Abstract
In this paper, we describe the formatting guidelines for the SlD International Symposium Digest of Technical Papers. By downloading this template from the website, you will have the formats for your article, so that it can be electronically submitted Power efficiency (PE) of white OLEDs (WOLEDs) drastically decreases with the increase of color-rendering index (Ra). By using five emitters, we have, however, successfully fabricated a power efficient WOLED with Ra=94, PE=7.5 lm/W at 1,000 cd/m2 and Ra=92, PE= 12.5 lm/W at 100 cd/m2.