Abstract
Efficient electrical conversion into a wide range of optical wavelengths as well as low fabrication costs are some of the attractions of organic thin films which drive the use of these materials for flat-panel display applications [1]. Since the pioneering work of Tang and VanSlyke in 1987 [2], the organometallic material tris-(8-hydroxyquinoline)-aluminum (ALQ) has been the focus of intense research. This compound electroluminesces in the green region of the spectrum over a broad spectrum peaked near 520 nm. Although ALQ microcavity architectures can provide narrowband emissions at select wavelengths [3], the resulting brightnesses in the blue and red regions are limited by the decreasing spectral content in the tails of the ALQ emission spectrum.
© 1995 Optical Society of America
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