Exploring Charge Transport in High-Temperature Polymorphism of ITIC Derivatives in Simple Processed Unipolar Bottom Contact Organic Field-Effect Transistor

17 January 2022 par Super Administrateur
We show that the electron mobility in films based on different derivatives of the ITIC family (ITIC, ITIC-Th and ITIC-4F) is strongly influenced by polymorphism; polymorphism specific to each molecule and depending on the annealing temperature applied to thin films. This leads to a strong increase in electron mobility compared to un-annealed films, which correlates with changes in molecular aggregation, crystallinity and domain orientation as well as intermolecular electronic coupling. Compared to the alkyl chain substitution used in ITIC-Th, fluorination in ITIC-4F leads to the highest electron mobility with 3.7×10-2 cm2/V.s at 200°C, due to the formation of highly ordered J-aggregates with enhanced intermolecular interaction.

Exploring Charge Transport in High-Temperature Polymorphism of ITIC Derivatives in Simple Processed Unipolar Bottom Contact Organic Field-Effect Transistor, Y. A. Avalos Quiroz, T. Koganezawa, P. Perkhun, E. Barulina, C. M. Ruiz, J. Ackermann, N. Yoshimoto,* and C. Videlot-Ackermann*

https://onlinelibrary.wiley.com/doi/abs/10.1002/aelm.202100743

 

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