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Electrical conduction in organic polyiodide chain complexes
Author(s) -
Oza Ajay
Publication year - 1984
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170190522
Subject(s) - chemistry , arrhenius equation , charge carrier , electrical resistivity and conductivity , activation energy , thermal conduction , iodine , organic semiconductor , condensed matter physics , materials science , organic chemistry , physics , quantum mechanics , composite material
The electrical conductivities of three organic polyiodide chain complexes, α‐cyclodextrin‐KI‐I 2 · 4 H 2 O amylose‐iodine and (coumarin) 4 ‐KI‐I 2 are observed to be decreased at high pressure upto 80 Kilobars along the direction of iodine chains. The lowering of conductivities at high pressures and the Arrhenius‐type temperature dependences are explained with disordered semiconductor model. The disordered environement of polyiodide chain which lead to weak or strong localization of the charge carriers is discussed. The charge carriers move by thermally‐activated hopping with the energies away from the Fermi energy level.