Journal ArticleDOI
Development of high performance OLEDs for general lighting
Hisahiro Sasabe,Junji Kido +1 more
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TLDR
The first white organic light-emitting device (OLED) was developed in 1993, and the power efficiency and lifetime of this white OLED were reportedly only < 1 lm W−1 and < 1 day, respectively.Abstract:
Since the development of the first white organic light-emitting device (OLED) in 1993, twenty years have passed. The power efficiency and lifetime of this white OLED were reportedly only <1 lm W−1 and <1 day, respectively. However, recent rapid advances in material chemistry have enabled the use of white OLEDs for general lighting. In 2012, white OLED panel efficiency has reached 90 lm W−1 at 1000 cd m−2, and a tandem white OLED panel has realized a lifetime of over 100 000 hours. What is more important in OLEDs is to shed clear light on the new design products, such as transparent lighting panels and luminescent wallpapers. These fascinating features enable OLEDs as a whole new invention of artificial lighting. In this review, we would like to overview the recent developments of white OLED, especially three key elemental technologies related to material chemistry: (1) low operating voltage technology, (2) phosphorescent OLED technology and (3) multi-photon emission (MPE) device technology.read more
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Recent Research Trends for Improving the Stability of Organo/Inorgano Halide Perovskites
TL;DR: In this article , the authors focus on strategies to improve the lifetime and stability of perovskites such as core-shell structure, ligand exchange, and doping, and focus on methods to improve their lifetime, and stability.
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A multifunctional hole-transporter for high-performance TADF OLEDs and clarification of factors governing the transport property by multiscale simulation
Natsuo Nagamura,Hisahiro Sasabe,Hiroki Sato,Takahiro Kamata,Nozomi Ito,Suguru Araki,Shoki Abe,Yoshihito Sukegawa,Daisuke Yokoyama,Hironori Kaji,Junji Kido +10 more
TL;DR: In this paper , a record-breaking efficient (EQE: 22%) and long-living (LT50: 28,000 h@1000 nit) TADF OLED is realized by using a multifunctional hole-transporter.
Journal ArticleDOI
Aromatic Substituents for Prohibiting Side-Chain Packing and π-π Stacking in Tin-Cored Tetrahedral Stilbenoids
TL;DR: Tetrahedral structures comprising Sn-cored materials with five different types of substituents were synthesized in this paper and the energy levels of the highest occupied and lowest unoccupied molecular orbitals were measured to be 5.5-5.75 and 2.0-2.37 eV, respectively.
Journal ArticleDOI
Enhanced light extraction from organic light-emitting diodes by reducing plasmonic loss through graded photonic super-crystals
TL;DR: In this article, a planar organic light-emitting diode (OLED) is patterned with a graded photonic super-crystal (GPSC), by destroying the plasmonic resonance condition through graded patterns and scattering the surface polariton into the glass.
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Solution-processed multiple exciplexes via spirofluorene and S-triazine moieties for red thermally activated delayed fluorescence emissive layer OLEDs
Ting Xu,Ting Xu,Ting Xu,Guohua Xie,Taian Huang,He Liu,Xiaosong Cao,Yang Tang,Chuluo Yang,Chuluo Yang +9 more
TL;DR: In this article, a series of novel binary and ternary components of the exciplexes as the cohosts for a red thermally activated delayed fluorescence (TADF) dopant were investigated in the solution-processed OLEDs, where 1,3-bis[(4-tert-butylphenyl)-1,3,4-oxadiazolyl] phenylene (OXD-7) as a conventional acceptor, and 1, 3-bis(carbazol-9-yl)benzene (mCP)
References
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Journal ArticleDOI
Organic Electroluminescent Diodes
Ching Wan Tang,Steven A Vanslyke +1 more
TL;DR: In this article, a double-layer structure of organic thin films was prepared by vapor deposition, and efficient injection of holes and electrons was provided from an indium-tinoxide anode and an alloyed Mg:Ag cathode.
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Very high-efficiency green organic light-emitting devices based on electrophosphorescence
TL;DR: In this paper, the performance of an organic light-emitting device employing the green electrophosphorescent material, fac tris(2-phenylpyridine) iridium [Ir(ppy)3] doped into a 4,4′-N,N′-dicarbazole-biphenyl host was described.
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White organic light-emitting diodes with fluorescent tube efficiency
Sebastian Reineke,Frank Lindner,Gregor Schwartz,Nico Seidler,Karsten Walzer,Björn Lüssem,Karl Leo +6 more
TL;DR: An improved OLED structure which reaches fluorescent tube efficiency and focuses on reducing energetic and ohmic losses that occur during electron–photon conversion, which could make white-light OLEDs, with their soft area light and high colour-rendering qualities, the light sources of choice for the future.
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Charge Transport in Disordered Organic Photoconductors a Monte Carlo Simulation Study
Journal ArticleDOI
Management of singlet and triplet excitons for efficient white organic light-emitting devices
Yiru Sun,Noel C. Giebink,Hiroshi Kanno,Biwu Ma,Mark E. Thompson,Stephen R. Forrest,Stephen R. Forrest +6 more
TL;DR: This device challenges incandescent sources by exhibiting total external quantum and power efficiencies that peak at 18.7 ± 0.6 lm W-1, respectively, and two distinct modes of energy transfer within this device serve to channel nearly all of the triplet energy to the phosphorescent dopants, retaining the singlet energy exclusively on the blue fluorescent dopant.