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628 Newest Publications about the topic leds

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All‐Inorganic Perovskite Nanocrystals for High‐Efficiency Light Emitting Diodes: Dual‐Phase CsPbBr3‐CsPb2Br5 Composites

26-Apr-2016 | Xiaoli Zhang, Bing Xu, Jinbao Zhang, Yuan Gao, Yuanjin Zheng, Kai Wang, Xiao Wei Sun, Advanced Functional Materials, 2016

A dual‐phase all‐inorganic composite CsPbBr3‐CsPb2Br5 is developed and applied as the emitting layer in LEDs, which exhibited a maximum luminance of 3853 cd m–2, with current density (CE) of ≈8.98 cd A–1 and external quantum efficiency (EQE) of ≈2.21%, respectively. The parasite of secondary ...

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Efficient yellow and green emitting InGaN/GaN nanostructured QW materials and LEDs

25-Apr-2016 | Yoshitake Nakajima, Yenting Lin, Paul Daniel Dapkus, physica status solidi (a), 2016

Efficient green emitting LEDs and monolithic white light emitting LEDs require the extension of the range of efficient light emission in the GaN/InGaN materials system. We demonstrate high efficiency green and yellow light emitting multiple quantum well (MQW) structures grown on GaN nanostripe ...

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Polymer-Free Films of Inorganic Halide Perovskite Nanocrystals as UV-to-White Color-Conversion Layers in LEDs

25-Apr-2016 | Francisco Palazon; Francesco Di Stasio; Quinten A. Akkerman; Roman Krahne; Mirko Prato; Liberato Manna, Chemistry of Materials, 2016

Chemistry of Materials DOI: 10.1021/acs.chemmater.6b00954

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Multilayer Transfer Printing for Pixelated, Multicolor Quantum Dot Light-Emitting Diodes

21-Apr-2016 | Bong Hoon Kim; Sooji Nam; Nuri Oh; Seong-Yong Cho; Ki Jun Yu; Chi Hwan Lee; Jieqian Zhang; Kishori Deshpande; Peter ..., ACS Nano, 2016

Here, we report multilayer stacking of films of quantum dots (QDs) for the purpose of tailoring the energy band alignment between charge transport layers and light emitting layers of different color in quantum dot light-emitting diodes (QD LED) for maximum efficiency in full color operation. The ...

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Aromatic C–H Activation in the Triplet Excited State of Cyclometalated Platinum(II) Complexes Using Visible Light

18-Apr-2016 | Fabio Juliá; Pablo González-Herrero, Journal of the American Chemical Society, 2016

The visible-light driven cyclometalation of arene substrates containing an N-donor heteroaromatic moiety as directing group by monocyclometalated Pt(II) complexes is reported. Precursors of the type [PtMe(C^N)(N^CH)], where N^CH is 2-phenylpyridine (ppyH) or related compunds with diverse ...

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Impact of surface recombination on efficiency of III‐nitride light‐emitting diodes

13-Apr-2016 | Kirill A. Bulashevich, Sergey Yu. Karpov, physica status solidi (RRL) - Rapid Research Letters, 2016

The paper considers surface recombination at the free active region surface as the mechanism of carrier losses which has not yet been discussed with regard to III‐nitride LEDs despite of its evident importance for AlGaInP‐based light emitters. Using advanced thin‐film and triangular volumetric ...

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Crystal structure and luminescence properties of a novel Ce3+ and Ce3+, Sm3+-activated Y4SiAlO8N phosphors for near-UV white LEDs

13-Apr-2016 | Youjie Hua; Xiaojun Li; Dawei Zhang; Hongping Ma; Degang Deng; Shiqing Xu, New Journal of Chemistry, 2016

Abstract: A series of novel Ce3+ and/or Sm3+ activated Y4SiAlO8N (YSAON) phosphors are successfully synthesized by a conventional solid-state reaction method. The monophasic formation of YSAON is confirmed by X-ray powder diffraction (XRD) analysis. The crystal structure of YSAON is solved by XRD ...

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Microstructured Air Cavities as High-Index Contrast Substrates with Strong Diffraction for Light-Emitting Diodes

07-Apr-2016 | Yoon-Jong Moon; Daeyoung Moon; Jeonghwan Jang; Jin-Young Na; Jung-Hwan Song; Min-Kyo Seo; Sunghee Kim; Dukkyu Bae; E ..., Nano Letters, 2016

Two-dimensional high-index-contrast dielectric gratings exhibit unconventional transmission and reflection due to their morphologies. For light-emitting devices, these characteristics help guided modes defeat total internal reflections, thereby enhancing the outcoupling efficiency into an ambient ...

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Band-Gap Modulation in Single Bi3+-Doped Yttrium–Scandium–Niobium Vanadates for Color Tuning over the Whole Visible Spectrum

07-Apr-2016 | Fengwen Kang; Haishan Zhang; Lothar Wondraczek; Xiaobao Yang; Yi Zhang; Dang Yuan Lei; Mingying Peng, Chemistry of Materials, 2016

The use of rare-earth (RE) (e.g., Eu2+/Ce3+) ions as single luminescent centers in phosphors with tailorable emission properties has been extensively studied for their potential use in white LEDs. However, significant limitations remain, in particular, for red-emitting phosphors due to the ...

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Transparent InP Quantum Dot Light‐Emitting Diodes with ZrO2 Electron Transport Layer and Indium Zinc Oxide Top Electrode

06-Apr-2016 | Hee Yeon Kim, Yu Jin Park, Jiwan Kim, Chul Jong Han, Jeongno Lee, Yohan Kim, Tonino Greco, Christian Ippen, Armin We ..., Advanced Functional Materials, 2016

Because of outstanding optical properties and non‐vacuum solution processability of colloidal quantum dot (QD) semiconductors, many researchers have developed various light emitting diodes (LEDs) using QD materials. Until now, the Cd‐based QD‐LEDs have shown excellent properties, but the ...

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