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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1021/acs.chemmater.0c04725
|2 doi
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|a pubmed24n1073.xml
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|a (DE-627)NLM322005442
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|a (NLM)33642680
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|a DE-627
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|e rakwb
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|a eng
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| 100 |
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|a Hofer, Sebastian
|e verfasserin
|4 aut
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|a Molecular Disorder in Crystalline Thin Films of an Asymmetric BTBT Derivative
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Revised 16.07.2022
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2021 The Authors. Published by American Chemical Society.
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|a The molecule 2-decyl-7-phenyl-[1]benzothieno[3,2-b][1]benzothiophene (Ph-BTBT-10) is an organic semiconductor with outstanding performance in thin-film transistors. The asymmetric shape of the molecule causes an unusual phase behavior, which is a result of a distinct difference in the molecular arrangement between the head-to-head stacking of the molecules versus head-to-tail stacking. Thin films are prepared at elevated temperatures by crystallization from melt under controlled cooling rates, thermal-gradient crystallization, and bar coating at elevated temperatures. The films are investigated using X-ray diffraction techniques. Unusual peak-broadening effects are found, which cannot be explained using standard models. The modeling of the diffraction patterns with a statistic variation of the molecules reveal that a specific type of molecular disorder is responsible for the observed peak-broadening phenomena: the known head-to-head stacking within the crystalline phase is disturbed by the statistic integration of reversed (or flipped) molecules. It is found that 7-15% of the molecules are integrated in a reversed way, and these fractions are correlated with cooling rates during the sample preparation procedure. Temperature-dependent in situ experiments reveal that the defects can be healed by approaching the transition from the crystalline state to the smectic E state at a temperature of 145 °C. This work identifies and quantifies a specific crystalline defect type within thin films of an asymmetric rodlike conjugated molecule, which is caused by the crystallization kinetics
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|a Journal Article
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|a Unterkofler, Johanna
|e verfasserin
|4 aut
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|a Kaltenegger, Martin
|e verfasserin
|4 aut
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| 700 |
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|a Schweicher, Guillaume
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ruzié, Christian
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Tamayo, Adrián
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Salzillo, Tommaso
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Mas-Torrent, Marta
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Sanzone, Alessandro
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Beverina, Luca
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Geerts, Yves Henry
|e verfasserin
|4 aut
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| 700 |
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|a Resel, Roland
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Chemistry of materials : a publication of the American Chemical Society
|d 1998
|g 33(2021), 4 vom: 23. Feb., Seite 1455-1461
|w (DE-627)NLM098194763
|x 0897-4756
|7 nnns
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| 773 |
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|g volume:33
|g year:2021
|g number:4
|g day:23
|g month:02
|g pages:1455-1461
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|u http://dx.doi.org/10.1021/acs.chemmater.0c04725
|3 Volltext
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