| Transport Properties of K_xV_2O_5·nH_2O Nanocrystalline Films |
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| 作者姓名： | A.A.Bahgat H.A.Mady A.S.Abdel Moghny A.S.Abd-Rabo Samia E.Negm |
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| 作者单位： | Department of Physics;Faculty of Science;Al-Azhar University; |
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| 摘 要： | Five different compositions of K x V 2 O 5 ·nH 2 O(where x=0.00,0.0017,0.0049,0.0064 and 0.0091 mol) were prepared by the sol-gel process.Electrical conductivity and thermoelectric power were measured parallel to the substrate surface in the temperature range of 300-480 K.The electrical conductivity showed that all samples were semiconductors and that conductivity increased with increasing K content.The conductivity of the present system was primarily determined by hopping carrier mobility.The carrier density was evaluated as well.The conduction was confirmed to obey non-adiabatic small polaron hopping.The thermoelectric power or Seebeck effect,increased with increasing K ions content.The results obtained indicated that an n-type semiconducting behavior within the temperature range was investigated.
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| 关 键 词： | 纳米晶薄膜 n型半导体 属性 传输 载流子迁移率 温度范围 载流子密度 塞贝克效应 |
Transport Properties of KxV2O5·nH2O Nanocrystalline Films |
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| A.A.Bahgat,H.A.Mady,A.S.Abdel Moghny,A.S.Abd-Rabo,Samia E.Negm.Transport Properties of KxV2O5·nH2O Nanocrystalline Films[J].Journal of Materials Science & Technology,2011(10):865-872. |
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| Authors: | AABahgat HAMady ASAbdel Moghny ASAbd-Rabo Samia ENegm |
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| Affiliation: | A.A.Bahgat,H.A.Mady,A.S.Abdel Moghny,A.S.Abd-Rabo and Samia E.Negm Department of Physics,Faculty of Science,Al-Azhar University,Nasr City 11884,Cairo,Egypt |
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| Abstract: | Five different compositions of KxV2O5 ·nH2O(where x=0.00,0.0017,0.0049,0.0064 and 0.0091 mol) were prepared by the sol-gel process.Electrical conductivity and thermoelectric power were measured parallel to the substrate surface in the temperature range of 300-480 K.The electrical conductivity showed that all samples were semiconductors and that conductivity increased with increasing K content.The conductivity of the present system was primarily determined by hopping carrier mobility.The carrier density was evaluated as well.The conduction was confirmed to obey non-adiabatic small polaron hopping.The thermoelectric power or Seebeck effect,increased with increasing K ions content.The results obtained indicated that an n-type semiconducting behavior within the temperature range was investigated. |
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| Keywords: | Vanadium pentoxide xerogel Nanocrystalline film Electrical conductivity Small polaron hopping |
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