Abstract
Effect of CuCl2 doping on structural, optical, dielectric and semiconducting behavior of solution grown anthracene crystals has been reported. UV–vis spectra showed a blue shift of various peaks in the range of 350–390nm. A broad peak around 760nm of high intensity appeared in Cu2+ doped anthracene. Remarkable increase in dielectric constant and ac conductivity were observed along with a structure related phase transition at 126°C. Different mechanisms of ac conductivity for the two temperature ranges, typically below and above 60°C, were reported. A higher dependence of conductivity on temperature above 60°C established enhanced semiconducting behavior in doped crystals. Change in activation energy has been reported in different temperature regions. In photoluminescence (PL) studies, three strong blue/UV emissions were obtained at 400nm, 424nm and 450nm in both the crystals and a remarkable PL quenching has been observed in the doped anthracene.
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