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566 Newest Publications about the topic leds


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The Control of Conjugation Lengths and Steric Hindrance to Modulate Aggregation‐Induced Emission with High Electroluminescence Properties and Interesting Optical Properties

20-Nov-2015 | Miao‐Miao Xue, Yue‐Min Xie, Lin‐Song Cui, Xiang‐Yang Liu, Xiao‐Dong Yuan, Yong‐Xi Li, Zuo‐Quan Jiang, Liang‐Sheng Liao, Chemistry - A European Journal, 2015

Abstract A series of novel AIE‐active (aggregation‐induced emission) molecules, named SAF‐2‐TriPE, SAF‐3‐TriPE, and SAF‐4‐TriPE, were designed and synthesized through facile reaction procedures. We found that incorporation of the spiro‐acridine‐fluorene (SAF) group, which is famous for its ...


All-Quantum-Dot Infrared Light-Emitting Diodes

20-Nov-2015 | Zhenyu Yang; Oleksandr Voznyy; Mengxia Liu; Mingjian Yuan; Alexander H. Ip; Osman S. Ahmed; Larissa Levina; Sachin K ..., ACS Nano, 2015

Colloidal quantum dots (CQDs) are promising candidates for infrared electroluminescent devices. To date, CQD-based light-emitting diodes (LEDs) have employed a CQD emission layer sandwiched between carrier transport layers built using organic materials and inorganic oxides. Herein, we report the ...


Perovskite Crystals for Tunable White Light Emission

19-Nov-2015 | Sandeep Pathak; Nobuya Sakai; Florencia Wisnivesky Rocca Rivarola; Samuel D. Stranks; Jiewei Liu; Giles E. Eperon; C ..., Chemistry of Materials, 2015

A significant fraction of global electricity demand is for lighting. Enabled by the realization and development of efficient GaN blue light-emitting diodes (LEDs), phosphor-based solid-state white LEDs provide a much higher efficiency alternative to incandescent and fluorescent lighting, which ...


An improved alkaline direct formate paper microfluidic fuel cell

17-Nov-2015 | Vicente Galvan, Kryls Domalaon, Catherine Tang, Samantha Sotez, Alex Mendez, Mehdi Jalali‐Heravi, Krutarth Purohit, ..., ELECTROPHORESIS, 2015

Paper‐based microfluidic fuel cells (MFCs) are a potential replacement for traditional FCs and batteries due to their low cost, portability, and simplicity to operate. In MFCs, separate solutions of fuel and oxidant migrate through paper due to capillary action and laminar flow and, upon contact ...


Materials, Vol. 8, Pages 7745-7756: Origin of the Electroluminescence from Annealed-ZnO/GaN Heterojunction Light-Emitting Diodes

16-Nov-2015 | Hsu, Kai-Chiang ; Hsiao, Wei-Hua ; Lee, Ching-Ting ; Chen, Yan-Ting ; Liu, Day-Shan, Materials, 2015

This paper addressed the effect of post-annealed treatment on the electroluminescence (EL) of an n-ZnO/p-GaN heterojunction light-emitting diode (LED). The bluish light emitted from the 450 °C-annealed LED became reddish as the LED annealed at a temperature of 800 °C under vacuum atmosphere. The ...


Sensors, Vol. 15, Pages 28627-28645: Development of a High Irradiance LED Configuration for Small Field of View Motion Estimation of Fertilizer Particles

12-Nov-2015 | Cool, Simon ; Pieters, Jan G.; Mertens, Koen C.; Mora, Sergio ; Cointault, Frédéric ; Dubois, Julien ; van de Gucht, ..., Sensors, 2015

Better characterization of the fertilizer spreading process, especially the fertilizer pattern distribution on the ground, requires an accurate measurement of individual particle properties and dynamics. Both 2D and 3D high speed imaging techniques have been developed for this purpose. To ...


Simulation of an indium gallium nitride quantum well light‐emitting diode with the non‐equilibrium Green's function method

09-Nov-2015 | Akshay Shedbalkar, Zhelio Andreev, Bernd Witzigmann, physica status solidi (b), 2015

Abstract This work presents a quantum mechanical simulation of an indium gallium nitride (InGaN) based light‐emitting diode (LED) using the non‐equilibrium Green's function (NEGF) method. Due to the wurtzite crystal structure, such LEDs exhibit strong polarization‐induced electric fields ...


Enhanced Optical Properties of Bredigite‐Structure Ca13.7Eu0.3Mg2[SiO4]8 Phosphor: Effective Eu Reduction by La Co‐Doping

06-Nov-2015 | Seung Jun Kim, Ho Seong Jang, Sanjith Unithrattil, Yoon Hwa Kim, Won Bin Im, Journal of the American Ceramic Society, 2015

A green phosphor, La0.4Ca13.3Eu0.3Mg2Si8O31.6+δN0.4−δ (LaCMSN:Eu2+), was prepared by a solid‐state reaction and an efficient green emission was observed at 506 nm under near‐ultraviolet (NUV) excitation. The structural and optical properties of LaCMSN:Eu2+ phosphors as well as their thermal ...


A novel greenish yellow-orange red Ba3Y4O9:Bi3+,Eu3+ phosphor with efficient energy transfer for UV-LEDs

03-Nov-2015 | Kai Li; Hongzhou Lian; mm shang; Jun Lin, Dalton Transactions, 2015

A series of novel color-tunable Ba3Y4O9:Bi3+,Eu3+ phosphors were first prepared via the high-temperature solid-state reaction route. The effect of Bi3+ concentration on the emission intensity of Ba3Y4O9:Bi3+ is investigated. The emission spectra of the Ba3Y4O9:Bi3+,Eu3+ phosphors present both a ...


In situ electronic probing of semiconducting nanowires in an electron microscope

26-Oct-2015 | V. T. FAUSKE, M. B. ERLBECK, J. HUH, D. C. KIM, A. M. MUNSHI, D. L. DHEERAJ, H. WEMAN, B. O. FIMLAND, A. T. J. VAN H ..., Journal of Microscopy, 2015

Summary For the development of electronic nanoscale structures, feedback on its electronic properties is crucial, but challenging. Here, we present a comparison of various in situ methods for electronically probing single, p‐doped GaAs nanowires inside a scanning electron microscope. The ...


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