Highly Active and Thermally Stable Ctlromophores and Polymers for Electro-Optic Applications

1995 ◽  
Vol 392 ◽  
Author(s):  
Alex K-Y. Jen ◽  
Tian-An Chen ◽  
Varanasi Pushkara Rao ◽  
Yong-Ming Cai ◽  
Yue-Jin Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Nonlinear Optical ◽  
Thermally Stable ◽  
Highly Active ◽  
Electro Optic ◽  
Nlo Chromophores

AbstractWe have developed two new classes of highly active and thermally stable nonlinear optical (NLO) chromophores based on the use of efficient thiophene conjugating units, a N,N-diphenylamino electron-donating group, and a 1,1′-dicyanovinyl substituted electron-accepting group. We have also developed a facile and generally applicable method to functionalize NLO chromophores onto high temperature polymers to demonstrate both high electro-optic (E-O) coefficients and long-term alignment stability at 100 °C.

Thermally Stable Poled Polymers: Highly Efficient Heteroaromatic Chromophores In High Temperature Polyimides

1993 ◽  
Vol 328 ◽  
Author(s):  
Alex K-Y. Jen ◽  
K. Y. Wong ◽  
V. Pushkara Rao ◽  
K. Drost ◽  
Y. M. Cai ◽  
...  
Keyword(s):  
High Temperature ◽  
Elevated Temperature ◽  
Functional Groups ◽  
Optical Activity ◽  
Nonlinear Optical ◽  
Temporal Stability ◽  
Thermally Stable ◽  
Electro Optic ◽  
Recent Developments

ABSTRACTIn this paper, we report our recent developments in achieving thermally stable polyimides that possess large second order nonlinear optical activity. We have developed several classes of novel chromophores based on the combination of efficient thiophene conjugating units and novel electron-donating and electron-accepting functional groups. Through these developments, we have synthesized chromophores that possess non-resonant βμ values as high as 9,100 × 10−48 esu measured at 1.9 μm. These chromophores also possess improved thermal and chemical stabilities. The incorporation of these chromophores in high temperature polyimides produces E-O Materials with high linear electro-optic coefficients (in excess of 15 pm/V at 1.3 μm) and long-term temporal stability at an elevated temperature of 150°C for more than 800 hours.

Poled Polyimides for Thermally Stable Electro-Optic Materials

1992 ◽  
Vol 247 ◽  
Author(s):  
J. W. Wu ◽  
J. F. Valley ◽  
M. Stiller ◽  
S. Ermer ◽  
E. S. Binkley ◽  
...  
Keyword(s):  
Electric Field ◽  
Nonlinear Optical ◽  
Room Temperature ◽  
Curing Process ◽  
Thermally Stable ◽  
Excellent Thermal Stability ◽  
Electro Optic ◽  
Poling Temperature ◽  
Electric Field Poling ◽  
Thermal Stability Of

ABSTRACTUsing polyimide as host in a guest-host electro-optic (EO) thin film a thermally stable poled electro-optic response is demonstrated at temperatures at 150 °C and 300 °C. Electric field poling during curing process including imidization (170 -230 °C) and densification (340 -380 °C) accounts for the highly thermally stable EO response. As a room temperature curing process, chemical imidization is employed as a novel curing process. Dehydration occurring through imidization of the polyamic acid is completed chemically after poling rather than thermally during poling. After thermal aging at 155 °C (above the poling temperature) chemically imidized samples retain over 30% of their original poling induced EO signal while similarly poled samples, which have not been chemically imidized, produce a null EO response. For a class of polyimides possessing aliphatic structure, the thermoplastic behavior of cured guest-host polyimide system allowed the electric field poling at temperatures above the glass transition temperature (Tg). One example of polyimide doped with 10% nonlinear optical molecules exhibits Tg near 200 °C, leading to an excellent thermal stability of the poled EO response with a depoling knee-temperature of 150°C.

Enhanced High-Temperature Long-Term Stability of Polymer Solar Cells with a Thermally Stable TiOx Interlayer

2009 ◽  
Vol 113 (39) ◽  
pp. 17268-17273 ◽  
Author(s):  
Dong Hwan Wang ◽  
Sang Hyuk Im ◽  
Hang Ken Lee ◽  
O Ok Park ◽  
Jong Hyeok Park
Keyword(s):  
Solar Cells ◽  
High Temperature ◽  
Polymer Solar Cells ◽  
Thermally Stable ◽  
Term Stability ◽  
Long Term Stability

Highly active and thermally stable single-atom catalysts for high-temperature electrochemical devices

2020 ◽  
Vol 13 (12) ◽  
pp. 4903-4920 ◽  
Author(s):  
Jisu Shin ◽  
Young Joo Lee ◽  
Asif Jan ◽  
Sung Min Choi ◽  
Mi Young Park ◽  
...  
Keyword(s):  
High Temperature ◽  
Solid Oxide ◽  
Single Atom ◽  
Thermally Stable ◽  
Highly Active ◽  
Electrochemical Devices ◽  
Ceria Catalysts ◽  
Solid Oxide Cell

Single-atom Pt/ceria catalysts are extremely active and thermally stable at over 700 °C in high-temperature solid oxide cell electrodes.

Microemulsion-Templated Synthesis of Highly Active High-Temperature Stable Partial Oxidation Catalysts

2002 ◽  
Vol 756 ◽  
Author(s):  
Mark Kirchhoff ◽  
Ullrich Specht ◽  
Götz Veser
Keyword(s):  
High Temperature ◽  
Partial Oxidation ◽  
Sol Gel ◽  
Oxidation Reactions ◽  
Templated Synthesis ◽  
Long Term Stability ◽  
Oxidation Of Methane ◽  
Highly Active ◽  
Sol Gel Synthesis

ABSTRACTHighly active catalysts for high-temperature partial oxidation reactions have been synthesized based on a microemulsion-templated sol-gel synthesis. The catalysts were tested with the direct catalytic oxidation of methane to synthesis gas and showed excellent selectitivites towards syngas combined with very high activity and low ignition temperatures. Furthermore, a surprisingly high long term stability was observed at these high-temperature conditions of T > 900°C. The catalyst therefore seem very promising candidates for high-temperature partial oxidation and hydrogen production from hydrocarbon fuels.

Synthesis and characterization of two novel second-order nonlinear optical chromophores based on julolidine donors with excellent electro-optic activity

RSC Advances ◽  
2016 ◽  
Vol 6 (102) ◽  
pp. 99743-99751 ◽  
Author(s):  
Hua Zhang ◽  
Fuyang Huo ◽  
Fenggang Liu ◽  
Zhuo Chen ◽  
Jialei Liu ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Second Order ◽  
Synthesis And Characterization ◽  
Electro Optic ◽  
Nlo Chromophores ◽  
Nonlinear Optical Chromophores ◽  
Optical Chromophores

Second order NLO chromophores with julolidine donor.

High Performance Side-Chain Polyquinolines and Perfluorocyclobutane-Containing Thermoset Polymers for Electro-Optic Applications

1999 ◽  
Vol 598 ◽  
Author(s):  
Hong Ma ◽  
Jianyao Wu ◽  
Petra Herguth ◽  
Baoquan Chen ◽  
Ajay Purohit ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Cycloaddition Reaction ◽  
Second Order ◽  
Side Chain ◽  
Crosslinking Reaction ◽  
Modular Approach ◽  
Electro Optic ◽  
Wide Range ◽  
Thermoset Polymers ◽  
Nlo Chromophores

ABSTRACTA modular approach for making second-order nonlinear optical (NLO) side-chain aromatic polyquinolines has been developed. The synthesis provides a method for readily incorporating NLO chromophores into the pendent phenyl moieties of parent polyquinolines at the final stage via the Mitsunobu reaction. The method produces polyquinolines with a wide range of polymer backbones and offers great flexibility in the selection of NLO chromophores. These side-chain NLO polyquinolines demonstrate high electro-optic (E-O) activities (up to 35 pm/V at 830 nm and 22 pm/V at 1300 nm) and excellent tradeoffs among thermal, optical, and electrical properties.Most recently, a series of novel second-order NLO thermoset polymers containing silicon-perfluorocyclobutane (PFCB) has also been synthesized. This was accomplished via the crosslinking reaction between the di(trifluorovinylether)-containing NLO chromophores and the tris(trifluorovinylether) monomer in solid state at 180-250 °C. The radical-mediated, stepwise cycloaddition reaction offers great tolerance to very sensitive functional groups such as tricyanovinyl acceptor. A variety of NLO chromophores could be easily incorporated into these thermoset polymers compared to the modular approach. Preliminary results have indicated these polymers to possess excellent processability, low optical loss, and a combination of highly desirable thermal, nonlinear optical, and mechanical properties.

Development of highly active, thermally stable chromophores and polymers for electro-optic applications

1994 ◽  
Author(s):  
Alex K.Y. Jen ◽  
Varanasi P. Rao ◽  
K. J. Drost ◽  
Yongming Cai ◽  
Robert M. Mininni ◽  
...  
Keyword(s):  
Thermally Stable ◽  
Highly Active ◽  
Electro Optic
Sign in / Sign up

Export Citation Format

Share Document