ISSN:
1057-9257
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Electrical Engineering, Measurement and Control Technology
,
Physics
Notes:
Quinizarin (1,4-DHAQ) and Ag/I,4-DHAQ thin films deposited under vacuum were investigated by I-V measurements at various temperatures. It is shown that when submitted to an electric field of 5 × 105 V cm-1 or less, the I-V characteristics of AI/DHAQ/AI sandwich structures are ohmic. The temperature dependence is I ∝ exp(-ΔE/kT). The measured activation energy is 0.3 eV in the case of pure DHAQ and 30meV in the case of Ag/DHAQ. Therefore we can imagine that in the former case the conductivity is controlled by thermally activated hopping above intermolecular barriers, while in the latter case the conductivity can be attributed to tunnelling between silver grains.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/amo.860050106
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