Improved initial drop in operational lifetime of blue phosphorescent organic light emitting device fabricated under ultra high vacuum condition

2011 ◽  
Vol 99 (3) ◽  
pp. 033301 ◽  
Author(s):  
H. Yamamoto ◽  
J. Brooks ◽  
M. S. Weaver ◽  
J. J. Brown ◽  
T. Murakami ◽  
...  
Keyword(s):  
High Vacuum ◽  
Vacuum Condition ◽  
Ultra High Vacuum ◽  
Light Emitting ◽  
Organic Light ◽  
High Vacuum Condition ◽  
Operational Lifetime ◽  
Initial Drop ◽  
Ultra High Vacuum Condition ◽  
Blue Phosphorescent

Enhanced stability of organic light-emitting devices fabricated under ultra-high vacuum condition

2006 ◽  
Vol 426 (1-3) ◽  
pp. 111-114 ◽  
Author(s):  
Takeshi Ikeda ◽  
Hideyuki Murata ◽  
Yoshiki Kinoshita ◽  
Junichi Shike ◽  
Yoshikazu Ikeda ◽  
...  
Keyword(s):  
High Vacuum ◽  
Vacuum Condition ◽  
Ultra High Vacuum ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
High Vacuum Condition ◽  
Organic Light Emitting Devices ◽  
Ultra High Vacuum Condition ◽  
Enhanced Stability

Exoelectron emission from unexcited metallic glasses Fe78B13Si9 during heat treatment

1992 ◽  
Vol 7 (6) ◽  
pp. 1396-1399 ◽  
Author(s):  
Yoshihisa Watanabe ◽  
Tadayoshi Kubozoe ◽  
Yoshikazu Nakamura
Keyword(s):  
Heat Treatment ◽  
Metallic Glasses ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
Exoelectron Emission ◽  
Radiation Chemical ◽  
Temperature Range ◽  
High Vacuum Condition ◽  
Before And After ◽  
Ultra High Vacuum Condition

Exoelectron emission from the surface of unexcited metallic glasses Fe78B13Si9 during heat treatment has been studied under ultra high vacuum condition. In the first heating cycle, exoelectrons are emitted from the as-cast ribbon in the temperature range from approximately 423 K to 773 K (150 °C to 500 °C), although the surface of the specimen is not excited by ionizing radiation, chemical processes, or mechanical treatments prior to measurements. In the second and subsequent heating cycles, however, there is no anomalous emission observed in the same temperature range. In order to elucidate the mechanism of emission, the surface of the specimen is observed by the atomic force microscope (AFM) before and after measurements. In the AFM image, many crystallites in the amorphous matrix can be found in the surface of the heated specimen. These experimental results show that exoelectrons are emitted in the same temperature range as the early stages of crystallization on the surface of metallic glasses. We hypothesize that the two effects are correlated.

The Effect of Different Oxidizing Atmospheres on the Initial Kinetics of Copper Oxidation as Studied In Situ UHV-TEM

1999 ◽  
Vol 589 ◽  
Author(s):  
Mridula D. Bharadwaj ◽  
Anu Gupta ◽  
J. Murray Gibson ◽  
Judith C. Yang
Keyword(s):  
Water Vapor ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
Solid State Reactions ◽  
Copper Oxidation ◽  
High Vacuum Condition ◽  
Ultra High Vacuum Condition ◽  
Kinetics Of

AbstractEffect of moisture on the oxidation of copper was studied using in situ UHV-TEM. The ultra high vacuum condition is required for minimum contamination effects. The initial observations show that the water vapor reduces the oxide as well as reduces the rate of oxidation if both oxygen gas and water vapor are simultaneously used. Based on these observations, we have speculated on the role of moisture in the solid state reactions involved in copper oxidation

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