Abstract
AbstractWe have researched further improvement upon three‐component white OLED devices with using fluorescent materials disclosed in SID'07. The long lifetime over 70,000hr@1,000cd/m2 maintaining at a high efficiency of 20cd/A was achieved by optimization of a carrier balance with using new carrier transport materials. Performance of blue and red OLEDs were also developed in order to enhance capability of white OLEDs, respectively. A long lifetime of 50,000hr@1,000cd/m2 was achieved by a new light blue dopant BD‐5. Meanwhile, we studied phosphorescent materials for the red device to progress towards further low power consumption. A low driving voltage of 4.4V at 10mA/cm2 and a long lifetime of 100,000hr@1,000cd/m2 were realized by employing a new host material and new carrier transport materials. These materials will contribute to large‐Size OLED TVs with color filter method or lighting application for practical use.
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