Organic light emitting materials and devices xvii 20. When properly stacked, these materials result in a device that can achieve the required high efficiency and long lifetime. Research and development of organic materials and devices for electronic applications has become an increasingly active area. Device architecture and materials for organic lightemitting devices. Interfacial engineering at organic metal and organic inorganic contacts needs to be carefully taken into account for the design of a stable organic light emitting device oled.
Nanostructure and device architecture engineering for high. Device structure and electroluminescence performance of the three singlejunction oled devices with red, green and blueemitting polymers. Tandem device is an important architecture in fabricating high performance organic lightemitting diodes and organic photovoltaic cells. Cost, energy and emissions assessment of organic polymer. This book is a reprint of the manuscript entitled device architecture and mate. Organic light emitting materials and devices provides a single source of information covering all aspects of oleds, including the systematic investigation of organic light emitting materials, device physics and engineering, and manufacturing and performance measurement techniques. Organic light emitting diode material, process and. Materials chemistry and nanoscience top 50 articles of 2016. Organic lightemitting device how is organic lightemitting. This thesis also introduces an experimental technique to measure the spatial overlap of electrons and holes within an oleds emissive layer. This book describes the stateoftheart advancement in the field of organic electroluminescence contributed by many researchers with internationally established expertise in the field. As a control, two other organic lightemitting device oled structures were made. As a result, all the four important aspects of oleds are covered.
Organic light emitting diodes oleds universal display. New insights into organic light emitting devices uq espace. This second edition is a compilation of the advances made in recent years and of the challenges facing the future. Researchers have studied this new oled architecture with. Interfacial engineering at organicmetal and organicinorganic contacts needs to be carefully taken into account for the design of a stable organic light emitting device oled. Use of metagratings to enhance performance of organic thinfilm light emitting devices invited paper. The device efficiency has been improved drastically in recent a couple of decades.
This organic layer is situated between two electrodes. An independently controlled, threecolor, organic lightemitting device was constructed with a vertically stacked pixel architecture that allows for independent tuning of color, gray scale, and. A new lightemitting device architecture, the oled with fieldeffect electron transport, is demonstrated. Device structure and electroluminescence performance of the three singlejunction oled devices with red, green and blue emitting polymers. Device architecture and materials for organic light emitting devices focuses on the design of new device and material concepts for organic light emitting devices, thereby targeting high current densities and an improved control of the triplet concentration. Introduction organic lightemitting devices oleds have undergone rapid development since their invention almost 3 decades ago. As a control, two other organic light emitting device oled structures were made. The materials used in organic light emitting devices involve one of two.
Influences of connecting unit architecture on the performance of tandem organic light. The device includes an anode, a cathode, and an emissive layer disposed between the anode and the cathode. An independently controlled, threecolor, organic lightemitting device was constructed with a vertically stacked pixel architecture that allows for independent tuning of color, gray scale, and intensity. Aromatic hydrocarbon macrocycles for highly efficient organic. Pdf organic light emitting devices oleds are presented with particular emphasis on materials. On the properties and design of organic lightemitting devices. Materials, devices, and processing of organic lightemitting diodes brings together key topics across the field of organic lightemitting diodes oleds, from fundamental chemistry and physics to practical materials science and engineering aspects to design and manufacturing factors. Device architecture and materials for organic lightemitting devices focuses on the. When electricity is applied to an oled, under the influence of an electrical field, charge carriers holes and electrons migrate from the electrodes into the organic thin films. Jian li arizona state university for providing white light emitting compounds for use in singlelayer, singledopant white organic light emitting devices. In this device, three emitter layers with different carrier transport properties, each emitting blue, green, or red light. This book should attract the attention of materials scientists, synthetic chemists, solidstate. Multilayer white lightemitting organic electroluminescent. Energy level alignment at the various interfaces 1, as well as good adhesion and minimized defect states, are major concern in the interfacial phenomena of oled 2.
It is a promising new research area that has received a lot of attention in recent years. 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. Electroluminescence stability of organic lightemitting. The influence of constituent materials and the operational stability of charge generation layers cgls on the device characteristics of tandem organic lightemitting diodes oleds is reported upon. The emissive layer includes material having the structure. Organic and hybrid light emitting materials and devices xxiv sunday tuesday 23 25 august 2020.
Eml device architecture, oleds with improved efficiency characteristics are. Recent advances in white organic lightemitting materials and. Significant efforts also focus on materials for organic. Organic light emitting devices for lighting by joseph j. In the first, irppy 3 was replaced by alq 3, which has similar emission and absorption spectra, but no. A modern electrophosphorescent organic lightemitting device oled achieves quantitative electrooptical conversion by using multiple layers of molecular materials designed through role allotment for independent and specific functions. Device architecture and materials for organic lightemitting devices focuses on the design of new device and material concepts for organic lightemitting devices. Organic lightemitting device how is organic lightemitting device abbreviated. Preface this book is a reprint of the manuscript entitled device architecture and materials for organic lightemitting devices, that was submitted to the jury deciding.
Isolating degradation mechanisms in mixed emissive layer. A new light emitting device architecture, the oled with fieldeffect electron transport. Effective connecting architecture for tandem organic light. The influence of constituent materials and the operational stability of charge generation layers cgls on the device characteristics of tandem organic light emitting diodes oleds is reported upon. Nanostructure and device architecture engineering for highperformance quantumdot lightemitting diodes. Display and solidstate lighting are the most mature applications and, and products have been commercially available for several years as of this writing. Nearinfrared to visible organic upconversion devices. Quantumdotbased light emitting diodes qdleds have attracted considerable attention owing to their high color purity, sizedependent emission wavelength tunability, and solution processing ability as well as their inherent photo and thermalstability, making them suitable candidates for nextgeneration. List 1, 3, 1 nanoteccenter weiz forschungsgesellschaft mbh, franzpichlerstra.
Recent advances in white organic lightemitting materials. Organic light emitting devices for lighting the electrochemical. Device architecture and materials for organic light. Highefficiency fluorescent organic lightemitting devices. A unique, potentially innovative device architecture, i. Ep2259361a1 organic light emitting materials and devices. Nearinfrared to visible organic upconversion devices based. M is a metal having an atomic weight greater than 40, m is at least 1, n is at least zero, r. Materials for organic light emitting devices springerlink. The fabrication of colortunable organic lightemitting. Organic light emitting diodes devices or oleds are monolithic, solidstate devices that typically consist of a series of organic thin films sandwiched between two thinfilm conductive electrodes. Organic lightemitting diodes oleds occupy a significant niche in organic. A modern electrophosphorescent organic light emitting device oled achieves quantitative electrooptical conversion by using multiple layers of molecular materials designed through role allotment for independent and specific functions. Organic light emitting diode material, process and devices.
Organic light emitting device materials for displays. Herein, a novel all organic upconversion device architecture has been first proposed and developed by incorporating a nir absorption layer between the carrier transport layer and the emission layer. The present invention is directed to an organic light emitting device, comprising an anode, a cathode and an emissive layer disposed between the anode and the cathode, the emissive layer including a material having the structure. New materials and device designs for organic light. Accordingly, a common design strategy to improve oled lifetime is to reduce the density of these species by engineering an emissive layer architecture to achieve a broad exciton recombination zone. In this study, solutionprocessable carbazoletype host materials, 1,3bis33,6dinbutylcarbazol9ylphenylbenzene bczpph and 4,6bis33,6dinbutylcarbazol9ylphenylpyrimidine bczppm, were synthesized for use in phosphorescent organic light emitting devices oleds. Device architecture and materials for organic lightemitting devices focuses on the design of new device and material concepts for organic lightemitting devices, thereby targeting high current densities and an improved control of the triplet concentration. Organic lightemitting diodes oleds based on thermally. This has led to oscs and other organic device systems that are integrated with portable. Fluoropolymer anode stabilizer for organic light emitting. These efficiencies are comparable to stateoftheart phosphorescent organic lightemitting diodes oleds and the operational lifetimes of red and greenemitting qdleds have satisfied the requirements for use in commercial displays. Both host materials possess a high solubility in common organic solvents and high triplet energy to confine.
In this study, solutionprocessable carbazoletype host materials, 1,3bis33,6dinbutylcarbazol9ylphenylbenzene bczpph and 4,6bis33,6dinbutylcarbazol9ylphenylpyrimidine bczppm, were synthesized for use in phosphorescent organic lightemitting devices oleds. Here, the effect of exciton density on device degradation is analyzed in a. Organic lightemitting materials are great candidates for display and. Device architecture and materials for organic lightemitting. Degradation in organic light emitting devices oleds is generally driven by reactions involving excitons and polarons. The fabrication of colortunable organic lightemitting diode. This device architecture offers a unique platform to study the electronic properties of varying compositions of organic semiconductors and the resulting device performance. Organic electroluminescent devices are lightemitting diodes in which the active materials consist entirely of organic materials. Stacking multiple connecting functional materials in. Organic light emitting materials and devices iv organic. Aromatic hydrocarbon macrocycles for highly efficient. The results demonstrate the potential stability bene. This second edition is a compilation of the advances made in recent years and of the challenges facing the.
Herein, a novel allorganic upconversion device architecture has been first proposed and developed by incorporating a nir absorption layer between the carrier transport layer and the emission layer. Herein, a novel all organic upconversion device architecture has been first proposed and developed by incorporating a nir absorption layer between the carrier transport layer and the emission layer in heterostructured organic light emitting field effect transistors olefets. Oleds adds up in the stacked device indicating multi. Dec 19, 2017 organic light emitting materials and devices, second edition offers a comprehensive overview of the oled field and can serve as a primary reference for those needing additional information in any particular subarea of organic electroluminescence. Here you will find interesting reports on cuttingedge science and technology related to materials, fabrication processes, and real device applications of oleds. Device reflectivity as a simple rule for predicting the suitability of scattering foils for improved oled light extraction. Proceedings volume 8829 organic light emitting materials and devices xvii. Organic light emitting devices are selfemitting light source based on radiative decay of exciton generated by the carrier recombination on an organic molecule, and utilized for various applications. Device engineering aspects of organic lightemitting diodes oleds. The whole is naturally rounded off with a look at what the future holds in store. Us6687266b1 organic light emitting materials and devices. Both host materials possess a high solubility in common. The key element in making a high performance tandem device is the connecting materials stack, which plays an important role in electric field distribution, charge generation and charge injection.
Degradation in organic lightemitting devices oleds is generally driven by reactions involving excitons and polarons. Working principle and iridium based emitter materials stefan kappaun 1, christian slugovc 2 and emil j. This book contains a collection of latest research developments on organic light emitting diodes oled. Organic and hybrid light emitting materials and devices. An independently controlled, threecolor, organic light emitting device was constructed with a vertically stacked pixel architecture that allows for independent tuning of color, gray scale, and intensity. Although organic light emitting devices have found their way into the display industry, there. The 12layer device structure consists of sequentially stacked layers of metal oxide, amorphous organic, crystalline organic, and metal thin films deposited by a combination of thermal. The nearinfrared nir to visible upconversion devices have attracted great attention because of their potential applications in the fields of night vision, medical imaging, and military security. Influences of connecting unit architecture on the performance. Solutionprocessable carbazolebased host materials for. Fluoropolymer anode stabilizer for organic light emitting devices.
Solution processed, white emitting tandem organic light. Diamond and advanced films cosdaf, department of physics and materials science, city university of hong kong, hong kong sar p. New materials and device designs for organic lightemitting. Organic lightemitting materials and devices provides a single source of information covering all aspects of oleds, including the systematic investigation of organic lightemitting materials, device physics and engineering, and manufacturing and performance measurement techniques.
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