Paper Title:
Improve the Charge Balance of White Phosphorescent Organic Light Emitting Diodes Using Co-Doped Electron Transport Layer in Emitting Layer
  Abstract

White phosphorescent organic light-emitting diodes (WPHOLED) with high efficiency and low driving voltage were achieved by incorporating an electron transport material (3TPYMB) into a hole transport-type host (TCTA) as a mixed-host structure. For electrons, the emitting layer is nearly barrier-free until they reach the region of exciton formation, which keeps the driving voltage low. Therefore, improved the charge carrier balance within the emitting layer and enhanced the power efficiency of device. White PHOLED at a luminance of 1000 cd/m2 shown a driving voltage of 4.38 V, luminance efficiency of 36.1 cd/A, and power efficiency of 26.4 lm/W was observed. Furthermore, the power efficiency can be improved to 34.27 lm/W, and luminance efficiency to 46.7 cd/A by attaching a brightness enhancement film (BEF).

  Info
Periodical
Advanced Materials Research (Volumes 287-290)
Chapter
Other related topics
Edited by
Jinglong Bu, Pengcheng Wang, Liqun Ai, Xiaoming Sang, Yungang Li
Pages
3051-3055
DOI
10.4028/www.scientific.net/AMR.287-290.3051
Citation
Y. S. Tsai, L. A. Hong, F. S. Juang, K. C. Lai, C. J. Lai, G. H. Ye, P. H. Yeh, "Improve the Charge Balance of White Phosphorescent Organic Light Emitting Diodes Using Co-Doped Electron Transport Layer in Emitting Layer", Advanced Materials Research, Vols. 287-290, pp. 3051-3055, 2011
Online since
July 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Wenfa Xie, Shi Yong Liu
Abstract:Non-doped type white organic electroluminescent (EL) devices have the following structure ITO/m-MTDATA (30nm) /NPB (20-dnm) /rubrene (0.1nm)...
1799
Authors: Li Lin Zhan, Ying Lian Wang, Jun Yao Ye
Chapter 1: Mechanical Engineering
Abstract:Organic light emitting devices (OLED) with the structure of ITO/TPD(30nm) /Alq3 (40nm)/LiF/Al were prepared by vacuum thermal evaporation...
449
Authors: Gang Zhang, Xi Yan Zhang
Chapter 2: Materials Research and Processing Technology
Abstract:The OLEDs were fabricated with the structure of ITO/m-MTDATA(20nm)/NPB(10nm)/ DPVBi:BCzVBi(15 nm,x%)/TPBi(10...
96