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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Journal ArticleDOI
Co-doping method used to improve the charge transport balance in solution processed OLEDs
TL;DR: In this paper, a co-doping method was used to improve the current efficiency of solution-processed organic light-emitting diodes (OLEDs) by changing the ratio of two thermally activated delayed fluorescent (TADF) emitters.
Proceedings ArticleDOI
Electro-thermal effects in large area white-organic light emitting diodes
TL;DR: In this paper, a white-OLED with 16 cm2 emitting area was made with wide color temperature range (3200 K to 10500K) and color rendering index near 90.
Journal ArticleDOI
P‐169: Light‐Blue Thermally Activated Delayed Fluorescent Emitters Realizing a High External Quantum Efficiency of 25%
Journal ArticleDOI
Solid-State Lighting Using Side-by-Side White Phosphorescent Organic Light-Emitting Diodes
TL;DR: In this paper , the authors demonstrate a method for side-by-side positioning of monochromatic blue and yellow phosphorescent OLED stripes that are combined to create tunable white light, using a high-resolution mechanical peel-off patterning method.
Journal ArticleDOI
Electroluminescence from impact excitation and carrier injection processes in a single device
TL;DR: In this paper, a high field electroluminescent device having two light emitting mechanisms (direct impact excitation and carrier recombination) was fabricated in order to improve the luminous efficiency.
References
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Organic Electroluminescent Diodes
Ching Wan Tang,Steven A Vanslyke +1 more
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Journal ArticleDOI
Very high-efficiency green organic light-emitting devices based on electrophosphorescence
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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.