High-efficiency fluorescent white organic light-emitting device with double emissive layers

✍ Scribed by Yu Wang; Yu-Lin Hua; Xiao-Ming Wu; Li-Juan Zhang; Qing-Chuan Hou; Qian Liu

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 181 KB
• Volume: 9
• Category: Article
• ISSN: 1566-1199
• DOI: 10.1016/j.orgel.2007.12.004

✦ Synopsis

The authors demonstrate a fluorescent white organic light-emitting device (WOLED) with double emissive layers. The yellow and blue dyes, 5,6,11,12-tetraphenylnaphthacene and N-( 4

are doping into the same conductive host material, N,N 0 -dicarbazolyl-4-4 0biphenyl). The maximum luminance and power efficiency of the WOLED are 14.6 cd/A and 9.5 lm/W at 0.01 mA/cm 2 , with the maximum brightness of 20 100 cd/m 2 at 17.8 V. The Commission International de L'E ´clairage coordinates change slightly from (0.27, 0.37) to (0.28, 0.36), as the applied voltage increases from 6 V to 16 V. The high efficiencies can be attributed to the balance between holes and electrons.