%A LU Lin;LIAO Ying-jie;LIU Ji-zhong;WEI Bin*;ZHANG Jian-hua %T Highly Efficient and Chromatic-Stability Yellow Organic Light Emitting Diodes Using Double Ultra Thin Yellow Emissive Layers %0 Journal Article %D 2010 %J SPECTROSCOPY AND SPECTRAL ANALYSIS %R 10.3964/j.issn.1000-0593(2010)08-2053-04 %P 2053-2056 %V 30 %N 08 %U {https://www.gpxygpfx.com/CN/abstract/article_4019.shtml} %8 2010-08-01 %X The authors investigated the efficiency and chromatic-stability characteristics of organic light emitting devices (OLEDs) with ultra-thin yellow emissive layers of 0.1 nm 5,6,11,12,-tetraphenylnaphthacene (rubrene) and hole block layer of BCP. The OLEDs with double thin rubrene layers and BCP layer were found to exhibit a high luminance and electroluminescence (EL) efficiency. The maximum EL efficiency and luminance reached 6.35 cd·A-1 at 6 V and 7 068 cd·m-2 at 10 V respectively. Moreover, Commission International De L’Eclairage (CIE) coordination maintained unchanged (0.49, 0.49) in the wide range of applied voltages. The enhanced efficiency and good chromatic stability were attributed to a balanced injection and transport of electrons and holes and the expected confinement and balanced recombination of the emission region in the ultra-thin rubrene layers.