 2013-08-31
ISBN : 0857098942
Language : En, Es, Fr & De

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Book Description :

Organic light-emitting diodes (OLEDs) are opening up exciting new applications in the area of lighting and displays. OLEDs are self emissive and by careful materials and device design can generate colours across the visible spectrum. Together with simple monolithic fabrication on a range of different substrates, these diverse material properties give OLEDs key advantages over existing display and lighting technology. This important book summarises key research on materials, engineering and the range of applications of these versatile materials. Part one covers materials for OLEDs. Chapters review conjugated polymers, transparent conducting thin films, iridium complexes and phosphorescent materials. Part two discusses the operation and engineering of OLED devices. Chapters discuss topics such as highly efficient pin-type OLEDs, amorphous organic semiconductors, nanostructuring techniques, light extraction, colour tuning, printing techniques, fluorenone defects and disruptive characteristics as well as durability issues. Part three explores the applications of OLEDs in displays and solid-state lighting. Applications discussed include displays, microdisplays and transparent OLEDs, sensors and large-area OLED lighting panels. Organic light-emitting diodes (OLEDs) is a standard reference for engineers working in lighting, display technology and the consumer electronics sectors, as well as those researching OLEDs. Summarises key research on the materials, engineering and applications of OLEDs Reviews conjugated polymers, transparent conducting thin films Considers nanostructuring OLEDS for increasing levels of efficiency

OLED Fundamentals

OLED Fundamentals Book
Author : Daniel J. Gaspar,Evgueni Polikarpov
Publisher : CRC Press
Release : 2015-05-15
ISBN : 1466515198
Language : En, Es, Fr & De

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Book Description :

A Comprehensive Source for Taking on the Next Stage of OLED R&D OLED Fundamentals: Materials, Devices, and Processing of Organic Light-Emitting Diodes brings together key topics across the field of organic light-emitting diodes (OLEDs), from fundamental chemistry and physics to practical materials science and engineering aspects to design and manufacturing factors. Experts from top academic institutions, industry, and national laboratories provide thorough, up-to-date coverage on the most useful materials, devices, and design and fabrication methods for high-efficiency lighting. The first part of the book covers all the construction materials of OLED devices, from substrate to encapsulation. For the first time in book form, the second part addresses challenges in devices and processing, including architectures and methods for new OLED lighting and display technologies. The book is suitable for a broad audience, including materials scientists, device physicists, synthetic chemists, and electrical engineers. It can also serve as an introduction for graduate students interested in applied aspects of photophysics and electrochemistry in organic thin films.

Principles and Applications of Organic Light Emitting Diodes OLEDs

Principles and Applications of Organic Light Emitting Diodes  OLEDs  Book
Author : N. Thejo Kalyani,Hendrik Swart,S. J. Dhoble
Publisher : Woodhead Publishing
Release : 2017-05-15
ISBN : 0081012497
Language : En, Es, Fr & De

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Book Description :

Principles and Applications of Organic Light Emitting Diodes (OLEDs)explores the ways in which the development of organic semiconductor materials is opening up new applications in electronic and optoelectronic luminescent devices. The book begins by covering the principles of luminescence and the luminescent properties of organic semiconductors. It then covers the development of luminescent materials for OLEDs, discussing the advantages and disadvantages of organic versus inorganic luminescent materials. The fabrication and characterization of OLEDs is also covered in detail, including information on, and comparisons of, vacuum deposition and solution techniques. Finally, applications of OLEDs are explored, including OLEDs in solid-state lighting, colored lighting, displays and potential future applications, such as ultra-thin and flexible technologies. This book is an excellent resource both for experts and newcomers to the field of organic optoelectronics and OLEDs. It is ideal for scientists working on optical devices, lighting, display and imaging technologies, and for all those engaged in research in photonics, luminescence and optical materials. Provides a one-stop guide to OLED technology for the benefit of newcomers to the field of organic optoelectronics Comprehensively covers the luminescent properties of organic semiconductors and their development into OLED materials Offers practical information on OLED fabrication and their applications in solid-state lighting and displays, making this essential reading for optoelectronics engineers and materials scientists

Organic Light Emitting Diodes

Organic Light Emitting Diodes Book
Author : Jan Kalinowski
Publisher : CRC Press
Release : 2018-10-03
ISBN : 1420030647
Language : En, Es, Fr & De

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Book Description :

Organic Light Emitting Diodes: Principles, Characteristics, and Processes presents recent developments in organic electroluminescence and their application to light emitting diodes. In six chapters and complete with an extensive set of references, it describes and illustrates the physical principles of organic LEDs and their electrical and optical characteristics with a wide range of examples and practical studies. The author presents a unified approach to the description and functioning of organic LEDs, based on a comprehensive background of relevant physical processes and provides a clear foundation for the prediction and design of new improved electroluminescent devices.

Organic Light Emitting Diodes

Organic Light Emitting Diodes Book
Author : Mingsheng Xu
Publisher : LAP Lambert Academic Publishing
Release : 2010-06
ISBN : 9783838303642
Language : En, Es, Fr & De

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Book Description :

Organic light-emitting diode (OLED) technology is used in a variety of display applications, ranging from cell phones and MP3 to prototype TVs, and holds great promise for the production of highly efficient large-area light sources and flat panel displays. It has the potential to become a multibillion-dollar industry within a few years. The biggest technical challenge for OLEDs is the limited lifetime associated with elevated temperatures and exposure to moisture. The guaranteed hours of operation (15,000 hr) is currently inadequate for most TVs and replacement of LCDs with the 60,000 hr half-life. This book, therefore, investigated the thermal-activated and moisture-induced degradation pathways of small molecule - based prototype OLEDs as well as interfacial electronic properties at the nanoscale level through real-time visualization. The results should help shed some lights on improving luminescence efficiency and lifetime of OLEDs, and should be especially useful to professionals in research and development of not only OLED technology but other organic electronics, or anyone else who may be interested in plastic electronics.

Organic Light Emitting Diode

Organic Light Emitting Diode Book
Author : Seung Hwan Ko
Publisher : IntechOpen
Release : 2011-07-27
ISBN : 9789533072739
Language : En, Es, Fr & De

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Book Description :

This book contains a collection of latest research developments on Organic light emitting diodes (OLED). It is a promising new research area that has received a lot of attention in recent years. Here you will find interesting reports on cutting-edge science and technology related to materials, fabrication processes, and real device applications of OLEDs. I hope that the book will lead to systematization of OLED study, creation of new research field and further promotion of OLED technology for the bright future of our society.

Organic Light Emitting Devices

Organic Light Emitting Devices Book
Author : Klaus Müllen,Ullrich Scherf
Publisher : John Wiley & Sons
Release : 2006-05-12
ISBN : 3527607234
Language : En, Es, Fr & De

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Book Description :

This high-class book reflects a decade of intense research, culminating in excellent successes over the last few years. The contributions from both academia as well as the industry leaders combine the fundamentals and latest research results with application know-how and examples of functioning displays. As a result, all the four important aspects of OLEDs are covered: - syntheses of the organic materials - physical theory of electroluminescence and device efficiency - device conception and construction - characterization of both materials and devices. The whole is naturally rounded off with a look at what the future holds in store. The editor, Klaus Muellen, is director of the highly prestigious MPI for polymer research in Mainz, Germany, while the authors include Nobel Laureate Alan Heeger, one of the most notable founders of the field, Richard Friend, as well as Ching Tang, Eastman Kodak's number-one OLED researcher, known throughout the entire community for his key publications.

Organic Light Emitting Devices

Organic Light Emitting Devices Book
Author : Jai Singh
Publisher : BoD – Books on Demand
Release : 2012-11-14
ISBN : 9535108506
Language : En, Es, Fr & De

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Book Description :

This book describes the state-of-the-art advancement in the field of organic electroluminescence contributed by many researchers with internationally established expertise in the field. It includes original contributions on the synthesis of suitable organic materials, fabrication of organic light emitting devices (OLEDs) and organic white light emitting devices (WOLEDs), characterization of these devices and some designs for optimal performance. All chapters are self-sufficient in presenting their contents. The cost effective chemical technology offers many exciting possibilities for OLEDs and organic solar cells (OSCs) to be futuristic solutions for lighting and power generation. A common flexible substrate can be used to fabricate OLEDs on one side facing a room and OSCs on the other side facing the sun. The device thus fabricated can generate power in the day time and light a room/house at night. The book covers developments on OLEDs, WOLEDs and briefly on OSCs as well.

Transition Metal Oxides in Organic Light Emitting Diodes

Transition Metal Oxides in Organic Light Emitting Diodes Book
Author : N.A
Publisher : Cuvillier Verlag
Release : 2010-10-15
ISBN : 373693484X
Language : En, Es, Fr & De

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Book Description :

Organic light emitting diodes (OLEDs) exhibit several specific properties such as an extremely thin design and a wide viewing angle, making them favorable for the application in display technology and general lighting. The development of OLEDs is strongly driven by the prospect of low-cost production of largearea applications in the future. Accordingly, their performance was considerably enhanced in terms of efficiency and lifetime over the past years. The introduction of transition metal oxides (TMOs) in OLEDs is regarded as a promising concept for further improving their properties due to their technological compatibility with organic layers and their high thermal stability. The first results from the insertion of TMOs in OLEDs indicate their versatile application as neat functional layers and electrochemical dopants of organic semiconductors. On the other hand, the knowledge of their electronic properties and the mode of operation in OLEDs is very limited so far. In this context, it becomes apparent that fundamental mechanisms such as the electrochemical doping of organic semiconductors or the charge generation in interconnecting units of stacked OLEDs are not yet completely clarified. Thus, this work focuses on the physical and technological correlations arising from the application of transition metal oxides in organic light emitting diodes. First, the electronic structure of molybdenum oxide (MoO3) and tungsten oxide (WO3) is analyzed by photoelectron spectroscopy and Kelvin probe. It is demonstrated that both TMOs exhibit comparably deep-lying energy levels. Moreover, their electronic structure indicates them as intrinsically n-doped semiconductors. The functional principle of the efficient hole injection by neat layers of TMO is then studied by the examination of the interfaces between the TMO and its adjacent layers. As a result, a new model of hole injection by thin TMO layers is developed. The concept of electrochemical doping in OLEDs represents a very important technique to improve their overall efficiency. For that reason, the suitability of MoO3 as p-type dopant and Cs2CO3 (cesium carbonate) as n-type dopant of organic wide band gap semiconductors is studied,respectively. First, the impact of electrochemical doping on the electrical, optical and morphological properties is analyzed. The focus, however, is on the determination of the doping concentration dependent charge carrier densities. Measurement techniques, known from the world of inorganic semiconductors, such as capacitance voltage measurements on metal-insulator-semiconductor structures or the direct analysis of the space charge regionin doped semiconductors at the metallic electrode are applied for the determination of the densities and compared with each other. The study reveals an approximately linear increase of the charge carrier density with higher doping concentrations as a general result. At the same time, the doping efficiency of MoO3 is unexpectedly low and under five percent on average. The stacking of several light emitting units on top of each other is known to increase the lifetime of organic devices. Therefore, it is important to reveal the functional principle of the charge generation layers (CGL) as the interconnecting units of the stacked OLEDs. Besides the analysis of a complementarily doped homojunction-CGL, the role of neat layers of TMO in CGLs is investigated. The mechanism of charge generation between doped layers is explained by the formation of a space charge region. On the other hand, it is demonstrated that the actual charge generation in interconnecting units using transition metal oxides occurs at the interface between the TMO and the adjacent hole transporting layer. Finally, the investigations of the physical aspects in this work allowed for the realization of the first organic p-i-n homojunction device which operates both as violet light emitting diode and visible blind photodiode.

White Organic Light Emitting Diodes with Thermally Activated Delayed Fluorescence Emitters

White Organic Light Emitting Diodes with Thermally Activated Delayed Fluorescence Emitters Book
Author : Dongxiang Luo
Publisher :
Release : 2018
ISBN :
Language : En, Es, Fr & De

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Book Description :

Recently, thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs) have attracted both academic and industrial interest due to their extraordinary characteristics, such as high efficiency, low driving voltage, bright luminance, lower power consumption, and potentially long lifetime. In this chapter, various approaches to realize white OLEDs (WOLEDs) with TADF emitters have been introduced. The recent development of WOLEDs based on all TADF emitters, WOLEDs based on TADF and conventional fluorescence emitters, and WOLEDs based on TADF and phosphorescence emitters is highlighted. Particularly, the device structures, design strategies, working mechanisms, and electroluminescent processes of the representative high-performance WOLEDs with TADF emitters are reviewed. Moreover, challenges and opportunities for further enhancement of the performance of WOLEDs with TADF emitters are presented.

High performance Organic Light Emitting Diodes

High performance Organic Light Emitting Diodes Book
Author : Kody George Klimes
Publisher :
Release : 2019
ISBN :
Language : En, Es, Fr & De

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Book Description :

Organic electronics have remained a research topic of great interest over the past few decades, with organic light emitting diodes (OLEDs) emerging as a disruptive technology for lighting and display applications. While OLED performance has improved significantly over the past decade, key issues remain unsolved such as the development of stable and efficient blue devices. In order to further the development of OLEDs and increase their commercial potential, innovative device architectures, novel emissive materials and high-energy hosts are designed and reported. OLEDs employing step-wide graded-doped emissive layers were designed to improve charge balance and center the exciton formation zone leading to improved device performance. A red OLED with a peak efficiency of 16.9% and an estimated LT97 over 2,000 hours at 1,000 cd/m2 was achieved. Employing a similar structure, a sky-blue OLED was demonstrated with a peak efficiency of 17.4% and estimated LT70 over 1,300 hours at 1,000 cd/m2. Furthermore, the sky-blue OLEDs color was improved to CIE coordinates of (0.15, 0.25) while maintaining an efficiency of 16.9% and estimated LT70 over 600 hours by incorporating a fluorescent sensitizer. These devices represent literature records at the time of publication for efficient and stable platinum phosphorescent OLEDs. A newly developed class of emitters, metal-assisted delayed-fluorescence (MADF), are demonstrated to achieve higher-energy emission from a relatively low triplet energy. A green MADF device reaches a peak efficiency of 22% with an estimated LT95 over 350 hours at 1,000 cd/m2. Additionally, a blue charge confined OLED of PtON1a-tBu demonstrated a peak efficiency above 20%, CIE coordinated of (0.16, 0.27), and emission onset at 425 nm. High triplet energy hosts are required for the realization of stable and efficient deep blue emission. A rigid "M"-type carbazole/fluorene hybrid called mDCzPF and a carbazole/9-silafluorene hybrid called mDCzPSiF are demonstrated to have high triplet energies ET=2.88 eV and 3.03 eV respectively. Both hosts are demonstrated to have reasonable stability and can serve as a template for future material design. The techniques presented here demonstrate alternative approaches for improving the performance of OLED devices and help to bring this technology closer to widespread commercialization.

Organic Light Emitting Diode 118 Success Secrets 118 Most Asked Questions on Organic Light Emitting Diode What You Need to Know

Organic Light Emitting Diode 118 Success Secrets   118 Most Asked Questions on Organic Light Emitting Diode   What You Need to Know Book
Author : George McIntyre
Publisher : Emereo Publishing
Release : 2014-10-25
ISBN : 9781488863936
Language : En, Es, Fr & De

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Book Description :

The best Organic Light-Emitting Diode Guide you will ever read. There has never been a Organic Light-Emitting Diode Guide like this. It contains 118 answers, much more than you can imagine; comprehensive answers and extensive details and references, with insights that have never before been offered in print. Get the information you need--fast! This all-embracing guide offers a thorough view of key knowledge and detailed insight. This Guide introduces what you want to know about Organic Light-Emitting Diode. A quick look inside of some of the subjects covered: Plasma displays - Contrast ratio, List of computing and IT abbreviations - O, Trinitron - End of Trinitron, Pioneer (company) - History, Plasma display - General characteristics, Organic Light Emitting Transistor, Head-mounted display - Aviation and Tactical / ground, Carbon nanotubes in photovoltaics - Single wall carbon nanotubes as light harvesting media, Portable media player - Typical features, Sony XEL-1, Ingo Maurer - Life, Computer monitor Organic light-emitting diode, Semiconductor devices - Semiconductor device materials, Plasma displays - General characteristics, I C - Applications, International CES - Products that debuted at CES, Creative Zen - ZEN MicroPhoto, Remote Touch - Vehicles, Iriver - Current, Liquid crystal display television, Consumer Electronics Show - Products that debuted at CES, Field emission display - OLED, Optical camouflage - In research, OLED - Advantages, OLED - Working principle, 3D display - Head-mounted displays, Conductive polymer - History, Handheld television, Ithaca College - Alumni, Iriver clix - Second generation, Thin-film transistor - Applications, Plasma display panel - General characteristics, Tris(bipyridine)ruthenium(II) chloride - Photochemistry of [Ru(bpy)3]2+, Asian Americans - Science and technology, F. J. Duarte - Organic media, Home theater system - Later developments, and much more...

Organic Light Emitting Materials and Devices

Organic Light Emitting Materials and Devices Book
Author : Zhigang Li,Zhigang Rick Li,Hong Meng
Publisher : CRC Press
Release : 2006-09-12
ISBN : 1420017063
Language : En, Es, Fr & De

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Book Description :

New advances offer flexible, low-cost fabrication methods for light-emitting materials, particularly in display technologies. As researchers continue to develop novel applications for these materials, feasible solutions for large-scale manufacturing are increasingly important. Organic Light-Emitting Materials and Devices covers all aspects o