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Tetracene film morphology: comparative atomic force microscopy, X-ray diffraction and ellipsometry investigations
B Gompf1, D Faltermeier, C Redling
11. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany. gompf@pi1.physik.uni-stuttgart.de
This study investigates tetracene thin films using X-ray diffraction and microscopy. Researchers established an interdigitated growth mode, revealing insights into film morphology and reaction products.
Area of Science:
- Materials Science
- Surface Science
- Thin Film Physics
Background:
- Understanding the morphology of organic thin films is crucial for device performance.
- Tetracene is a model organic semiconductor with potential applications in electronics.
Purpose of the Study:
- To investigate the influence of deposition rate on tetracene thin film morphology.
- To model the film structure and identify growth mechanisms.
- To characterize reaction products using optical properties.
Main Methods:
- X-ray diffraction (XRD) for structural analysis.
- Atomic force microscopy (AFM) for surface topography and roughness.
- Spectroscopic ellipsometry for thickness and optical properties.
Main Results:
- Detailed modeling of film morphology based on thickness and roughness.
- Establishment of an interdigitated growth mode for coexisting thin film and bulk phases.
- Identification of reaction products by comparing optical responses with quinone derivatives.
Conclusions:
- Deposition rate significantly impacts tetracene thin film morphology.
- The interdigitated growth mode provides a framework for understanding film formation.
- Optical response is a viable method for identifying reaction products in organic thin films.
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