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Proceedings Paper

High-efficiency white OLEDs based on small molecules
Author(s): Tukaram K. Hatwar; Jeffrey P. Spindler; M. L. Ricks; Ralph H. Young; Yuuhiko Hamada; N. Saito; Kazunobu Mameno; Ryuji Nishikawa; Hisakazu Takahashi; G. Rajeswaran
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Paper Abstract

Eastman Kodak Company and SANYO Electric Co., Ltd. recently demonstrated a 15" full-color, organic light-emitting diode display (OLED) using a high-efficiency white emitter combined with a color-filter array. Although useful for display applications, white emission from organic structures is also under consideration for other applications, such as solid-state lighting, where high efficiency and good color rendition are important. By incorporating adjacent blue and orange emitting layers in a multi-layer structure, highly efficient, stable white emission has been attained. With suitable host and dopant combinations, a luminance yield of 20 cd/A and efficiency of 8 lm/W have been achieved at a drive voltage of less than 8 volts and luminance level of 1000 cd/m2. The estimated external efficiency of this device is 6.3% and a high level of operational stability is observed. To our knowledge, this is the highest performance reported so far for white organic electroluminescent devices. We will review white OLED technology and discuss the fabrication and operating characteristics of these devices.

Paper Details

Date Published: 16 February 2004
PDF: 8 pages
Proc. SPIE 5214, Organic Light-Emitting Materials and Devices VII, (16 February 2004); doi: 10.1117/12.514536
Show Author Affiliations
Tukaram K. Hatwar, Eastman Kodak Co. (United States)
Jeffrey P. Spindler, Eastman Kodak Co. (United States)
M. L. Ricks, Eastman Kodak Co. (United States)
Ralph H. Young, Univ. of Rochester (United States)
Yuuhiko Hamada, SANYO Electric Co. Ltd. (Japan)
N. Saito, SANYO Electric Co. Ltd. (Japan)
Kazunobu Mameno, SANYO Electric Co. Ltd. (Japan)
Ryuji Nishikawa, SANYO Electric Co. Ltd. (Japan)
Hisakazu Takahashi, SANYO Electric Co. Ltd. (Japan)
G. Rajeswaran, SK Display Corp. (Japan)

Published in SPIE Proceedings Vol. 5214:
Organic Light-Emitting Materials and Devices VII
Zakya H. Kafafi; Paul A. Lane, Editor(s)

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