Temperature dependence of electroluminescence in tris-(8-hydroxy) quinoline aluminum (Alq 3 ) light-emitting diode

2001 ◽  
Author(s):  
Shymal K. Saha ◽  
Yan-Kuin Su ◽  
Fuh S. Juang
Keyword(s):  
Temperature Dependence ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Hydroxy Quinoline

Anomalous Temperature Dependence of Solvent-Enhanced Dye Diffusion In Polymer Films

2002 ◽  
Vol 725 ◽  
Author(s):  
T. Graves-Abe ◽  
F. Pschenitzka ◽  
J.C. Sturm
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Temperature Dependence ◽  
Polymer Film ◽  
Light Emitting Diode ◽  
Solvent Vapor ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Thermally Driven

AbstractOne promising method to pattern full color polymer Organic Light-Emitting Diode (OLED) displays is to print dye from a pre-patterned organic film onto a spin-cast polymer and then diffuse the dye into the film at room temperature in a solvent vapor environment. This method utilizes the well-known tendency for a polymer film to absorb solvent vapor, which depresses the glass transition temperature of the polymer and dramatically increases diffusion the dye. In this work, we have studied the temperature dependence of this process. The dye coumarin 6 (C6) was transferred onto films consisting of 2-(4-biphenylyl)-5-(4-tert-butylphenyl)- 1,3,4-oxadiazole (PBD) mixed with the polymer poly(9-vinylcarbazole) (PVK). Samples were then placed on a heated stage in a chamber and exposed to acetone vapor to diffuse the C6 into the polymer film. The profile of the diffused dye was determined by depthdependent photoluminescence measurements and Secondary Ion Mass Spectroscopy. We observed that the amount of diffused dye decreased at higher temperatures, in contrast to conventional thermally-driven diffusion. The results are understood by noting that the decrease in the polymer glass-transition temperature and the corresponding rapid increase in dye diffusivity depend on the quantity of solvent absorbed by the polymer, which decreases as the temperature of the polymer is raised.

Poly(p‐phenylene vinylene)/tris(8‐hydroxy) quinoline aluminum heterostructure light emitting diode

1995 ◽  
Vol 66 (6) ◽  
pp. 653-655 ◽  
Author(s):  
C. C. Wu ◽  
J. K. M. Chun ◽  
P. E. Burrows ◽  
J. C. Sturm ◽  
M. E. Thompson ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Phenylene Vinylene ◽  
Light Emitting ◽  
Hydroxy Quinoline

Temperature dependence of electric-field induced photoluminescence from an InGaN-based light-emitting diode

2001 ◽  
Vol 89 (10) ◽  
pp. 5779-5781 ◽  
Author(s):  
Hiromitsu Kudo ◽  
Tomoyuki Tanabe ◽  
Hiroki Ishibashi ◽  
Ruisheng Zheng ◽  
Yoichi Yamada ◽  
...  
Keyword(s):  
Electric Field ◽  
Temperature Dependence ◽  
Light Emitting Diode ◽  
Light Emitting
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