Open AccessStructure and Electroluminescent Properties of Thin Tetracene Layers on Gold Island Films
Author(s) -
L. Viduta,
T. Gavrilko,
A. A. Marchenko,
V. Nechytaylo,
A. Senenko,
R. D. Fedorovich,
P. V. Shabatyn
Publication year - 2012
Publication title -
ukrainian journal of physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.213
H-Index - 17
eISSN - 2071-0194
pISSN - 2071-0186
DOI - 10.15407/ujpe57.2.260
Subject(s) - tetracene , materials science , electroluminescence , thin film , amorphous solid , optoelectronics , analytical chemistry (journal) , nanotechnology , anthracene , layer (electronics) , crystallography , chemistry , photochemistry , chromatography
The molecular structure, morphology, and electrical conductivity of thin tetracene layers obtained by the thermal vacuum deposition have been studied with the help of FTIR spectroscopy and STM/STS techniques as well. It has been shown that this preparation method does not change the tetracene molecular structure. The tetracene thin layers on the atomically smooth pyrolytic graphite surface demonstrate an amorphous structure. The local current-voltagecharacteristics (CVC) measured for tetracene films ~10 monolayers thick show a well-defined asymmetry relative to a tunnel voltage. A study of the electrical conductivity and the electroluminescence (EL) of a planar composite consisting of gold island films and tetracene layers has revealed that EL from submicron luminescent centers is observed on a superlinear section of conduction current I–V curves. The EL intensity grows with increasing voltage and becomes maximal at the CVC saturation. It is found that the EL from the nanocomposite has a 560-nm wavelength emission maximum.