Min-Soo Kang

17.1: Invited Paper: Inverted OLED

We report a novel and simple method to fabricate top-emitting OLEDs having inverted structures. Contrary to the previous expectations, the inverted device provides even better device characteristics than that of the conventional OLEDs. Using the inverted OLED technology, we were able to fabricate 3.5″QVGA full-color AM-OLED devices.

A new perspective for the thermal degradation mechanism of blue BAM

A new thermal degradation mechanism for blue BAM (BaMgAl 10 O 17 :Eu 2+ ) under thermal treatment in the presence of water is proposed. The water can be originated either from the thermal treatment steps, such as organic binder baking steps, or from the atmosphere under which blue BAM is being heated. Under such thermal treatment conditions, water molecules can be easily intercalated into the conduction layers of blue BAM, resulting in not only the depreciation of luminance but also in the emission color change toward green. The intercalated water molecules in the conduction layer, where Eu 2+ ions are located along with Ba 2+ ions, are strongly associated with Eu 2+ ions, creating different coordination environments around Eu 2+ ions. In this paper, the details of changes in emission behaviors along with water content in the water intercalated blue BAMs are discussed.

5.3: Invited Paper: Pure Aluminum Metal as an Anode for High Performance OLEDs

OLEDs with pure aluminum anode were successfully fabricated due to the introduction of a new hole injection material. The devices show every practical performance including low driving voltage, long device lifetime and high uniformity.

66.1: Invited Paper: Performance of a Large‐size White OLED for Lighting Application

We present current status of OLED lighting devices developed at LG Chem. Uniformity of brightness, device longevity at high brightness level and relatively high efficiency are achieved using 10×10 cm2 one-pixel devices. Only commercially viable processes and cell structures were chosen for these experiments.