Featured
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Article
| Open Access
Key requirements for ultraefficient sensitization in hyperfluorescence organic light-emitting diodes
Moderately efficient TADF emitters can play the role of surprisingly good sensitizers in hyperfluorescent blue organic light-emitting diodes.
- Kleitos Stavrou
- , Larissa G. Franca
- & Andrew P. Monkman
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Article |
Enhancing the efficiency and stability of blue thermally activated delayed fluorescence emitters by perdeuteration
Molecular perdeuteration of thermally activated delayed fluorescence emitters improves the performance of blue organic light-emitting diodes, enabling a peak external quantum efficiency of 33.1% and a device lifetime to reach 80% of initial luminance of over 1,300 h.
- Tianyu Huang
- , Qi Wang
- & Lian Duan
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Review Article |
Body-conformable light-emitting materials and devices
The progress made in developing light-emitting technologies that are wearable, attachable or implantable is reviewed and potential applications and challenges are discussed.
- Zhitao Zhang
- , Yue Wang
- & Chunhai Fan
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Article |
Handwriting of perovskite optoelectronic devices on diverse substrates
A new approach enables handwriting high-performance perovskite optoelectronic devices with a common ballpoint pen on diverse substrates, including paper, textiles, plastics, rubber and common 3D objects in daily life.
- Junyi Zhao
- , Li-Wei Lo
- & Chuan Wang
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Article |
High-bandwidth perovskite photonic sources on silicon
Tailoring the composition of organic cations enables manipulating the recombination rates of perovskites. Optimized solution-processed perovskite emitters fabricated on silicon exhibit up to 42.6-MHz modulation bandwidth and 50-Mbps data rate.
- Aobo Ren
- , Hao Wang
- & Wei Zhang
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Article
| Open Access
Highly efficient polaritonic light-emitting diodes with angle-independent narrowband emission
The addition of a strong coupling layer allows polariton-based emission from red and green organic light-emitting diodes with high external quantum efficiency up to 10%, linewidth smaller than 20 nm and angle-independent emission, with spectral shifts smaller than 10 nm over a 60° angular tilt.
- Andreas Mischok
- , Sabina Hillebrandt
- & Malte C. Gather
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Article |
An efficient solid-solution crystalline organic light-emitting diode with deep-blue emission
A thin-film of crystalline organic semiconductors yields a bright, efficient deep-blue OLED.
- Peifu Sun
- , Dan Liu
- & Donghang Yan
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Article |
Anomalous circularly polarized light emission in organic light-emitting diodes caused by orbital–momentum locking
Circularly polarized light emitted from OLEDs exhibits opposite handedness depending on the propagation direction of the light. Switching the current flow in the OLED also switches the light handedness.
- Li Wan
- , Yizhou Liu
- & Binghai Yan
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News & Views |
Efficient emitters in the NIR-II window
Suppression of exciton–vibration coupling yields organic light-emitting diodes that emit at 1,000 nm in the NIR-II spectral region, which is important for biological imaging.
- Alessandro Minotto
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Article |
Efficient and stable one-micrometre-thick organic light-emitting diodes
One-micrometre-thick OLEDs with low operating voltages of 5.11 V, 3.55 V and 6.88 V at 1,000 cd cm–2 for red, green and blue devices, respectively, and long lifetimes (55,000 h, 18,000 h and 1,600 h, respectively) are realized.
- Guanhao Liu
- , Zhiyi Li
- & Ying Wang
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Article |
Efficient selenium-integrated TADF OLEDs with reduced roll-off
Green OLEDs based on BNSeSe offer high operational efficiency and reduced efficiency roll-off.
- Yu Xuan Hu
- , Jingsheng Miao
- & Chuluo Yang
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Bright short-wavelength infrared organic light-emitting devices
Organic LEDs based on acceptor–donor–acceptor molecules Y11, IDSe-4Cl and COTIC-4F are shown to be highly effective emitters of short-wave infrared light.
- Yuan Xie
- , Wansheng Liu
- & Yong Cao
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Article |
The role of host–guest interactions in organic emitters employing MR-TADF
This study reveals the importance of host–guest interactions for effective multiple-resonance thermally activated delayed fluorescence in organic light emitters.
- Xiugang Wu
- , Bo-Kang Su
- & Pi-Tai Chou
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Article |
Bright and stable light-emitting diodes made with perovskite nanocrystals stabilized in metal–organic frameworks
The use of metal–organic frameworks helps protect perovskite nanocrystals, resulting in bright, stable light-emitting diodes.
- Hsinhan Tsai
- , Shreetu Shrestha
- & Wanyi Nie
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Editorial |
Live long and prosper
Solution-processing of light-emitting devices is attracting much attention due to low manufacturing costs and access to new materials. In this month’s Focus issue we highlight some of the advances and challenges in the field.
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Q&A |
Trailblazing lasing
Nature Photonics spoke to Chihaya Adachi from the Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, about the potential merits of, and hurdles facing, the development of organic semiconductor lasers.
- David F. P. Pile
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Q&A |
Emitting organically
Franky So, from North Carolina State University, explains some hard truths for solution-processed emitters, but also that, fundamentally, there is no reason why OLEDS can’t ‘make it’.
- David F. P. Pile
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Comment |
Characterization of stability and challenges to improve lifetime in perovskite LEDs
Low stability of perovskite light-emitting diodes (PeLEDs) is the biggest obstacle to the commercialization of PeLED displays. Here, we cover the current status and challenges in analysing and improving the stability of PeLEDs and suggest some advice that will benefit the community to boost the operational lifetime of PeLEDs.
- Seung-Je Woo
- , Joo Sung Kim
- & Tae-Woo Lee
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Review Article |
Advances in solution-processed near-infrared light-emitting diodes
A summary of recent advances in the near-infrared light-emitting diodes that are fabricated by solution-processed means, with coverage of devices based on organic semiconductors, halide perovskites and colloidal quantum dots.
- Maria Vasilopoulou
- , Azhar Fakharuddin
- & Edward H. Sargent
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News & Views |
TADF sensitization targets deep-blue
Two independent studies employing the same narrowband deep-blue emitter, ν-DABNA, but different energy transfer schemes, achieve efficient and stable deep-blue electroluminescence.
- Dongdong Zhang
- & Lian Duan
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Letter |
Stable pure-blue hyperfluorescence organic light-emitting diodes with high-efficiency and narrow emission
Pure-blue organic LEDs with narrow emission and improved stability show promise for display applications.
- Chin-Yiu Chan
- , Masaki Tanaka
- & Chihaya Adachi
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Comprehensive defect suppression in perovskite nanocrystals for high-efficiency light-emitting diodes
Guanidinium doping is shown to enhance the operation of perovskite nanocrystal light-emitting diodes.
- Young-Hoon Kim
- , Sungjin Kim
- & Tae-Woo Lee
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Efficient and stable organic light-emitting devices employing phosphorescent molecular aggregates
A tetradentate Pd(ii) complex with near unity photoluminescent quantum yield is the basis of bright, long-lifetime organic LEDs.
- Linyu Cao
- , Kody Klimes
- & Jian Li
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Efficient and bright white light-emitting diodes based on single-layer heterophase halide perovskites
Heterophase CsPbI3 perovskite gives rise to bright white phosphor-free LEDs.
- Jiawei Chen
- , Jian Wang
- & Haibo Zeng
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Organic light emitters exhibiting very fast reverse intersystem crossing
An organic molecule, TpAT-tFFO, which is designed to support rapid reverse intersystem crossing allows the fabrication of efficient organic light-emitting diodes.
- Yoshimasa Wada
- , Hiromichi Nakagawa
- & Hironori Kaji
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Overcoming the energy gap law in near-infrared OLEDs by exciton–vibration decoupling
Pt(ii) complexes allow the fabrication of efficient near-infrared organic light-emitting diodes that operate beyond the 900 nm region.
- Yu-Chen Wei
- , Sheng Fu Wang
- & Pi-Tai Chou
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Editorial |
A question of certification
The certification of solar cells with exceptional performance is now common practice in order to ratify claims. Should similar schemes be introduced for other optoelectronic devices?
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Letter |
Triplet management for efficient perovskite light-emitting diodes
Careful harvesting of triplet excitons allows the realization of efficient green-emitting quasi-2D perovskite LEDs.
- Chuanjiang Qin
- , Toshinori Matsushima
- & Chihaya Adachi
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Letter |
Narrowband deep-blue organic light-emitting diode featuring an organoboron-based emitter
A blue emitter based on thermally activated delayed fluorescence is narrowband and efficient.
- Yasuhiro Kondo
- , Kazuki Yoshiura
- & Takuji Hatakeyama
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Article |
Efficient and stable single-layer organic light-emitting diodes based on thermally activated delayed fluorescence
Long-lived, efficient organic light-emitting diodes based on a simple design of a single layer of an active light-emitting medium sandwiched between two contacts and no additional charge injection and transport layers are reported.
- Naresh B. Kotadiya
- , Paul W. M. Blom
- & Gert-Jan A. H. Wetzelaer
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Organics go hybrid
From displays to solar cells, the field of organic optoelectronics has come a long way over the past 50 years, but the realization of an electrically pumped organic laser remains elusive. The answer may lie with hybrid organic–inorganic materials called perovskites.
- Guglielmo Lanzani
- , Annamaria Petrozza
- & Mario Caironi
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Near-infrared organic light-emitting diodes with very high external quantum efficiency and radiance
New design of Pt(II) phosphors yield near-infrared organic light-emitting diodes with high efficiency and brightness.
- Kiet Tuong Ly
- , Ren-Wu Chen-Cheng
- & Yun Chi
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Article |
High-gain infrared-to-visible upconversion light-emitting phototransistors
An optoelectronic device that efficiently converts infrared light to visible light could prove useful for imaging applications.
- Hyeonggeun Yu
- , Doyoung Kim
- & Franky So
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Article |
Enhanced light extraction from organic light-emitting devices using a sub-anode grid
A diffractive dielectric grid placed between the anode and substrate of an organic light-emitting device is found to significantly enhance the extraction of light.
- Yue Qu
- , Michael Slootsky
- & Stephen R. Forrest
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News & Views |
Light-emitting fabrics
Light-emitting fibres that suit integration with textiles are prepared by dip-coating a steel wire with an electroluminescent material and then cleverly wrapping the structure with a carbon nanotube sheet that functions as a transparent electrode.
- Enrique Ortí
- & Henk J. Bolink
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A colour-tunable, weavable fibre-shaped polymer light-emitting electrochemical cell
A fibre-shaped light emitting electrochemical cell that can be woven and integrated with textiles offers new opportunities for smart fabrics.
- Zhitao Zhang
- , Kunping Guo
- & Huisheng Peng
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News & Views |
Phosphorescence meets its match
The advent of novel fluorophores that harness thermally activated energy transfer processes is resulting in a new breed of highly efficient organic light-emitting diodes.
- Sebastian Reineke
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Article |
Efficient blue organic light-emitting diodes employing thermally activated delayed fluorescence
Blue organic light-emitting diodes that harness thermally activated delayed fluorescence are realized with an external quantum efficiency of 19.5% and reduced roll-off at high luminance.
- Qisheng Zhang
- , Bo Li
- & Chihaya Adachi
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News & Views |
Light-emitting electronic skin
Flexible electronics and optoelectronics have potential applications in energy generation, biomedicine, robotics and displays. Two recent demonstrations of highly stretchable polymer LEDs suggest that commercial devices may soon become viable.
- Michael Vosgueritchian
- , Jeffrey B.-H. Tok
- & Zhenan Bao
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Editorial |
Fantastic plastic
Flexible and stretchable solar cells and light-emitting diodes are respectively perceived as being next-generation photovoltaic and lighting technologies, and are attracting the attention of the general public.
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Article |
Ultrathin, highly flexible and stretchable PLEDs
Ultrathin sheets of polymer LEDs that emit light even when being crumpled or stretched have been realized. The 2-μm-thick devices emit red or orange light with a sufficiently high brightness for indoor applications, and they could prove useful for integration with textiles.
- Matthew S. White
- , Martin Kaltenbrunner
- & Niyazi Serdar Sariciftci
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Versatile surface plasmon resonance of carbon-dot-supported silver nanoparticles in polymer optoelectronic devices
The coupling of surface plasmons and excitons in organic materials can improve the performance of organic optoelectronic devices. Carbon-dot-supported silver nanoparticles have now been used to improve the efficiency of polymer light-emitting diodes and polymer solar cells.
- Hyosung Choi
- , Seo-Jin Ko
- & Jin Young Kim
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Letter |
Extremely efficient flexible organic light-emitting diodes with modified graphene anode
By replacing conventional indium tin oxide (ITO) anodes with high-work-function, low-sheet-resistance graphene anodes, researchers demonstrate flexible fluorescent organic LEDs with extremely high luminous efficiencies of 37.2 lm W–1 for fluorescent devices and 102.7 lm W–1 for phosphorescent devices. These values are significantly higher than those of optimized organic LEDs based on ITO anodes.
- Tae-Hee Han
- , Youngbin Lee
- & Tae-Woo Lee
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News & Views |
Efficient and flexible solution
Researchers have developed flexible thin-film OLEDs that exhibit high efficiencies at green wavelengths without the use of a high-refractive-index substrate.
- Karl Leo
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Letter |
Unlocking the full potential of organic light-emitting diodes on flexible plastic
Using a thin-film outcoupling enhancement method consisting of a weak optical cavity on a flexible substrate with a non-indium-tin-oxide anode, researchers demonstrate phosphorescent organic LEDs with an external quantum efficiency of up to 63% at green wavelengths, which remains as high as 60% at luminous intensities of >10,000 cd m−2.
- Z. B. Wang
- , M. G. Helander
- & Z. H. Lu
Chiral materials and mechanisms for circularly polarized light-emitting diodes