Correlated growth of organic material tris (8-hydroxyquinoline) aluminum (Alq3) and its relation to optical properties

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作者：
Kanchibotla, Bhargava R. [1 ]
Garre, K. [2 ]
Aurongzeb, Deeder [3 ]
机构：
[1] Department of Electrical Engineering, Virginia Commonwealth University, Richmond, VA 23284, United States
[2] Department of Electrical Engineering, University of Cincinnati, Cincinnati, OH 45221, United States
[3] Department of Physics, Texas Tech University, Lubbock, TX 79401, United States
来源：
Journal of Applied Physics | 2009年 / 106卷 / 09期
关键词：
We report slow correlated growth mode in energetic cluster vapor deposited organic light emissive material tris(8-hydroxyquinoline) aluminum from 5 to 100 nm. Phase modulated atomic force microscopy shows very slow grain growth with thickness; with very small phase differences within the film. Fractal dimension calculated from correlation function shows growth process above 10 nm consistent with diffusion-limited aggregation. For low thickness (5 nm); photoluminescence measurement shows the emission peak is shifted by ∼0.4 eV toward lower wavelength. © 2009 American Institute of Physics;
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