Controllable Binary/Ternary Memory Behavior Induced by Isomerization of Phenylhydrazone Groups in Polymer Side Chains under Ultraviolet Light Condition

2021 ◽  
Author(s):  
Jian-Mei Lu ◽  
Guan Wang ◽  
Qijian Zhang ◽  
Fengjuan Zhu ◽  
Cheng Zhang ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Light Condition ◽  
Light Energy ◽  
Semiconductor Materials ◽  
Side Chains ◽  
Common Phenomenon ◽  
Polymeric Semiconductor

The damage of ultraviolet light to organic/polymeric semiconductor materials is a common phenomenon, so it becomes very important to construct a mechanism to dissipate the ultraviolet light energy by internal...

Electrical Transient Based Defect Spectroscopy in Polymeric and Organic Semiconductors

2005 ◽  
Vol 864 ◽  
Author(s):  
Y.N. Mohapatra ◽  
V. Varshney ◽  
V. Rao ◽  
Samarendra P. Singh ◽  
G.S. Samal
Keyword(s):  
Organic Semiconductors ◽  
Time Domain ◽  
Semiconductor Materials ◽  
Time Constants ◽  
Polymeric Semiconductor ◽  
Organic Diodes ◽  
Transient Spectroscopy ◽  
Stretched Exponentials ◽  
Current Transients ◽  
Large Distribution

AbstractThe relation between electrically active defects in organic and polymeric semiconductor materials and degradation of devices such as loss of luminance is currently not understood. In this paper, we study defect related charge processes using electrical transients in polymeric and organic diodes. We monitor slow charging and discharging currents as a function of time for both virgin and electrically aged devices. The current transients are analyzed spectroscopically in time domain using a technique called Time Analyzed Transient Spectroscopy, which is similar to DLTS in its implementation. We observe highly stretched exponentials over 3—4 orders of magnitude in time up to thousands of seconds indicating existence of large distribution in time constants in aged PLED devices. We demonstrate ability to distinguish between different mechanisms of charge storage related to defect related processes in typical OLED and PLED.

scholarly journals Controlled/living polymerization towards functional poly(p-phenylene vinylene) materials

2016 ◽  
Vol 7 (7) ◽  
pp. 1355-1367 ◽  
Author(s):  
N. Zaquen ◽  
L. Lutsen ◽  
D. Vanderzande ◽  
T. Junkers
Keyword(s):  
Living Polymerization ◽  
Semiconductor Materials ◽  
Phenylene Vinylene ◽  
Important Class ◽  
Polymeric Semiconductor

Poly(p-phenylene vinylene)s (PPVs) are an important class of highly fluorescent polymeric semiconductor materials.

scholarly journals Efficient ultraviolet-light energy dissipation by an aromatic ketone

2010 ◽  
Vol 46 (5) ◽  
pp. 800-802 ◽  
Author(s):  
Abdelkarim El Moncef ◽  
M. Consuelo Cuquerella ◽  
Elena Zaballos ◽  
Carmen Ramírez de Arellano ◽  
Abdeslem Ben-Tama ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Ultraviolet Light ◽  
Light Energy ◽  
Aromatic Ketone

Open discussion

1982 ◽  
Vol 99 ◽  
pp. 605-613
Author(s):  
P. S. Conti
Keyword(s):  
Buenos Aires ◽  
Large Mass ◽  
List Type ◽  
Common Phenomenon ◽  
Open Discussion ◽  
The Stability ◽  
Ring Nebulae

Conti: One of the main conclusions of the Wolf-Rayet symposium in Buenos Aires was that Wolf-Rayet stars are evolutionary products of massive objects. Some questions:–Do hot helium-rich stars, that are not Wolf-Rayet stars, exist?–What about the stability of helium rich stars of large mass? We know a helium rich star of ∼40 MO. Has the stability something to do with the wind?–Ring nebulae and bubbles : this seems to be a much more common phenomenon than we thought of some years age.–What is the origin of the subtypes? This is important to find a possible matching of scenarios to subtypes.

Cathodoluminescence of Catalyst Crystallites

1982 ◽  
Vol 40 ◽  
pp. 664-665
Author(s):  
E.D. Boyes ◽  
P.L. Gai ◽  
D.B. Darby ◽  
C. Warwick
Keyword(s):  
Defect Density ◽  
Chemical Properties ◽  
Operating Conditions ◽  
Semiconductor Materials ◽  
Environmental Cell ◽  
High Resolution Structure ◽  
Commercially Important ◽  
Crystallographic Defects ◽  
Resolution Structure

The extended crystallographic defects introduced into some oxide catalysts under operating conditions may be a consequence and accommodation of the changes produced by the catalytic activity, rather than always being the origin of the reactivity. Operation without such defects has been established for the commercially important tellurium molybdate system. in addition it is clear that the point defect density and the electronic structure can both have a significant influence on the chemical properties and hence on the effectiveness (activity and selectivity) of the material as a catalyst. SEM/probe techniques more commonly applied to semiconductor materials, have been investigated to supplement the information obtained from in-situ environmental cell HVEM, ultra-high resolution structure imaging and more conventional AEM and EPMA chemical microanalysis.

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