In this conference the generation and uses of high magnetic fields were reviewed. The fields of application ranged from bio-magnetics on the one hand to solid state and nuclear physics on the other. In this report the emphasis is on the methods of generating magnetic fields, both steady and pulsed, and on the latest developments with high critical field superconductors, Steady fields up to 130 k~ have been generated in conventional coils, while in liquid hydrogen-cooled coils fields of about 80 kG have been produced. At the time of the conference the highest field generated in superconducting solenoids was about 69 kG, using niobium-tin. The critical field curves of another material, vanadium-gallium, V,Ga, as far as they have been measured show the possibility of critical fields rising to 500 kG at 1" K.
The transient electroluminescence (EL) of white organic light-emitting diodes (OLEDs) with blue phosphorescent and red fluorescent emissive layers was investigated by applying voltage pulses on the devices. The transient properties of a blue phosphorescence EL signal are strongly affected by the phosphorescence recombination lifetime. As a result, the transient properties of a white OLED were almost identical to those of a phosphorescent emissive layer. Utilizing the differences in transient characteristics between the fluorescent materials and Ir complexes, the emission color has been successfully tuned by varying applied pulse width and frequency.
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