Spirobifluorene derivative: a pure blue emitter (CIEy ≈ 0.08) with high efficiency and thermal stability

2012 ◽  
Vol 22 (30) ◽  
pp. 15136 ◽  
Author(s):  
Xing Xing ◽  
Lixin Xiao ◽  
Lingling Zheng ◽  
Shuangyuan Hu ◽  
Zhijian Chen ◽  
...  
Keyword(s):  
Thermal Stability ◽  
High Efficiency

scholarly journals A cyan-emitting phosphor Ca3SiO4(Cl,Br)2:Eu2+ with high efficiency and good thermal stability for full-visible-spectrum LED lighting

2021 ◽  
Vol 232 ◽  
pp. 117854
Author(s):  
Yuan Zhu ◽  
Lei Fu ◽  
Di Wu ◽  
Jiaqing Peng ◽  
Fu Du ◽  
...  
Keyword(s):  
Thermal Stability ◽  
High Efficiency ◽  
Visible Spectrum ◽  
Led Lighting ◽  
Good Thermal Stability

Isolation of Cellulose Nanofibers (CNFs) based on Ball-milling Technique Combined with Supercritical Carbon dioxide/ethanol Pretreatment

2021 ◽  
Author(s):  
Zhijun Hu ◽  
Xinyu Cao ◽  
Guanhong Huang ◽  
Daliang Guo
Keyword(s):  
Thermal Stability ◽  
Reaction Time ◽  
Ball Milling ◽  
High Efficiency ◽  
Cellulose Nanofibers ◽  
Sem Images ◽  
Tempo Oxidation ◽  
Good Thermal Stability ◽  
Ethanol Pretreatment ◽  
Ball Milling Technique

Abstract Here, a new pretreatment method has been developed to produce CNFs from micro-fibrillated cellulose (MFC) by supercritical CO 2 pretreatment followed with ball-milling (SCB). MFC was obtained from cotton stalk by chemical purification.Experimental factors were controlled to enhance the properties of SCB-CNF, meanwhile a comparative study was conducted with the method of TEMPO oxidation and microfluid homogenization (TMH). Compared to TMH-CNF, the SCB-CNF has such advantages as Energy saving, high efficiency and environmental protection, indicating a wide application in heat-resistant materials, load materials and other fields. The solid yields of P-MFC after supercritical CO 2 pretreatment gradually decreased together with the temperature and the reaction time. Scanning electron microscope (SEM) images of the SCB-CNF and TMH-CNF show that the morphology of the SCB-CNF was basically acicular but that of the TMH-CNF was mainly soft fibrous. The SCB-CNF is smaller in width and shorter in length, and its size is between CNC and CNF. Thermal gravimetric results suggest that the thermal stability of the SCB-CNF was substantially higher than those of the TMH-CNF. XRD results indicate that the crystallinity showed an initial increasing trend and then declined with increasing temperature and reaction time, and the crystallinity value of SCB-CNF was larger than that of CNFs. The smaller SCB-CNF became rougher and had a larger surface area. High crystallinity make good thermal stability, short and coarse fiber, easier to disperse than CNF, less energy consumption for dispersion, better than 3D mesh. It can be widely used in polymer composites, reinforcing agents, membrane materials and other fields.

High-efficiency perovskite solar cells based on self-assembly n-doped fullerene derivative with excellent thermal stability

2019 ◽  
Vol 413 ◽  
pp. 459-466 ◽  
Author(s):  
Xiaotao Liu ◽  
Pengwei Li ◽  
Yiqiang Zhang ◽  
Xiaotian Hu ◽  
Yanyan Duan ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Solar Cells ◽  
Self Assembly ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Fullerene Derivative ◽  
Excellent Thermal Stability

scholarly journals High-performance La-doped BCZT thin film capacitors on LaNiO3/Pt composite bottom electrodes with ultra-high efficiency and high thermal stability

2019 ◽  
Vol 45 (9) ◽  
pp. 11749-11755 ◽  
Author(s):  
Shangkai He ◽  
Biaolin Peng ◽  
Glenn J.T. Leighton ◽  
Christopher Shaw ◽  
Ningzhang Wang ◽  
...  
Keyword(s):  
Thin Film ◽  
Thermal Stability ◽  
High Performance ◽  
High Efficiency ◽  
High Thermal Stability ◽  
Thin Film Capacitors ◽  
La Doped

scholarly journals Li substituent tuning of LED phosphors with enhanced efficiency, tunable photoluminescence, and improved thermal stability

2019 ◽  
Vol 5 (1) ◽  
pp. eaav0363 ◽  
Author(s):  
Ming Zhao ◽  
Zhiguo Xia ◽  
Xiaoxiao Huang ◽  
Lixin Ning ◽  
Romain Gautier ◽  
...  
Keyword(s):  
Thermal Stability ◽  
High Efficiency ◽  
Light Emitting ◽  
Green Component ◽  
Emission Color ◽  
Lighting Industry ◽  
Improved Performance ◽  
White Light Emitting Diodes ◽  
Li Substitution ◽  
Lithium Incorporation

Solid-state phosphor-converted white light-emitting diodes (pc-WLEDs) are currently revolutionizing the lighting industry. To advance the technology, phosphors with high efficiency, tunable photoluminescence, and high thermal stability are required. Here, we demonstrate that a simple lithium incorporation in NaAlSiO4:Eu system enables the simultaneous fulfillment of the three criteria. The Li substitution at Al sites beside Na sites in NaAlSiO4:Eu leads to an enhanced emission intensity/efficiency owing to an effective Eu3+to Eu2+reduction, an emission color tuning from yellow to green by tuning the occupation of different Eu sites, and an improvement of luminescence thermal stability as a result of the interplay with Li-related defects. A pc-WLED using the Li-codoped NaAlSiO4:Eu as a green component exhibits improved performance. The phosphors with multiple activator sites can facilitate the positive synergistic effect on luminescence properties.

Excellent thermal stability, high efficiency and high power density of (Sr0.7Ba0.3)5LaNb7Ti3O30–based tungsten bronze ceramics

2020 ◽  
Vol 40 (6) ◽  
pp. 2366-2374 ◽  
Author(s):  
Lei Cao ◽  
Ying Yuan ◽  
Bin Tang ◽  
Enzhu Li ◽  
Shuren Zhang
Keyword(s):  
Thermal Stability ◽  
Power Density ◽  
High Power ◽  
High Efficiency ◽  
Tungsten Bronze ◽  
High Power Density ◽  
Excellent Thermal Stability

scholarly journals Stable P3HT: amorphous non-fullerene solar cells with a high open-circuit voltage of 1 V and efficiency of 4%

RSC Advances ◽  
2019 ◽  
Vol 9 (36) ◽  
pp. 20733-20741 ◽  
Author(s):  
HyunKyung Lee ◽  
Sora Oh ◽  
Chang Eun Song ◽  
Hang Ken Lee ◽  
Sang Kyu Lee ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Solar Cells ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Open Circuit Voltage ◽  
Energy Levels ◽  
Open Circuit ◽  
Good Thermal Stability

A 3D-shaped SF-HR was designed and synthesized for use in non-fullerene organic solar cells. Owing to the aligned energy levels, the P3HT:SF-HR system exhibited a high efficiency of 4.01% with good thermal stability and photostability.

High-efficiency fully concentrated Na3Eu(VO4)2 phosphor with excellent thermal stability for white light-emitting diodes

2020 ◽  
Vol 31 (15) ◽  
pp. 12872-12879
Author(s):  
Jiangcong Zhou ◽  
Yanling Zhang ◽  
Yao Yao ◽  
Bo Wang ◽  
Yiqing Lai ◽  
...  
Keyword(s):  
Thermal Stability ◽  
White Light ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Excellent Thermal Stability ◽  
Light Emitting ◽  
White Light Emitting Diodes

High quality, high efficiency and ultrahigh In-content InGaN QWs – the problem of thermal stability

2008 ◽  
Vol 5 (6) ◽  
pp. 1662-1664 ◽  
Author(s):  
D. Fuhrmann ◽  
H. Jönen ◽  
L. Hoffmann ◽  
H. Bremers ◽  
U. Rossow ◽  
...  
Keyword(s):  
Thermal Stability ◽  
High Efficiency ◽  
High Quality

Long-Term Thermal Stability of High-Efficiency Polymer Solar Cells Based on Photocrosslinkable Donor-Acceptor Conjugated Polymers

2011 ◽  
Vol 23 (14) ◽  
pp. 1660-1664 ◽  
Author(s):  
Gianmarco Griffini ◽  
Jessica D. Douglas ◽  
Claudia Piliego ◽  
Thomas W. Holcombe ◽  
Stefano Turri ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Solar Cells ◽  
Conjugated Polymers ◽  
High Efficiency ◽  
Polymer Solar Cells ◽  
Donor Acceptor ◽  
Thermal Stability Of
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