Abstract
We report an in-situ study of stacking fault evolution in C60 thin films using grazing-incidence x-ray scattering. A Williamson-Hall analysis of the main scattering features during growth of a 15 nm film on glass indicates lattice strain as high as 6% in the first 5 nm of the film, with a decrease to 2% beyond 8 nm thickness. Deformation stacking faults along the {220} plane are found to occur with 68% probability and closely linked to the formation of a nanocrystalline powder-like film. Our findings, which capture monolayer-resolution growth, are consistent with previous work on crystalline and powder C60 films, and provide a crystallographic context for the real-time study of organic semiconductor thin films.
Highlights
We report an in-situ study of stacking fault evolution in C60 thin films using grazing-incidence x-ray scattering
plane are found to occur with 68% probability
The structure of small-molecule organic semiconductors in thin film electronic devices has been the subject of numerous studies
Summary
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