Investigations of the Photo-Physical Properties of Novel Photo-Voltaic and Light Emitting Materials

2004 ◽  
Author(s):  
Theodore Goodson ◽  
III
Keyword(s):  
Physical Properties ◽  
Light Emitting ◽  
Photo Voltaic

Recent Progress of Open-shell Organic Magnetic Materials and Their Aggregated States

2021 ◽  
Author(s):  
Shaoqiang Dong ◽  
Zhen Li
Keyword(s):  
Physical Properties ◽  
Magnetic Materials ◽  
Recent Progress ◽  
Organic Materials ◽  
Open Shell ◽  
Light Emitting ◽  
Organic Light ◽  
Organic Magnetic Materials ◽  
New Generation

In last decades, open-shell organic materials have attracted scientists’ great attention for their new chemical and physical properties, as well as their possible applications in new generation of organic light-emitting...

Hybrid InGaAs quantum well–dots nanostructures for light-emitting and photo-voltaic applications

2015 ◽  
Vol 26 (38) ◽  
pp. 385202 ◽  
Author(s):  
S A Mintairov ◽  
N A Kalyuzhnyy ◽  
V M Lantratov ◽  
M V Maximov ◽  
A M Nadtochiy ◽  
...  
Keyword(s):  
Quantum Well ◽  
Light Emitting ◽  
Photo Voltaic ◽  
Ingaas Quantum Well

scholarly journals [Paper] Syntheses and Physical Properties of Carbazole-Phthalonitrile-Hybridized Light-Emitting Materials

2015 ◽  
Vol 3 (2) ◽  
pp. 114-120
Author(s):  
Kenta Shinohara ◽  
Yoshinori Suzuma ◽  
Takanori Nishida ◽  
Kan Wakamatsu ◽  
Akihiro Orita ◽  
...  
Keyword(s):  
Physical Properties ◽  
Light Emitting

Influence of Different Cordless Light-emitting-diode Units and Battery Levels on Chemical, Mechanical, and Physical Properties of Composite Resin

2019 ◽  
Vol 45 (4) ◽  
pp. 377-386 ◽  
Author(s):  
IO Cardoso ◽  
AC Machado ◽  
DNR Teixeira ◽  
FC Basílio ◽  
A Marletta ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Physical Properties ◽  
Composite Resin ◽  
Light Emitting Diode ◽  
Pearson Correlation ◽  
Composite Resins ◽  
Degree Of Conversion ◽  
Light Emitting ◽  
Mechanical And Physical Properties ◽  
Diametral Tensile Strength

Clinical Relevance Irradiance may decrease as the light-emitting diode (LED) is discharged. Therefore, the LED must be charged carefully to prevent the possibility of influencing the chemical, mechanical, and physical properties of composite resin. SUMMARY The aim of this study was to evaluate the influence of different light-emitting diode (LED) curing units and battery levels on the chemical, mechanical, and physical properties of composite resins. The irradiance for each cycle from full to completely discharged battery level was evaluated, for five different new cordless LED units: Optilight Color (Gnatus), Bluephase (Ivoclar), Valo (Ultradent), Radii Plus (SDI), and Radii Xpert (SDI). After the irradiance evaluation, composite resin specimens were prepared and light cured, while varying the battery level for each LED unit: high level (HL, 100%), medium level (ML, 50%), and low level (LL, 10%). The degree of conversion, diametral tensile strength, sorption, and solubility were also evaluated. Data were checked for homoscedasticity and submitted to two-way and three-way analysis of variance, depending on the test performed, followed by the Tukey test with a significance level of 95%. A negative correlation was found between irradiance and cycles of light curing, which was checked by the Pearson correlation test. Valo and Radii Xpert were not influenced by the battery level in any test performed. However, different battery levels for some LED units can influence the degree of conversion, diametral tensile strength, sorption, and solubility of composite resins.

scholarly journals Impact of the light-curing source and curing time on the degree of conversion and hardness of a composite

2013 ◽  
Vol 1 (1) ◽  
pp. 91
Author(s):  
Anderson Catelan ◽  
Caetano Tamires ◽  
Boniek Castillo Dutra Borges ◽  
Giulliana Panfiglio Soares ◽  
Bruno de Castro Ferreira Barreto ◽  
...  
Keyword(s):  
Physical Properties ◽  
Light Emitting Diode ◽  
Knoop Hardness ◽  
High Irradiance ◽  
Degree Of Conversion ◽  
Curing Time ◽  
Light Emitting ◽  
Light Curing ◽  
Ft Ir ◽  
The Impact

Adequate physical properties of the resinous materials are related to clinical longevity of adhesive restorations. The aim of this investigation was to assess the impact of light-curing source and curing time on the degree of conversion (DC) and Knoop hardness number (KHN) of a composite resin. Circular specimens (5 x 2 mm) were carried out (n = 7) of the Filtek Z250 (3M ESPE) composite. The specimens were light-cured by quartz-halogen-tungsten (QTH) XL 3000 (3M ESPE, 450 mW/cm2) or light-emitting diode (LED) Bluephase 16i (Vivadent, 1390 mW/cm2) for 20, 40, or 60 s. After 24 h, absorption spectra of composite were obtained using Spectrum 100 Optica (Perkin Elmer) FT-IR spectrometer in order to calculate the DC and, KHN was performed in the HMV-2T (Shimadzu) microhardness tester under 50-g load for 15 s dwell time. DC and KHN data were subjected to 2-way ANOVA and Tukey’s test at a pre-set alpha of 0.05. The LED showed highest DC and KHN values than QTH (p < 0.05). The increase of curing time improved the DC and KHN, all curing times with statistical difference (p < 0.05). The use of light-curing units with high irradiance and/or the time of cure increased may improve the physical properties of resin-based materials.

scholarly journals Physical Properties of 8-Substituted 5,7-Dichloro-2-Styrylquinolines as Potential Light Emitting Materials

2007 ◽  
Vol 54 (6) ◽  
pp. 1387-1394 ◽  
Author(s):  
Grace Shiahuy Chen ◽  
Rahul Subhash Talekar ◽  
Ken-Tsung Wong ◽  
Liang-Chen Chi ◽  
Ji-Wang Chern
Keyword(s):  
Physical Properties ◽  
Light Emitting

π-Conjugated systems: Can phosphole offer more than pyrrole?

2005 ◽  
Vol 77 (12) ◽  
pp. 2099-2104 ◽  
Author(s):  
Muriel Hissler ◽  
Christophe Lescop ◽  
Régis Réau
Keyword(s):  
Physical Properties ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Conjugated Systems ◽  
Organic Light

An overview of the synthesis, physical properties, and use as material for organic light-emitting diodes (OLEDs) of linear organic π-conjugated systems incorporating phosphole and thiophene rings is presented.

Sign in / Sign up

Export Citation Format

Share Document