A5070811918- Organic Light-Emitting Diodes Research
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Organic Electronics and Photovoltaics
- Luminescence and Fluorescent Materials
- Conducting polymers and applications
- Thin-Film Transistor Technologies
- Photochemistry and Electron Transfer Studies
- Liquid Crystal Research Advancements
Seoul National University of Science and Technology
2014-2019
Dow Chemical (South Korea)
2017
Green Technology Center
2016
Organic light-emitting diode (OLED) displays have been an active and intense area of research for well over a decade now reached commercial success from cell phones to large format televisions. A more thorough understanding the many different potential degradation modes which cause OLED device failure will be necessary develop next generation materials, improve lifetime, ultimately cost vs performance ratio. Each organic layers in can susceptible unique decomposition pathways, however...
Recent progress has shown that molecular orientation in vapor-deposited glasses can affect device performance. The deposition process result films where the axis of glass material is preferentially ordered to lie parallel plane substrate. Here, materials made within Dow's Electronic Materials business showed enhanced performance when molecules, as measured by variable angle spectroscopic ellipsometry, was oriented a more fashion compared other materials. For one material, anisotropic packing...
Host-guest structures are used in most state-of-the-art organic light-emitting devices, with the host transporting charge and confining excitons on guest. While often plays a critical role achieving high efficiency stability, predicting understanding these effects is persistent design challenge which slows discovery of new active materials. Closely related molecules, differ only by several functional groups, show drastically different degradation behavior. Here, we explore this observation...
Abstract We demonstrate improved stability in phosphorescent organic light‐emitting devices (OLEDs) by incorporating a wide energy gap host material into an ambipolar emissive layer. Unlike conventional mixed‐host OLEDs that combine hole‐ and electron‐transporting hosts, charge transport this device occurs primarily along the emitter, while serves to modify injection characteristics of This approach allows both width position exciton recombination zone be tuned without introducing exciplex...
We have fabricated highly efficient green phosphorescent organic light-emitting diodes by solution process. Very interestingly, we found that the device efficiency is affected interface between hole transport layer (HTL) and emission (EML). It was proved through spin cleaning process of cross-linkable HTL after curing which may affect mixing. In addition, tried to add complement manipulate such effects. As a result, significantly improved (up 72.7 cd/A) material.