Effect of deposition rate on the charge transport in Vanadyl-phthalocyanine thin films

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• 作者：M. Raveendra Kiran ; ^{kiran.phy85@gmail.com} ; ^{kiran.phy85@nitk.ac.in} ; Hidayath Ulla ; M.N. Satyanarayan ; G. Umesh
• 关键词：Phthalocyanine ; Charge transport ; Impedance ; Charge hopping ; Ac conductivity ; Hole mobility
• 刊名：Synthetic Metals
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：224
• 期：Complete
• 页码：63-71
• 全文大小：3214 K
• 卷排序：224

文摘

VOPc based diodes are fabricated at three different deposition rates 0.1, 1 and 5 Å/s. Hole mobility was estimated using SCLC regime in J-V characteristics. The conduction mechanism is space charge limited with exponential trap distribution. The charge carrier mobility measured form J-V characteristics is consistent with the mobilities estimated from Impedance measurements. The frequency dependence of dc and ac conductivity at various temperatures indicate that the dominant mechanism for charge transport is the hopping type.