Journal ArticleDOI
Development of high performance OLEDs for general lighting
Hisahiro Sasabe,Junji Kido +1 more
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
Citations
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Journal ArticleDOI
Enhancing the electroluminescence of OLEDs by using ZnO nanoparticle electron transport layers that exhibit the Auger electron effect
TL;DR: In this article, the authors fabricated organic light-emitting diodes (OLEDs) with electron injection layers (EILs) and hole blocking layers (HBLs) made from different sized zinc oxide (ZnO) nanoparticles (NPs).
Journal ArticleDOI
Disentangling Multiple Effects on Excited-State Intramolecular Charge Transfer among Asymmetrical Tripartite PPI-TPA/PCz Triads.
Si-Rui Yang,Chen Cao,Chen Cao,Amjad Islam,Shanshan Sun,Ziqian Deng,Jiayu Li,Shao-Fei Ni,Qing-Xiao Tong,Ming-De Li +9 more
TL;DR: The results suggest that the electronic nature of moieties, asymmetrical tripartite structure and the distance of electron-hole of these triads as well as the polarity of solvent determine the lifetime of intramolecular charge transfer (ICT).
Journal ArticleDOI
A systematic review on 1,8-naphthalimide derivatives as emissive materials in organic light-emitting diodes
Sneha Kagatikar,Dhanya Sunil +1 more
TL;DR: In this paper , the synthesis and usage of vary substituted 1,8-naphthalimide (NI) frameworks as luminescent host, dopant, hole blocking and electron-transporting materials for OLEDs that emit not only red, orange, green and blue colors, but also function as white emitters, which can really have an impact on reducing the energy consumption.
Journal ArticleDOI
Efficient deep red phosphorescent OLEDs using 1,2,4-thiadiazole core-based novel bipolar host with low efficiency roll-off
TL;DR: In this paper, a series of 1,2,4-thiadiazole core-based bipolar materials were developed as the host matrixes for the deep red phosphorescent emitters tris(1-phenylisoqiunoline) iridium (Ir(piq)3) and [bis(2-methyldibenzo-[f,h]-quinoxaline) Ir(III)(acetylacetonate)] (ir(MDQ)2(acac)).
Journal ArticleDOI
A Methodological Study on Tuning the Thermally Activated Delayed Fluorescent Performance by Molecular Constitution in Acridine-Benzophenone Derivatives.
Rongjuan Yang,Qian Guan,Zhiyang Liu,Wei Song,Ling Hong,Tao Lei,Qiang Wei,Ruixiang Peng,Xi Fan,Ziyi Ge +9 more
TL;DR: Compared with the maximum external quantum efficiency (EQE) for BP-DPAC, organic light-emitting diodes (OLED) devices based on DPAC-BP- DPAC exhibited enhanced TADF properties with the highest maximum EQE of 18.67 %, owing to an additional diphenylacridine donor.
References
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Journal ArticleDOI
Organic Electroluminescent Diodes
Ching Wan Tang,Steven A Vanslyke +1 more
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Journal ArticleDOI
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.
Journal ArticleDOI
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.