Journal
SYNTHETIC METALS
Volume 287, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2022.117094
Keywords
Methoxynaphthothiophenes; X-ray structures; Redox properties; Absorption; Fluorescence; Density of states; CELIV; Charge carriers mobility
Funding
- Russian Science Foundation [RSF N?, 20-73-00352, 17-73-30036-P]
- Russian Science Foundation [20-73-00352] Funding Source: Russian Science Foundation
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A series of tricyclic naphthothiophenes - photocyclization products were studied and their HOMO and LUMO levels, as well as charge carrier mobility, were evaluated. The 8-methoxynaphtho[1,2b]thiophene showed high charge carrier mobility, which is believed to be associated with the ordering of the high conductivity axis of the microcrystals in the layers.
A series of tricyclic naphthothiophenes - photocyclization products (8-methoxynaphtho[1,2-b]thiophene; 6,7dimethoxynaphtho[1,2-b]thiophene; 8-methoxynaphtho[2,1-b]thiophene) have been studied. HOMO and LUMO levels, as well as a gap between them was accessed by cyclic voltammetry and optical spectroscopy. Double potential step chronoamperometry showed that the former naphthothiophene exhibits slower current decay than the other substances. Charge carrier mobility measured by the CELIV technique was estimated to be of the order of 10-4 cm2V- 1s- 1 for 0.2 mu m films and approaches 10-1 cm2V- 1s- 1. for the 5 mu m film of 8-methoxynaphtho[1,2b]thiophene. It is believed the high mobility is associated with the ordering of the high conductivity axis of the microcrystals in the layers.
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