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@article{1546944,
author = {Rozbořil, Jakub and Broch, Katharina and Resel, Roland and Caha, Ondřej and Münz, Filip and Mikulík, Petr and Anthony, John E. and Sirringhaus, Henning and Novák, Jiří},
article_location = {WASHINGTON},
article_number = {7},
doi = {http://dx.doi.org/10.1021/acs.cgd.9b00213},
keywords = {ANTHRADITHIOPHENE; organic semiconductors; CRYSTALLIZATION; nucleation; POLYMORPHISM; X-ray diffraction; optical spectroscopy; FIELD-EFFECT TRANSISTORS; PERFORMANCE; annealing; thin films},
language = {eng},
issn = {1528-7483},
journal = {CRYSTAL GROWTH & DESIGN},
title = {Annealing Behavior with Thickness Hindered Nucleation in Small-Molecule Organic Semiconductor Thin Films},
url = {https://pubs.acs.org/doi/full/10.1021/acs.cgd.9b00213},
volume = {19},
year = {2019}
}
TY - JOUR
ID - 1546944
AU - Rozbořil, Jakub - Broch, Katharina - Resel, Roland - Caha, Ondřej - Münz, Filip - Mikulík, Petr - Anthony, John E. - Sirringhaus, Henning - Novák, Jiří
PY - 2019
TI - Annealing Behavior with Thickness Hindered Nucleation in Small-Molecule Organic Semiconductor Thin Films
JF - CRYSTAL GROWTH & DESIGN
VL - 19
IS - 7
SP - 3777-3784
EP - 3777-3784
PB - AMER CHEMICAL SOC
SN - 15287483
KW - ANTHRADITHIOPHENE
KW - organic semiconductors
KW - CRYSTALLIZATION
KW - nucleation
KW - POLYMORPHISM
KW - X-ray diffraction
KW - optical spectroscopy
KW - FIELD-EFFECT TRANSISTORS
KW - PERFORMANCE
KW - annealing
KW - thin films
UR - https://pubs.acs.org/doi/full/10.1021/acs.cgd.9b00213
L2 - https://pubs.acs.org/doi/full/10.1021/acs.cgd.9b00213
N2 - We introduce a comprehensive overview of spontaneous and thermal induced structure changes in thin films of the high performance small-molecular organic semiconductor 5,11-bis(triethyl silylethynyl) anthradithiophene (TES-ADT). Most importantly, we find that nucleation of the TES-ADT high temperature beta phase can be induced only for films thicker than a critical thickness, while it is hindered for thinner films. The described limited crystal phase nucleation, the circumstances of which are unique in the realm of small-molecule organic semiconductors, is explained in terms of a two step nucleation mechanism while taking into account the anisotropic surface energy of crystal grains. Furthermore, we identify changes in the optical absorption spectra observed during aging of as deposited films with a spontaneous transformation from the amorphous phase to the alpha(2) phase via the alpha(1) phase of TES-ADT. The transformation takes place on the time scale of several days. Finally, we determine temperature dependence of lattice parameters of the alpha(1) and alpha(2) phases and the lattice parameters of the beta phase. Thermal expansion of the alpha(1) phase is found to be much lower than that of the alpha(2) phase.
ER -
ROZBOŘIL, Jakub, Katharina BROCH, Roland RESEL, Ondřej CAHA, Filip MÜNZ, Petr MIKULÍK, John E. ANTHONY, Henning SIRRINGHAUS and Jiří NOVÁK. Annealing Behavior with Thickness Hindered Nucleation in Small-Molecule Organic Semiconductor Thin Films. \textit{CRYSTAL GROWTH \&{}amp; DESIGN}. WASHINGTON: AMER CHEMICAL SOC, 2019, vol.~19, No~7, p.~3777-3784. ISSN~1528-7483. Available from: https://dx.doi.org/10.1021/acs.cgd.9b00213.
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