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@ARTICLE{Asyuda:620088,
author = {Asyuda, Andika and Müller, Johannes and Gholami, Mohammad
Fardin and Zykov, Anton and Pithan, Linus and Koch,
Christoph T. and Rabe, Jürgen P. and Opitz, Andreas and
Kowarik, Stefan},
title = {{L}aser-induced tuning of crystallization in tetracene thin
films},
journal = {Physical chemistry, chemical physics},
volume = {26},
number = {38},
issn = {1463-9076},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {PUBDB-2025-00017},
pages = {24841-24848},
year = {2024},
abstract = {This study explores how laser light affects the morphology
of tetracene films, and it presents novel strategies for
improving the creation of thin films used in
(opto-)electronic devices. We demonstrate that laser light
(532 nm, 1.1 W mm$^{−2}$), applied during tetracene
deposition, not only increases grain size but also induces
photoalignment. The observed effects arise from enhanced
molecular diffusion, resulting from energy transferred by
light to the molecules after adsorption, but not from
heating the substrate surface underneath. We observe that
linearly polarized light promotes photoalignment, while
increased crystallite sizes occurs with both linear and
circular polarizations. We propose an Ostwald ripening
process facilitated by laser illumination, where smaller
crystallites get optically heated and dissolve, allowing
molecules to surmount step-edge barriers and assemble into
larger crystallites. Importantly, the crystallite sizes
achieved with laser illumination surpass those attainable by
substrate heating alone. The study demonstrates that laser
illumination acts as a promising new parameter for
controlling thin film properties and is distinct from growth
control via substrate temperature and growth rate. Light
control also includes the ability for lateral patterning,
with implications for the future of molecular materials and
their manufacturing technologies.},
cin = {FS-EC},
ddc = {540},
cid = {I:(DE-H253)FS-EC-20120731},
pnm = {631 - Matter – Dynamics, Mechanisms and Control
(POF4-631) / DFG project G:(GEPRIS)390648296 - EXC 2025:
Matters of Activity. Image Space Material (390648296)},
pid = {G:(DE-HGF)POF4-631 / G:(GEPRIS)390648296},
experiment = {EXP:(DE-MLZ)External-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {39291341},
UT = {WOS:001314296300001},
doi = {10.1039/D4CP02430C},
url = {https://bib-pubdb1.desy.de/record/620088},
}