Thickness for optimizing of organic layer and multi-layer anode on luminance efficiency in white-light top-emission organic light-emitting diodes

Jian-Ji Huang, Herng-Yih Ueng, Yan-Kuin Su, Shin-Ju Lin, Fuh-Shyang Juang
Journal of Nanoscience and Nanotechnology 2008, 8 (10): 5176-80
The multilayer contact structures in both the anode and organic layers for top-emission organic light emitting diodes (TEOLEDs) are studied in this paper. The anode consists of aluminum/gold (Al/Au). The Al is used for high reflectivity and Au for high work function by enhancing the hole injection from the anode into the organic hole injection layer. The organic layer thicknesses on the luminance characteristics were studied. The hole injection (HIL), hole transport (HTL) and electron transport layer (ETL) thicknesses were adjusted to balance the electron and hole recombination ratio. A highest brightness and best luminance efficiency of 8041 cd/m2 and 3 cd/A were obtained, respectively. After optimization of each organic layer thickness, the white top-emission organic light emitting diodes (white TEOLEDs) was also studied. The white TEOLEDs were achieved using two approaches with doped concentrations adjustment (CIE coordinates at x = 0.31, y = 0.38, density of 0.6%) and doped positions adjustment with CIE coordinates at x = 0.30, y = 0.34 at position = 15 nm away from carriers recombination interface.

Full Text Links

Find Full Text Links for this Article


You are not logged in. Sign Up or Log In to join the discussion.

Related Papers

Remove bar
Read by QxMD icon Read

Save your favorite articles in one place with a free QxMD account.


Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"