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The electrical and optical absorption properties of 5-amino −2-(aryldiazenyl) phenol (HLn) was investigated. A semiconductor behavior with two thermal activation energies for dc conduction which are in the range 0.11–0.47eV for ΔE1 at the lower region of temperature and 0.77–1.12eV for ΔE2 at higher region of temperature are observed. The ac conductivity measurement showed a dependence of σac on test...
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