Asymmetric N-heteroacene tetracene analogues as potential n-type semiconductors
File(s)N-heteroacene Manuscript_Accepted.docx (6.06 MB)
Accepted Version
Author(s)
Type
Journal Article
Abstract
In the search for high performance n-type organic semiconductors (OSCs) a simple strategy might be substitution of aromatic CH groups for nitrogen heteroatoms. Here, we report the synthesis and characterisation of two novel N-heteroacene compounds, namely, 1,5,12-triazatetracene (TrAT1) and 2,5,12-triazatetracene (TrAT2). Their potential as n-type materials is evaluated against 5,12-diazatetracene (DAT) by UV/vis and EPR spectroscopy, cyclic voltammetry, DFT, single crystal X-ray diffraction and thin film characterisation. Increasing the number of N-heteroatoms was found to stabilise the HOMO and LUMO leading to electron affinities for TrAT1 and TrAT2 of ca. −4 eV. Both compounds were found to exhibit columns of co-facial π-stacked molecules. For TrAT1, molecules are also linked by hydrogen bonding, while the crystal structure of TrAT2 was found to be inherently disordered. Thin films of DAT, TrAT1 and TrAT2 were grown by organic molecular beam deposition (OMBD) and found to form discontinuous films, where TrAT1 exhibited a preferential orientation.
Date Issued
2021-11-23
Date Acceptance
2021-11-18
Citation
Journal of Materials Chemistry C, 2021, 9 (47), pp.17073-17083
ISSN
2050-7526
Publisher
Royal Society of Chemistry
Start Page
17073
End Page
17083
Journal / Book Title
Journal of Materials Chemistry C
Volume
9
Issue
47
Copyright Statement
This journal is © The Royal Society of Chemistry 2021
License URL
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (E
Engineering & Physical Science Research Council (E
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000722056900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
EP/F039948/1
EP/P030548/1
EP/V048430/1
EP/M020398/1
EP/F04139X/1
Subjects
Science & Technology
Technology
Physical Sciences
Materials Science, Multidisciplinary
Physics, Applied
Materials Science
Physics
THIN-FILM TRANSISTORS
PENTACENE
SUBSTITUTION
DERIVATIVES
CRYSTAL
ACENES
STATE
Publication Status
Published
Date Publish Online
2021-11-23