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22 December 2015 Development of functional nano-particle layer for highly efficient OLED
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Organic light emitting diodes (OLEDs) are now widely commercialized in market due to many advantages such as possibility of making thin or flexible devices. Nevertheless there are still several things to obtain the high quality flexible OLEDs, one of the most important issues is the light extraction of the device. It is known that OLEDs have the typical light loss such as the waveguide loss, plasmon absorption loss and internal total reflection. In this paper, we demonstrate the one-step processed light scattering films with aluminum oxide nano-particles and polystyrene matrix composite to achieve highly efficient OLEDs. Optical characteristics and surface roughness of light scattering film was optimized by changing the mixing concentration of Al2O3 nano-particles and investigated with the atomic force microscopy and hazemeter, respectively.
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Jae-Hyun Lee, Min-Hoi Kim, Haechul Choi, and Yoonseuk Choi "Development of functional nano-particle layer for highly efficient OLED", Proc. SPIE 9668, Micro+Nano Materials, Devices, and Systems, 966829 (22 December 2015);

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