Results 111 to 120 of about 156,793 (303)

Energy‐Efficient Bulk Photoalignment of Main‐Chain Liquid Crystalline Polymers Enabled by In Situ Monitoring

Advanced Functional Materials, EarlyView.
In situ monitoring of bulk photoalignment reveals how molecular weight, azobenzene content, cooling rate, and thickness govern ordering in main‐chain liquid crystalline polymers. Optimized copolymers exceed conventional thickness limits, maintaining stable alignment up to 130 µm with high energy efficiency and reversible optical patterning.
Jaechul Ju, Joy Zhou, Connor J. O'Dea, Zachariah A. Page   +3 more
wiley   +1 more source

A Software-Defined Multi-Element VLC Architecture

, 2017
In the modern era of radio frequency (RF) spectrum crunch, visible light communication (VLC) is a recent and promising alternative technology that operates at the visible light spectrum.
Eroglu, Yusuf Said, Guvenc, Ismail, Mushfique, Sifat Ibne, Pala, Nezih, Palathingal, Prabath, Yuksel, Murat   +5 more
core   +1 more source

Powering the Future: A Cobalt‐Based Catalyst for Longer‐Lasting Zinc–Air Batteries

Advanced Functional Materials, EarlyView.
A novel N‐doped graphitic shell‐encapsulated Co catalyst reveals superior bifunctional ORR/OER activity in alkaline media, empowering outstanding liquid and quasi‐solid‐state ZAB activity. The system delivers long‐term durability, a peak power density of 127 mW cm−2 and successfully powers an LED and a mini fan.
Manami Banerjee, Peng Ren, Greesh Kumar, Lucie Lindenbeck, Byoung Joon Park, Anna Rokicińska, Piotr Kuśtrowski, Adam Slabon, Francesco Ciucci, Ramendra Sundar Dey, Shoubhik Das   +10 more
wiley   +1 more source

Synthesis and Luminescent Characteristics of (Ca4-x-yzBaySrz)(PO4)2O:xEu2+ Phosphors as a Potential Application for White-Light Emitting Diode

Ethiopian Journal of Science and Sustainable Development, 2019
A novel tunable red- to yellow- emitting phosphor,(Ca4-x-y-zBaySrz)(PO4)2O:xEu2+is reported that displays a broad emission from 500 to 800nm, and its emission can be adjusted from red to yellow by changing Ba2+ and Sr2+ doping concentration. X-ray powder
G. G. Deressa
doaj   +1 more source

Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics

Advanced Functional Materials, EarlyView.
Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha, Yingshan Ma, Yong Nam An, Sung‐Un An, Hyeon Hak Jung, Suvi‐Tuuli Varjamo, Jiwon Yoo, Junho Min, Hanvit Kim, Faisal Ahmed, Sang Hoon Chae, Young Min Song, Weiwei Cai, Tawfique Hasan, Zhipei Sun, Dong‐Ho Kang, Hyeon‐Jin Shin, Yunyun Dai, Hoon Hahn Yoon   +18 more
wiley   +1 more source

Parametric Compact Thermal Models of Power LEDs

Energies, 2019
Light-emitting diodes are nowadays the most dynamically developing type of light sources. Considering that temperature is the main factor affecting the electrical and lighting parameters of these devices, thermal models are essential subcomponents of the
Marcin Janicki, Tomasz Torzewicz, Przemysław Ptak, Tomasz Raszkowski, Agnieszka Samson, Krzysztof Górecki   +5 more
doaj   +1 more source

Purcell‐Enhanced Spectrally Precise Emission in Dual‐Microcavity Organic Light‐Emitting Diodes

Advanced Functional Materials, EarlyView.
Spectrally precise emission from broadband organic light‐emitting diodes is realized via a dual‐microcavity strategy. This architecture achieves narrowband emission (full width at half maximum, FWHM = 21 nm) with ultrapure color approaching BT.2020 by enhancing the Purcell effect via coupling of excitons with dual‐microcavity resonance.
Jun Yong Kim, Sang Youn Lee, Kwan Hyun Cho, Yun Seon Do   +3 more
wiley   +1 more source

Complex Evaluation of Light Sources in Case of Electric Power Cost Increase

Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2008
The paper gives complex evaluation of efficiency of incandescent lamps, luminescent and light-emitting-diode (LED) light sources in case of electric power price increase.
Y. N. Kolesnik, A. V. Ivaneychik
doaj  

Structured illumination microscopy using micro-pixellated light-emitting diodes [PDF]

, 2006
Structured illumination is a flexible and economical method of obtaining optical sectioning in wide-field microscopy [1]. In this technique the illumination system is modified to project a single-spatial frequency grid pattern onto the sample [2, 3]. The
Dawson, M.D., Elson, D.S., French, P.M.W., Girkin, J.M., Gong, Z., Griffin, C., Gu, E., Kennedy, G.T., Neil, M.A.A., Poher, V., Zhang, H.Z.   +10 more
core  

Smarter Sensors Through Machine Learning: Historical Insights and Emerging Trends across Sensor Technologies

Advanced Functional Materials, EarlyView.
This review highlights how machine learning (ML) algorithms are employed to enhance sensor performance, focusing on gas and physical sensors such as haptic and strain devices. By addressing current bottlenecks and enabling simultaneous improvement of multiple metrics, these approaches pave the way toward next‐generation, real‐world sensor applications.
Kichul Lee, Osman Gul, Yeongjae Kwon, Jaeseok Jeong, Seokjoo Cho, Jihyeon Ahn, Jehee Yu, Cheolmin Kim, Donho Lee, Hyeonseok Han, Byeongju Lee, Jungrak Choi, Ji‐Hwan Ha, Yongrok Jeong, Kyungnam Kang, Ali Javey, Junseong Ahn, Inkyu Park   +17 more
wiley   +1 more source