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. 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. Although organic light emitting devices have found their way into the display industry, there. It is a promising new research area that has received a lot of attention in recent years. Organic and hybrid light emitting materials and devices xxiv sunday tuesday 23 25 august 2020. Oleds adds up in the stacked device indicating multi.
Ep2259361a1 organic light emitting materials and devices. Organic light emitting diodes oleds universal display. List 1, 3, 1 nanoteccenter weiz forschungsgesellschaft mbh, franzpichlerstra. Organic light emitting diode material, process and devices. New insights into organic light emitting devices uq espace. Introduction organic lightemitting devices oleds have undergone rapid development since their invention almost 3 decades ago. This organic layer is situated between two electrodes. A new light emitting device architecture, the oled with fieldeffect electron transport. When properly stacked, these materials result in a device that can achieve the required high efficiency and long lifetime.
On the properties and design of organic lightemitting devices. 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. Tandem device is an important architecture in fabricating high performance organic lightemitting diodes and organic photovoltaic cells. 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. 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.
Use of metagratings to enhance performance of organic thinfilm light emitting devices invited paper. Degradation in organic light emitting devices oleds is generally driven by reactions involving excitons and polarons. Materials chemistry and nanoscience top 50 articles of 2016. Device reflectivity as a simple rule for predicting the suitability of scattering foils for improved oled light extraction. 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. Jian li arizona state university for providing white light emitting compounds for use in singlelayer, singledopant white organic light emitting devices. Nearinfrared to visible organic upconversion devices. Both host materials possess a high solubility in common organic solvents and high triplet energy to confine. 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. 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. Device engineering aspects of organic lightemitting diodes oleds. New materials and device designs for organic light.
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. Influences of connecting unit architecture on the performance of tandem organic light. The materials used in organic light emitting devices involve one of two. The whole is naturally rounded off with a look at what the future holds in store. This book contains a collection of latest research developments on organic light emitting diodes oled.
This thesis also introduces an experimental technique to measure the spatial overlap of electrons and holes within an oleds emissive layer. 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. This has led to oscs and other organic device systems that are integrated with portable. The fabrication of colortunable organic lightemitting diode. This book describes the stateoftheart advancement in the field of organic electroluminescence contributed by many researchers with internationally established expertise in the field. 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. Eml device architecture, oleds with improved efficiency characteristics are. 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.
Organic lightemitting device how is organic lightemitting. Device architecture and materials for organic lightemitting. Significant efforts also focus on materials for organic. Display and solidstate lighting are the most mature applications and, and products have been commercially available for several years as of this writing.
The fabrication of colortunable organic lightemitting. 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. 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. 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.
Research and development of organic materials and devices for electronic applications has become an increasingly active area. The device includes an anode, a cathode, and an emissive layer disposed between the anode and the cathode. Cost, energy and emissions assessment of organic polymer. Organic light emitting materials and devices iv organic. This device architecture offers a unique platform to study the electronic properties of varying compositions of organic semiconductors and the resulting device performance. 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.
A new lightemitting device architecture, the oled with fieldeffect electron transport, is demonstrated. Here you will find interesting reports on cuttingedge science and technology related to materials, fabrication processes, and real device applications of oleds. Researchers have studied this new oled architecture with. New materials and device designs for organic lightemitting. Multilayer white lightemitting organic electroluminescent. Electroluminescence stability of organic lightemitting.
Organic lightemitting device how is organic lightemitting device abbreviated. As a result, all the four important aspects of oleds are covered. 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. Materials for organic light emitting devices springerlink. Organic light emitting devices for lighting the electrochemical. This book is a reprint of the manuscript entitled device architecture and mate. Recent advances in white organic lightemitting materials and. Here, the effect of exciton density on device degradation is analyzed in a. Organic and hybrid light emitting materials and devices.
Device architecture and materials for organic lightemitting devices. 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. Aromatic hydrocarbon macrocycles for highly efficient organic. Device architecture and materials for organic lightemitting devices focuses on the. Proceedings volume 8829 organic light emitting materials and devices xvii. 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. Organic lightemitting diodes oleds occupy a significant niche in organic. 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. Organic light emitting device materials for displays.
Effective connecting architecture for tandem organic light. Isolating degradation mechanisms in mixed emissive layer. 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. This second edition is a compilation of the advances made in recent years and of the challenges facing the future. The results demonstrate the potential stability bene. Pdf organic light emitting devices oleds are presented with particular emphasis on materials. In this device, three emitter layers with different carrier transport properties, each emitting blue, green, or red light. Both host materials possess a high solubility in common. 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. 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. Organic electroluminescent devices are lightemitting diodes in which the active materials consist entirely of organic materials. Organic light emitting materials and devices xvii 20.
Device structure and electroluminescence performance of the three singlejunction oled devices with red, green and blue emitting polymers. 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. Organic light emitting devices for lighting by joseph j. Fluoropolymer anode stabilizer for organic light emitting. 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. The emissive layer includes material having the structure. Influences of connecting unit architecture on the performance.
Device architecture and materials for organic light. 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. Organic light emitting diode material, process and. 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. 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. In the first, irppy 3 was replaced by alq 3, which has similar emission and absorption spectra, but no.
Nanostructure and device architecture engineering for highperformance quantumdot lightemitting diodes. Solutionprocessable carbazolebased host materials for. As a control, two other organic light emitting device oled structures were made. Stacking multiple connecting functional materials in. Aromatic hydrocarbon macrocycles for highly efficient. The device efficiency has been improved drastically in recent a couple of decades. Degradation in organic lightemitting devices oleds is generally driven by reactions involving excitons and polarons. 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.
Organic lightemitting diodes oleds based on thermally. 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. A unique, potentially innovative device architecture, i. 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. Working principle and iridium based emitter materials stefan kappaun 1, christian slugovc 2 and emil j. Organic lightemitting materials are great candidates for display and. This second edition is a compilation of the advances made in recent years and of the challenges facing the.
Highefficiency fluorescent organic lightemitting devices. 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. Nanostructure and device architecture engineering for high. As a control, two other organic lightemitting device oled structures were made. Diamond and advanced films cosdaf, department of physics and materials science, city university of hong kong, hong kong sar p.
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