Polyphenylsilsesquioxane Partially-substituted with Germanium: Refractive Index Controllability and Thermal Stability

2002 ◽  
Vol 31 (2) ◽  
pp. 244-245 ◽  
Author(s):  
Naoki Yasuda ◽  
Shigeyuki Yamamoto ◽  
Yasuchika Hasegawa ◽  
Hideharu Nobutoki ◽  
Yuji Wada ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Refractive Index

Optical properties, thermal stability, and forming region of high refractive index La2 O3 -TiO2 -Nb2 O5 glasses

2017 ◽  
Vol 101 (4) ◽  
pp. 1500-1507 ◽  
Author(s):  
Zhaozhao Mao ◽  
Chaoyue Wang ◽  
Xiaojie Zheng ◽  
Jianding Yu ◽  
Liangming Xiong
Keyword(s):  
Thermal Stability ◽  
Refractive Index ◽  
Optical Properties ◽  
High Refractive Index

Fluorinated, Low Thermal Expansion Coefficient Polyimides For Interlayer Dielectric Application: Thermal Stability, Refractive Index And High Temperature Modulus Measurements

1995 ◽  
Vol 381 ◽  
Author(s):  
Brian C. Auman
Keyword(s):  
Thermal Stability ◽  
Refractive Index ◽  
Glass Transition ◽  
Moisture Absorption ◽  
Mechanical Analysis ◽  
Interlayer Dielectric ◽  
Low Thermal Expansion ◽  
Fluorinated Polyimides ◽  
Out Of Plane ◽  
Mechanical Modulus

AbstractThe mechanical, thermal, electrical and moisture absorption properties of rod-like, fluorinated polyimides and copolyimides developed in our laboratory are briefly reviewed. Further characterization work on the most promising candidates for interlayer dielectric applications is reported. This includes in- and out-of-plane refractive index measurements to estimate the isotropy of the dielectric constant, isothermal TGA measurements to assess thermal stability at processing temperatures and dynamic-mechanical analysis to ascertain the glass transition temperature and the mechanical modulus at temperatures in excess of the glass transition

Highly flexible and optical transparent 6F-PI/TiO2optical hybrid films with tunable refractive index and excellent thermal stability

2010 ◽  
Vol 20 (3) ◽  
pp. 531-536 ◽  
Author(s):  
Guey-Sheng Liou ◽  
Po-Han Lin ◽  
Hung-Ju Yen ◽  
Yang-Yen Yu ◽  
Tsung-Wei Tsai ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Refractive Index ◽  
Hybrid Films ◽  
Excellent Thermal Stability ◽  
Tunable Refractive Index

Transparent cyclo-linear polyphenylsiloxane elastomer integrating high refractive index, thermal stability and flexibility.

2021 ◽  
Author(s):  
xianpeng Fan ◽  
Xinyu Cao ◽  
Xinxin Shang ◽  
Xianglan Zhang ◽  
Cheng Huang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Refractive Index ◽  
High Refractive Index ◽  
One Pot ◽  
Hydrosilylation Reaction ◽  
New Type

A new type of cyclo-linear structured high phenyl content siloxane elastomer (Ph-CLS-E) is prepared through “one-pot” hydrosilylation reaction that take advantage of the reactivity differences of the cyclic, linear precursors...

A Correlation Study of Thermal Stability on Porous Low k

2002 ◽  
Vol 716 ◽  
Author(s):  
Y.F. Chow ◽  
T.H. Foo ◽  
L. Shen ◽  
J.S. Pan ◽  
A.Y. Du ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Dielectric Constant ◽  
Refractive Index ◽  
Annealing Temperature ◽  
Correlation Study ◽  
Film Properties ◽  
Unannealed Sample ◽  
Nano Indentation ◽  
Low K ◽  
Thermal Stability Of

AbstractThe thermal stability of organic porous low k, porous SiLK with a dielectric constant of 2.4, has been studied. Organic low k material SiLKTM, non-porous SiLK, with a dielectric constant 2.8 is used as a baseline for comparison. Each sample was subjected to annealing cycles, where each cycle was conducted in a vertical furnace for one hour in an N2 ambient. The annealing temperature was set at either 430°C or 450°C. After every alternate cycle, the film properties were measured and compared to the unannealed sample for changes in film shrinkage, refractive index, dielectric constant, roughness, breakdown voltage, pore size, hardness and Young's modulus. Changes in film properties were investigated and evaluated by using opti-probe, FTIR, XPS, AFM, mercury probe, nano-indentation, SEM and TEM techniques.

Multi-functional branched polysiloxanes polymers for high refractive index and flame retardant LED encapsulants

RSC Advances ◽  
2016 ◽  
Vol 6 (6) ◽  
pp. 4377-4381 ◽  
Author(s):  
Chih-Yuan Hsu ◽  
Wei-Gang Han ◽  
Shu-Jen Chiang ◽  
Wen-Chiung Su ◽  
Ying-Ling Liu
Keyword(s):  
Thermal Stability ◽  
Refractive Index ◽  
Thermal Resistance ◽  
Flame Retardant ◽  
Blue Light ◽  
High Refractive Index ◽  
High Transparency ◽  
Good Thermal Stability ◽  
Light Region ◽  
High Thermal Resistance

Multi-functional branched polysiloxanes exhibiting good thermal stability, high thermal resistance, self-extinguishing properties, high transparency at ultraviolet to blue light region, and relatively high RI value (1.59).

Advanced Passivation Technology and Loss Factor Minimization for High Efficiency Solar Cells

2015 ◽  
Vol 15 (10) ◽  
pp. 7699-7705 ◽  
Author(s):  
Cheolmin Park ◽  
Nagarajan Balaji ◽  
Sungwook Jung ◽  
Jaewoo Choi ◽  
Minkyu Ju ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Refractive Index ◽  
Solar Cells ◽  
High Efficiency ◽  
Surface Passivation ◽  
Surface Recombination ◽  
Optimization Techniques ◽  
Crystal Defects ◽  
Passivation Layer ◽  
Surface Recombination Velocity

High-efficiency Si solar cells have attracted great attention from researchers, scientists, photovoltaic (PV) industry engineers for the past few decades. With thin wafers, surface passivation becomes necessary to increase the solar cells efficiency by overcoming several induced effects due to associated crystal defects and impurities of c-Si. This paper discusses suitable passivation schemes and optimization techniques to achieve high efficiency at low cost. SiNx film was optimized with higher transmittance and reduced recombination for using as an effective antireflection and passivation layer to attain higher solar cell efficiencies. The higher band gap increased the transmittance with reduced defect states that persisted at 1.68 and 1.80 eV in SiNx films. The thermal stability of SiN (Si-rich)/SiN (N-rich) stacks was also studied. Si-rich SiN with a refractive index of 2.7 was used as a passivation layer and N-rich SiN with a refractive index of 2.1 was used for thermal stability. An implied VOC of 720 mV with a stable lifetime of 1.5 ms was obtained for the stack layer after firing. Si–N and Si–H bonding concentration was analyzed by FTIR for the correlation of thermally stable passivation mechanism. The passivation property of spin coated Al2O3 films was also investigated. An effective surface recombination velocity of 55 cm/s with a high density of negative fixed charges (Qf) on the order of 9×1011 cm−2 was detected in Al2O3 films.

A highly adhesive siloxane LED encapsulant optimized for high thermal stability and optical efficiency

2016 ◽  
Vol 4 (46) ◽  
pp. 10791-10796 ◽  
Author(s):  
Yong Ho Kim ◽  
Young-Woo Lim ◽  
Daewon Lee ◽  
Yun Hyeok Kim ◽  
Byeong-Soo Bae
Keyword(s):  
Thermal Stability ◽  
Refractive Index ◽  
Radical Polymerization ◽  
Hybrid Material ◽  
Cost Effective ◽  
High Thermal Stability ◽  
Optical Efficiency ◽  
Siloxane Hybrid Material

Herein, a highly adhesive LED encapsulant (HAEncap) is proposed based on a phenyl siloxane hybrid material with a high thermal stability, refractive index, and transparency which uses cost-effective radical polymerization.

Low-loss Polymer Optical Waveguides with High Thermal Stability

2001 ◽  
Vol 708 ◽  
Author(s):  
Jae-Wook Kang ◽  
Jae-Pil Kim ◽  
Won-Young Lee ◽  
Joon-Sung Kim ◽  
Jae-Suk Lee ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Refractive Index ◽  
Optical Waveguides ◽  
High Thermal Stability ◽  
Propagation Loss ◽  
Copolymer Composition ◽  
Infrared Communication ◽  
Arylene Ether ◽  
Fluorinated Polyimides ◽  
Channel Waveguides

ABSTRACTWe synthesized novel cross-linkable fluorinated copoly(arylene ether sulfide)s for optical waveguide applications, which have high thermal stability, high optical transparency in the infrared communication region, and much smaller birefringence than other thermally stable fluorinated polyimides. The refractive index of the material can be easily controlled from 1.515 to 1.587 by changing the copolymer composition in the materials. The birefringence of the cured polymers were 0.0031∼0.0039 at the wavelength of 1.55 μm. This is much lower than those of fluorinated polyimides for optical waveguides. The refractive index of fluorinated poly(arylene ether sulfide) (FPAESI) after being stored at 100 °C for 1000 hr remains almost constant demonstrating the thermal stability. The propagation loss of the channel waveguides fabricated using reactive ion etching was less than 0.4 dB/cm at the wavelength of 1.55 μm.

Thermal Stability, Optical Transmittance, and Refractive Index Dispersion of La2 O3 -Nb2 O5 -Al2 O3 Glasses

2014 ◽  
Vol 98 (2) ◽  
pp. 402-407 ◽  
Author(s):  
Kohei Yoshimoto ◽  
Atsunobu Masuno ◽  
Hiroyuki Inoue ◽  
Yasuhiro Watanabe
Keyword(s):  
Thermal Stability ◽  
Refractive Index ◽  
Optical Transmittance ◽  
Refractive Index Dispersion
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