Ye Ram Cho

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We prepared highly-efficient solution-processed red phosphorescent organic light emitting diodes (PHOLEDs) with a blue common layer structure that can reasonably confine the triplet excitons inside of the red emission layer (EML) with the assistance of a bipolar exciton blocking layer. The red PHOLEDs containing EML with a 7 : 3 ratio of(More)
Carbon enrichment of austenite and carbide precipitation during martensitic transformation have been investigated in three novel low-carbon steels. Significant partitioning of carbon into retained austenite was observed in the final microstructure, because of the relatively high martensite-start temperatures. The fact that the autotempering is associated(More)
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