Highly efficient host materials for blue phosphorescent oleds timeofflightchao tang, ran bi, youtian tao, fangfang wang, xudong cao, shifan wang, tao jiang, cheng zhong, hongmei zhang, and wei huang experimental general information. Highly efficient oleds with phosphorescent materials johnson. Highly efficient oleds with phosphorescent materials wiley online. Cationic iridium complexes are promising phosphorescent dopants for solutionprocessed organic lightemitting didoes oleds and counteranion control has emerged as a facile approach to tailor their properties for highperformance devices. Highly efficient white oleds for lighting applications. S1 supporting information pyridinecontaining bipolar host materials for highly efficient blue phosphorescent oleds shijian su,, hisahiro sasabe, takashi takeda, and junji kido, optoelectronic industry and technology development association, bunkyoku, tokyo 1120014, japan and. Highly efficient green and red phosphorescent oleds using. The researchers say that the compound platform they created can lead to efficient and costeffective oled emitters, and also offer a special molecular geometry that can enable freedomofdesign for developers. An electrontransporting triazole tz and hole transporting carbazole cz moieties were introduced into the fluorene structure via a suzuki coupling reaction. Highly efficient oleds with phosphorescent materials. Sep 09, 2011 applications of platinum complexes as phosphorescent emitters in high efficiency organic lightemitting diodes oleds were shortly discussed in this paper. Highly efficient phosphorescent lightemitting diodes by. Novel host material for highly efficient blue phosphorescent oleds. However, despite recent advances in the coordination and organometallic chemistry of gold, only few compounds have been successful in highperformance devices.
Highly efficient red phosphorescent osmiumii complexes. Introductionelectronic structure and energy transfer in guesthost systemsluminescence properties of phosphorescent and fluorescent materialsenergy. Supporting information materials for blue phosphorescent oleds. Host materials for phosphorescent emitters general requirements. This technology is currently under development by many industrial and academic research groups. Whether youve loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. Highperformance skyblue phosphorescent organic light. Highly efficient orange and warm white phosphorescent oleds based on a host material with a carbazolefluorenyl hybrid. This new monograph on oleds joins a small but growing number of books on the subject, including a 2006 publication from wileyvch. These compounds seem to be phosphorescent emitters, based on copper and silver atoms. Phosphorescent organic lightemitting diodes pholed are a type of organic lightemitting.
School of optoelectronic information, university of electronic science and technology of china uestc, chengdu 610054 china, fax. An effective thermally activated delayed fluorescence host material for highly efficient blue phosphorescent. Highly efficient oleds with phosphorescent materials book. Currently, organic lightemitting diodes oleds have reached the stage of commercialization, and there has been an intense drive to use them in various applications from small and mediumsized mobile devices to illumination equipment and large television screens. Highly efficient organic lightemitting diodes from delayed.
In january 2008 sony announced the release of the first organic lightemitting diode oledbased television figure 1 into the u. Two novel 1,3,5triazine derivatives were used as effective host materials. Numerous and frequentlyupdated resource results are available from this search. We demonstrate the use of screen printing in the fabrication of highly efficient phosphorescent polymer organic lightemitting devices oleds based on a greenemitting irppy 3 and a host polymer pvk. Platinum complexes as phosphorescent emitters in highly. The oled was focused on practical use, after tang et al.
Supporting information materials for blue phosphorescent. Goldiii complexes are emerging as promising phosphorescent emitters for high efficiency organic lightemitting diodes oleds. A series of oxadiazoletype anions, 35phenyl1,3,4oxadiazol2ylbenzen. Highly phosphorescent biscyclometalated iridium complexes. Highly efficient oleds with phosphorescent materials solid. Materials scientists and chemists consider in turn the three aspects of organic lightemitting diodes oleds. Phosphorescent organic lightemitting diodes pholed are a type of organic lightemitting diode oled that use the principle of phosphorescence to obtain higher internal efficiencies than fluorescent oleds. Dec 12, 2012 one successful way of enhancing the efficiency of organic lightemitting diodes oleds is to incorporate additional phosphorescent metalorganic molecules that are powered by the normally non. An effective thermally activated delayed fluorescence host material. Front matter highly efficient oleds with phosphorescent. Highly efficient phosphorescent lightemitting diodes by using new host material.
In this paper, two oled device concepts are introduced. It is revealing that of the thirtythree contributors, over a quarter are from china, with. Key recent studies on highly efficient blue, green, red and white phosphorescent oleds based on pt complexes are presented in terms of efficiency and color quality. Highly efficient oleds with phosphorescent materials request pdf.
A versatile efficient onestep approach for carbazolepyridine hybrid molecules. Phosphorescent organic light emitting diodes use the principle of electrophosphorescence to convert electrical energy in an oled into light in a highly efficient manner, with the internal quantum efficiencies of such devices approaching 100% when fluorescent materials are strictly. Development of red exciplex for efficient oleds by. Other readers will always be interested in your opinion of the books youve read. Download it once and read it on your kindle device, pc, phones or tablets. We investigated highly efficient green and red phosphorescent oleds. More than ten contributions cover all areas from theory and basic principles, to. Regardless of the efficiency limitation, the fluorescent materials take. Highly efficient and stable organic lightemitting diodes. Now his research activities focus upon characterization of emitter materials, transition metal complexes, and theory and development of electroluminescent.
May 18, 2015 highly efficient and stable organic lightemitting diodes with a greatly reduced amount of phosphorescent emitter. First nborylated emitters displaying highly efficient. Read an excerpt chapter 01 pdf preface pdf table of contents pdf index pdf highly efficient oleds with phosphorescent materials. Idemitsu and toray has been collaborating on oled material development since 2017. Highly efficient oleds have recently been realized without the use of heavy.
Oct 17, 2007 highly efficient oleds with phosphorescent materials. Reliable information about the coronavirus covid19 is available from the world health organization current situation, international travel. Applications of platinum complexes as phosphorescent emitters in high efficiency organic lightemitting diodes oleds were shortly discussed in this paper. Pyridinecontaining bipolar host materials for highly. The actualization of highly efficient fullcolor and white organic lightemitting diodes oleds in a simple and unified device architecture using host materials that are suitable for red, green, and blue dopants has been quite a challenge. Highly efficient oleds with phosphorescent materials hartmut yersin this brandnew monograph on organic light emitting diodes, edited by a pioneer, and written by frontline researchers from academia and industry, provides access to the latest findings in this rapidly growing field. Kidopyridinecontaining bipolar host materials for highly efficient blue phosphorescent oleds. One successful way of enhancing the efficiency of organic lightemitting diodes oleds is to incorporate additional phosphorescent metalorganic molecules that are powered by the normally non.
Highly efficient phosphorescent polymer oleds fabricated. The device uses a tadf emitter combined with red fluorescent materials which likely means this is a hyperfluorescence device. We incorporate pbd in the polymer host as an electrontransporting dopant and. Highly efficient phosphorescent polymer oleds fabricated by. Among the topics are transparent conducting thin films for oleds, iridium and platinum complexes for oleds, phosphorescent oleds for solidstate lighting, charge carrier mobility in amorphous organic semiconductors. Tetradentate platinumii complexes for highly efficient. For compound sacbm, fabrication of green emitting oled gave cie chromaticity of 0. Highly efficient organic lightemitting diodes from. Second, a path towards highly efficient, longlived deep blue systems is shown.
The researchers say that the compound platform they created can lead to efficient and costeffective oled emitters, and also offer a special molecular geometry that. Sn formation in host tn formation in host sn formation in dopant. Highly efficient skyblue phosphorescent oleds were obtained when employing tpsif as the host and iridiumiii bis4,6difluorophenylpyridinaton,c 2. Organic lightemitting diode oled devices have received much attention, because they are expected to be a next generation display and light source, thanks to lightweight and flexible organic materials. Here, we disclose the synthesis of a new phosphorescent. Ideal hostguest system for emission in phosphorescent oleds with only 1% guest doping condition for efficient energy transfer have been demonstrated in the present investigation. Critical role played by the phosphorescent iriii dendrimers. Oclcs webjunction has pulled together information and resources to assist library staff as they consider how to handle. We use cookies to offer you a better experience, personalize content, tailor advertising, provide social media features, and better understand the use of our services. This monograph on organic light emitting diodes, edited by a pioneer, and written by frontline researchers from academia and industry, provides access to the latest findings in this rapidly growing field. However, formatting rules can vary widely between applications and fields of interest or study. Read an excerpt table of contents pdf index pdf preface pdf chapter 01 pdf highly efficient oleds with phosphorescent materials. They are efficient and require a small amount of power. Ultimately the efficiencies of fluorescent tubes should be reached or even excelled, a goal which could already be achieved in the past for green oleds.
Construction of highly efficient carbazol9ylsubstituted benzimidazole bipolar hosts for blue phosphorescent lightemitting diodes. The high bipolar nature of the host is critical to this kind of doping system. Construction of highly efficient carbazol9ylsubstituted. Four isomers of carbazol9ylsubstituted 1,2diphenylbenzimidazole at 7, 6, 5, and 4 positions, named as 1cbzbiz, 2cbzbiz, 3cbzbiz, and 4cbzbiz, respectively, have been synthesized.
Suitable energy level is beneficial to efficient hosttoguest energy transfer. Holeelectron recombination, aka exciton formation reineke, s baldo, m. For improving the oled efficiency, there is a continuous trend of shifting research directions from fluorescent2 to phosphorescent materials. There is also a newer type of oleds under development called phosphorescent organic light emitting diodes pholed which has efficiencies approaching 100%. Highly efficient oleds with phosphorescent materials yersin, hartmut on. Like all types of oled, phosphorescent oleds emit light due to the. Pyridinecontaining bipolar host materials for highly efficient blue phosphorescent oleds shijian su,, hisahiro sasabe, takashi takeda, and junji kido, optoelectronic industry and technology development association, bunkyoku, tokyo 1120014, japan and. Novel host material for highly efficient blue phosphorescent. Highly efficient and stable organic lightemitting diodes with a greatly reduced amount of phosphorescent emitter.
Pt1ptzbased sky blue organic lightemitting diode oled demonstrates a maximum external quantum efficiency eqe of 14. Maa simple carbazolenbenzimidazole bipolar host material for highly efficient blue and single layer white phosphorescent organic light. Materials, devices and applications woodhead publishing series in electronic and optical materials book 36 kindle edition by buckley, alastair. First, classical phosphorescent green carbene emitters with unsurpassed lifetime, combined with low voltage and high efficiency are presented and the associated optimized oled stacks are explained. Moe key laboratory for nonequilibrium synthesis and modulation of condensed matter, department of chemistry, school of science, state key laboratory for mechanical behavior of materials, xian jiaotong. Highly phosphorescent biscyclometalated iridium complexes containing benzoimidazolebased ligands. Read highly efficient organic lightemitting diodes from thermally activated delayed fluorescence using a sulfonecarbazole host material, organic electronics on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. More than ten contributions cover all areas from theory and basic principles, to different emitter materials and applications in production. Highly efficient oleds with phosphorescent materials wileyvch. Solutionprocess fabrication of oleds is an exceptionally rapidly evolving.
Highly efficient skyblue phosphorescent oleds were obtained when employing tpsif as the host and iridium. Integrated oled substrates mark taylor exploratory markets and technologies group corning incorporated january 28, 2015. Towards highly efficient tadf yellowred oleds fabricated by. Jan 01, 2015 read highly efficient organic lightemitting diodes from thermally activated delayed fluorescence using a sulfonecarbazole host material, organic electronics on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Over the past decades, much research has been spent on finding suitable materials to realize highly efficient monochrome and white oleds. Herein, a series of thioxanthene and 9phenylcarbazole hybrids were. An ideal universal host for highly efficient fullcolor. For the fabrication of efficient phosphorescent oleds, the transition metal complex is typically used as emitting guest in a host material to avoid triplettriplet annihilation or quenching effects associated with the relatively long excited state lifetimes. Integrated oled substrates us department of energy. Highly efficient orange and warm white phosphorescent. Universal display corporation, one of the oled materials companies, holds a number of patents. Use features like bookmarks, note taking and highlighting while reading organic lightemitting diodes oleds. Highly efficient oleds with phosphorescent materials edited by hartmut yersin wiley. Molecular engineering of iridium complexes and their application in organic light emitting devices pages.
Highly efficient organic lightemitting diodes from thermally. White organic lightemitting diodes oleds are ultrathin, largearea light sources made from organic semiconductor materials. Idemitsu kosan and toray industries announced that the companies have jointly developed a red oled device that is the worlds most efficient emitter at 46 cda. Critical role played by the phosphorescent iriii dendrimers in solutionprocessed highly efficient oleds authors. Highly efficient green solution processable organic light. An oled organic light emitting diode, which emits light at a specific wavelength from electrons and electron holes by applying voltage to the organic thin film placed between anode and cathode, is a nextgeneration electronic element for display and lighting. There is a strong emphasis on the special role played by the platinum group metal pgm complexes as dopants to improve critical lightemitting characteristics.
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