NDLI: Thiophene–Benzothiadiazole Co-Oligomers: Synthesis, Optoelectronic Properties, Electrical Characterization, and Thin-Film Patterning

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Thiophene–Benzothiadiazole Co-Oligomers: Synthesis, Optoelectronic Properties, Electrical Characterization, and Thin-Film Patterning

Content Provider	Semantic Scholar
Author	Melucci, Manuela Favaretto, Laura Zanelli, Alberto Cavallini, Massimiliano Bongini, Alessandro Maccagnani, Piera Ostoja, Paolo Derue, Gwennaelle Lazzaroni, Roberto Barbarella, Giovanna
Copyright Year	2010
Abstract	Newly synthesized thiophene (T) and benzothiadiazole (B) co-oligomers of different size, alternation motifs, and alkyl substitution types are reported. Combined spectroscopic data, electrochemical analysis, and theoretical calculations show that the insertion of a single electron-deficient B unit into the aromatic backbone strongly affects the LUMO energy level. The insertion of additional B units has only a minor effect on the electronic properties. Cast films of oligomers with two alternated B rings (B-T-B inner core) display crystalline order. Bottom-contact FETs based on films cast on bare SiO 2 show hole-charge mobilities of 1 × 10 -3 -5 × 10 -3 cm 2 V -1 s -1 and I on /I off ratios of 10 5 -10 6 . Solution-cast films of cyclohexyl-substituted compounds are amorphous and do not show FET behavior. However, the lack of order observed in these films can be overcome by nanorubbing and unconventional wet lithography, which allow for fine control of structural order in thin deposits.
Starting Page	445
Ending Page	452
Page Count	8
File Format	PDF HTM / HTML
DOI	10.1002/adfm.200901424
Alternate Webpage(s)	https://docnum.umons.ac.be/Access/WebOpenAccess/GetDocument.aspx?Filename=cmn423.pdf&GuidTicket=123feb5b-dfde-4a0d-a5f1-714f95e9fd3d
Alternate Webpage(s)	https://doi.org/10.1002/adfm.200901424
Volume Number	20
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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