Herein, a series of thioxanthene and 9phenylcarbazole hybrids were. A series of highly efficient phosphorescent ir complexes with tunable emission colors over the whole visible range have been designed and synthesized based on furo3,2cpyridine ligand. Highly efficient blue phosphorescent oleds were fabricated by using this new phosphor. Phosphorescent materials based on organometallic complexes have been widely used in the emitting layer. Highly luminescent palladiumii complexes with submillisecond blue to green phosphorescent excited states. Holeelectron recombination, aka exciton formation reineke, s baldo, m. 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. Highly efficient green solution processable organic lightemitting.
Highly efficient skyblue phosphorescent oleds were obtained when employing tpsif as the host and iridiumiii bis4,6difluorophenylpyridinaton,c 2. Phosphorescent iridium complexes akira tsuboyama leading. Blue phosphorescent organic lightemitting diode pholed with a high maximum external quantum efficiency eqe of 26. Highly efficient organic lightemitting diodes with. Request pdf highly efficient oleds with phosphorescent materials introductionelectronic structure and energy transfer in guesthost systemsluminescence properties of phosphorescent and. Herein, we describe a novel and effective design strategy for tadf emitters which. Tetradentate platinumii complexes for highly efficient. We incorporate pbd in the polymer host as an electrontransporting dopant and. This work demonstrates that these tetradentate ptii complexes can act as efficient phosphorescent emitters for oled applications. We fabricated highly efficient organic lightemitting diodes oleds using the solution processible iridium complexes which have long alkyl or cycloalkyl substituents in an ancillary ligand as a host material and a red phosphorescent iridium complex as an emitting guest by spin coating method. Highly efficient red phosphorescent osmium ii complexes. Recently, highly efficient oleds with long operational stability have been demonstrated, which utilize materials with a small. Read an excerpt table of contents pdf index pdf preface pdf chapter 01 pdf highly efficient oleds with phosphorescent materials.
Pyridinecontaining bipolar host materials for highly. Photocatalysis and highly efficient psfoleds electronic. The development of universal host materials suitable for both phosphorescent and thermally activated delayed fluorescent tadf emitters is still a bottleneck for fabricating highly efficient fullcolor and white organic lightemitting diodes oleds with a simple device structure. Phosphorescent oleds with a structure of itomoo 3 hosthost. Highly efficient orangeemitting oleds based on phosphorescent platinumii complexes article in polyhedron 248. A universal host material with a simple structure for. In 1999, an efficient phosphorescent oled pholed using iridium.
Download citation in highly efficient oleds with phosphorescent materials this brandnew monograph on organic light emitting diodes, edited by a pioneer. By mainly varying the molecular structures of the cchelated blocks, the emission maxima of these complexes can be obviously tailored from 477 to 641 nm while keeping the considerable. Sn formation in host tn formation in host sn formation in dopant. Highly efficient solutionprocessed hostfree organic. Recent advances in organic lightemitting diodes based. Highly efficient inverted topemitting green phosphorescent organic lightemitting diodes on glass and flexible substrates e. Two pyridinecontaining bipolar host materials with high triplet. Each of the organic functional layers should own their favorable thermal and electrochemical stabilities with balanced charge transport to guarantee the whole device performance. Edge technology development headquarters, canon inc. In highly efficient oleds with phosphorescent materials. Highly efficient solutionprocessed thermally activated delayed. Tadf materials harness both singlet and triplet excitons to induce light. The maximum current and power efficiency values of. Highly efficient red phosphorescent osmium ii complexes for oled applications.
Pt1ptzbased sky blue organic lightemitting diode oled demonstrates a maximum external quantum efficiency eqe of 14. Pure organic room temperature phosphorescence rtp materials have attracted. Highly efficient oleds with phosphorescent materials. 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. A record high efficiency and reduced efficiency rolloff were achieved for blue phosphorescent oleds with novel bipolar host materials containing both carbazole electron donor and pyridine electron acceptor because of good confinement of triplet excitons on the guest molecules and improved carrier balance injected into the emissive layer. Highly efficient red phosphorescent oleds pholeds with a simple, organic, triplelayer structure was developed using the narrowbandgap fluorescent host material bis10hydroxybenzoh quinolinatoberyllium complex bebq2 and the deepred dopant tris1phenylisoquinolineiridium irpiq3. Highly efficient all phosphorescent white organic light. Highly efficient and airstable inverted organic light. Read an excerpt chapter 01 pdf preface pdf table of contents pdf index pdf highly efficient oleds with phosphorescent materials. Highly efficient solutionprocessed hostfree organic lightemitting diodes showing an external quantum efficiency of nearly 18% with a thermally activated delayed fluorescence. In this paper, we report on a highly efficient ioled with high storage stability in air. The device with dbfdms showed improved performance compared with that with 1,3di9.
Highly efficient orange and warm white phosphorescent. Highly efficient and stable organic lightemitting diodes with a. Goldiii complexes are emerging as promising phosphorescent emitters for highefficiency organic lightemitting diodes oleds. But the phosphorescent materials contain the rare heavy metal, such as iridium and platinum. Kim and coworkers had fabricated a series of phosphorescent oleds by utilizing the exciplex host system 11,12,14, which processed a low bias, high efficiency and low efficiency rolloff. Highly efficient red oleds using dcjtb as the dopant and. Among these functional materials, rational designed hole transport materials htm are one of the key factors in achieving high efficiency oleds. Our results show that highly efficient and stable pholeds can be realized by combining a. New generation of high efficient oled using thermally activated. Highly efficient green solution processable organic light. This was a milestone in the development of materials that for over twenty years have been heralded as the successor to liquid crystal displays. Highly efficient white organic lightemitting diodes with ultrathin emissive layers and a spacerfree structure. Pdf green inverted organic lightemitting diodes oleds based on a thermally activated delayed fluorescent tadf emitter. Now his research activities focus upon characterization of emitter materials, transition metal complexes, and theory and development of electroluminescent devices.
Usually, materials used for oleds are phosphorescent emitters such as. An external quantum efficiency of 20% from solution. Highly efficient red oleds using dcjtb as the dopant and delayed. Highly efficient white organic lightemitting diodes with. Highly efficient singlestack hybrid cool white organic lightemitting diodes oleds having blueyellowblue multiple emitting layers. By stacking two emissive layers emls with different charge transporting properties, effective charges as well as exciton confinements were achieved. Highly efficient phosphorescent organic lightemitting. Us6803720b2 highly stable and efficient oleds with a. Performances of the blue phosphorescent oleds are among the bestreported values. Highly efficient oleds with phosphorecent materials 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. In addition to the application as a blue emitter, nfbc is demonstrated to be a good host for phosphorescent dopants. Naphthalenebased host materials for highly efficient red phosphorescent oleds at low doping ratios. Naphthalenebased host materials for highly efficient red.
Highly efficient phosphorescent polymer oleds fabricated. His projects are awarded large fundings from the german research foundation, the volkswagen foundation as well as the federal ministry of education and research. Ancillary ligands in heteroleptic iridium complexes significantly influence the orientation of the transition dipole moments. Highly efficient singlestack hybrid cool white oled. The search for efficient materials for organic light emitting diodes is one of the most. Kippelen center for organic photonics and electronics cope, school of. Also, a highly efficient phosphorescent ioled with a low driving voltage has never been realized.
Chemistry of materials, accounts of chemical research, acs applied bio. Classroom resource material classroom resource materials art of. Highly efficient white oleds for lighting applications. Highly efficient blue and white phosphorescent oleds based. Rtp materials in oleds is still in its initial stage, because high efficiency and. Pdf nitrogen heterocyclecontaining materials for highly. By doping irtfpd 2 pic into 9, 9spirobifluoren2yldiphenylphosphine oxide sppo1, blue emission with a maximum efficiency of 41. Highly efficient fluoreneindolebased hole transport. A highly stable and efficient organic light emitting device with a phosphorescentdoped mixed layer architecture comprises an anode layer. Nitrogen heterocyclecontaining materials for highly efficient phosphorescent oleds with low operating voltage article pdf available october 2014 with 777 reads how we measure reads. Irppy 3, a homoleptic iridium complex, exhibits isotropic dipole orientation, whereas the heteroleptic ir complexes of ir ppy 2tmd show a highly preferred dipole orientation 78% in the horizontal direction. Highly efficient white oleds for lighting applications sven muranoa, markus burgharta, jan birnstock a.
But the phosphorescent materials contain the rare heavy metal, such as iridium and platinum, thus they must suffer from the high material cost. Highly efficient oleds with phosphorecent materials. An ideal universal host for highly efficient fullcolor. The efficiency and lifetime of fluorescent oleds have been reported to be improved by. Tadf materials harness both singlet and triplet excitons to induce. In this regard, in 2014 we proposed a structural design strategy that involved the merging of the. A highly stable and efficient organic light emitting device with a phosphorescent doped mixed layer architecture comprises an anode layer. Highly efficient red oleds using dcjtb as the dopant and delayed fluorescent exciplex as the host.
Highly efficient blue phosphorescent organic light. 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. We report highly efficient all phosphorescent white organic lightemitting diodes oleds with an excitonconfinement structure. However, despite recent advances in the coordination and organometallic chemistry of gold, only few compounds have been successful in highperformance devices. In january 2008 sony announced the release of the first organic lightemitting diode oledbased television figure 1 into the u. Highly efficient and stable organic lightemitting diodes. Highly efficient oleds with phosphorescent materials hartmut yersin on. Purely organic phosphorescence emitterbased efficient. Explore citation contexts and check if this article has been supported. These highly efficient oleds are generally manufactured using evaporative methods and are comprised of smallmolecule heteroleptic phosphorescent iridiumiii complexes blended with a host and. Highly efficient phosphorescent furo3,2cpyridine based. Photocatalysis and highly efficient psf oleds puikeong chow,a gang cheng,ab glenna so ming tong,a chensheng ma,c waiming kwok, d waihung ang,a clive yiksham chung,a chen yang,a feng wanga and chiming cheab. Pdf highly efficient inverted organic lightemitting diodes based. Highly efficient phosphorescent oleds with hostindependent and concentrationinsensitive properties based on a bipolar iridium complex tai peng, a guomeng li, a kaiqi ye, a chenguang wang, a shanshan zhao, a yu liu, a zhaomin hou b and yue wang a.