Unsubstituted thiophene–diketopyrrolopyrrole conjugated polymer thin films via oxidative chemical vapor deposition – electronic behavior

• Published in: Materials advances Vol. 4; no. 12; pp. 2625 - 2635
• Main Authors: Charyton, Marek K., Reiker, Tobias, Kotwica, Kamil, Góra, Monika, Zacharias, Helmut, Boscher, Nicolas D.
• Format: Journal Article
• Language: English
• Published: 19-06-2023
• ISSN: 2633-5409; 2633-5409
• DOI: 10.1039/D3MA00197K

Conjugated polymers (CPs) based on diketopyrrolopyrrole (DPP) constitue an important class of high-performance organic semiconductors. While
N
-alkylation of DPP is required for the solution-based synthesis of DPP-based CPs, oxidative chemical vapour deposition (oCVD) is shown to provide a straightforward solventless and scalable approach for the facile polymerisation of
N
-unsubstituted DPP. The oCVD reaction of 3,6-di(2-thienyl)-2,5-dihydropyrrolo[3,4-
c
]pyrrole-1,4-dione (TDPP) yields polymer thin films combining H-bonding and conjugated covalent bonds, resulting in a superior conductivity and a systematic increase of the lifetime of electronically excited states compared to
N
-alkylated counterparts.