Effects of annealing on the conductivity of C60 thin films

A. Belu-Marian, R. Manaila, T. Stoica, A. Dragomir, M. Manciu, A. Devenyi, T. Braun

Research output: Contribution to journalArticle

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Abstract

Films of C60, at different stages of annealing of Tt = 200° and 300°C have been electrically characterized over the temperature domain from -130°C to Tt. X-ray diffraction revealed a random polycrystalline fcc structure with stacking defects of an intrinsic nature, due to deposition conditions. The value of room-temperature conductivity was found to be in the range (6.3 - 1.0)·10-10 (Ωcm)-1. In the stable annealed state the conductivity showed an activated temperature dependence above 423 K and a non-activated dependence below 330-280 K. The activation energies Ea ≈ 0.8 eV (film thickness 0.70 μm) and Ea ≈ 1.0 eV (film thickness 2.40 μm) were in good agreement with the energy gap values (1.63 eV and 2.08 eV) which were deduced from the absorption spectral dependence. Annealing decreased the non-activated contribution to conduction, extending the intrinsic conduction temperature range.

Original languageEnglish
Pages (from-to)495-509
Number of pages15
JournalFullerene Science and Technology
Volume3
Issue number5
Publication statusPublished - Sep 1995

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film thickness
Annealing
conduction
Thin films
conductivity
annealing
thin films
Film thickness
activation energy
absorption spectra
Temperature
temperature dependence
temperature
defects
room temperature
diffraction
Energy gap
x rays
Activation energy
X ray diffraction

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

Belu-Marian, A., Manaila, R., Stoica, T., Dragomir, A., Manciu, M., Devenyi, A., & Braun, T. (1995). Effects of annealing on the conductivity of C60 thin films. Fullerene Science and Technology, 3(5), 495-509.

Effects of annealing on the conductivity of C60 thin films. / Belu-Marian, A.; Manaila, R.; Stoica, T.; Dragomir, A.; Manciu, M.; Devenyi, A.; Braun, T.

In: Fullerene Science and Technology, Vol. 3, No. 5, 09.1995, p. 495-509.

Research output: Contribution to journalArticle

Belu-Marian, A, Manaila, R, Stoica, T, Dragomir, A, Manciu, M, Devenyi, A & Braun, T 1995, 'Effects of annealing on the conductivity of C60 thin films', Fullerene Science and Technology, vol. 3, no. 5, pp. 495-509.
Belu-Marian A, Manaila R, Stoica T, Dragomir A, Manciu M, Devenyi A et al. Effects of annealing on the conductivity of C60 thin films. Fullerene Science and Technology. 1995 Sep;3(5):495-509.
Belu-Marian, A. ; Manaila, R. ; Stoica, T. ; Dragomir, A. ; Manciu, M. ; Devenyi, A. ; Braun, T. / Effects of annealing on the conductivity of C60 thin films. In: Fullerene Science and Technology. 1995 ; Vol. 3, No. 5. pp. 495-509.
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AU - Manciu, M.

AU - Devenyi, A.

AU - Braun, T.

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