High refractive index thermally stable phenoxyphenyl and phenylthiophenyl silicones for light-emitting diode applications

2013 ◽  
Vol 131 (3) ◽  
pp. n/a-n/a ◽  
Author(s):  
David W. Mosley ◽  
Garo Khanarian ◽  
David M. Conner ◽  
David L. Thorsen ◽  
Tianlan Zhang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Light Emitting Diode ◽  
High Refractive Index ◽  
Thermally Stable ◽  
Light Emitting

scholarly journals Fabrication of Reactive Poly(Phenyl-Substituted Siloxanes/Silsesquioxanes) with Si‒H and Alkoxy Functional Groups via the Piers–Rubinsztajn Reaction

Polymers ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1006 ◽  
Author(s):  
Minghao Yi ◽  
Xunjun Chen ◽  
Shufang Wu ◽  
Jianfang Ge ◽  
Xinhua Zhou ◽  
...  
Keyword(s):  
Refractive Index ◽  
Functional Groups ◽  
Potential Application ◽  
Light Emitting Diode ◽  
Crosslinking Agent ◽  
Weight Ratio ◽  
Gel Permeation Chromatography ◽  
High Refractive Index ◽  
Light Emitting ◽  
Molecular Weights

Poly(phenyl-substituted siloxanes/silsesquioxanes) are obtained by the Piers–Rubinsztajn (PR) reaction of hydrogen-containing siloxanes (HCS) with diphenyldialkoxysilanes such as diphenyldimethoxysilane and diphenyldiethoxysilane catalyzed by tris(pentafluorophenyl)borane. 29Si nuclear magnetic resonance (NMR) spectroscopy, gel permeation chromatography, and refractive index analysis revealed that apart from phenyl substituents and complex structures such as molecular bridges composed of D2Ph2[(C6H5)2Si(OSi)2], structures also existed in these polymers, having high refractive indexes (above 1.50) and high molecular weights (75.60 KDa·mol−1). As revealed by thermogravimetric analysis, these polymers have high thermal stability as well, with temperature at 5% mass loss (T5%) increasing by 182.5 °C and Rw (residual weight ratio) increasing by 5.17 times from 14.63% to 75.60%, as compared to HCS, exhibiting its potential application as resins for resisting strong heat. Such high-refractive-index and temperature-resistant poly(phenyl-substituted siloxanes/silsesquioxanes) with Si–H and alkoxy functional groups can be used as a good addition-type crosslinking agent with adhesion-promoting properties or a special curing agent that can solidify silicone materials through simultaneous addition and condensation reactions, which has potential application in the light-emitting diode (LED) packaging industry.

scholarly journals High-refractive-index TiO2-nanoparticle-loaded encapsulants for light-emitting diodes

2008 ◽  
Vol 103 (8) ◽  
pp. 083120 ◽  
Author(s):  
Frank W. Mont ◽  
Jong Kyu Kim ◽  
Martin F. Schubert ◽  
E. Fred Schubert ◽  
Richard W. Siegel
Keyword(s):  
Refractive Index ◽  
Light Emitting Diodes ◽  
High Refractive Index ◽  
Tio2 Nanoparticle ◽  
Light Emitting
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