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2 September 2008 High-performance OLEDs and their application to lighting
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Organic light emitting diodes (OLED) are expected to be used in next generation solid state lighting sources serving as an alternative to conventional incandescent bulbs and fluorescent lamps. OLEDs will provide the environmental benefits of possible considerable energy savings and elimination of mercury, as well as some other advantages such as thin flat shape, planar emission, and no UV emission. Recently, important properties of OLEDs such as efficiency and lifetime have been greatly improved. Additionally, for lighting applications, a high color rendering index (CRI) at the desired CIE chromaticity coordinates, high luminance and large area uniform emission, and high stability over long time operation are also required. In this paper, we describe the development and performance of our high CRI OLEDs: the conventional OLED with multiple emissive layers and the multi-unit OLED with only two emissive units (a fluorescent blue emissive unit and a phosphorescent green / red emissive unit). Related technologies for OLED lighting to obtain uniform emission at high luminance in large areas are also described.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Nobuhiro Ide, Hiroya Tsuji, Norihiro Ito, Hiroyuki Sasaki, Taisuke Nishimori, Yoshikazu Kuzuoka, Koki Fujihara, Takao Miyai, and Takuya Komoda "High-performance OLEDs and their application to lighting", Proc. SPIE 7051, Organic Light Emitting Materials and Devices XII, 705119 (2 September 2008);


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