Dielectric spectroscopy studies of ZnO single crystal

Dielectric relaxation and charge transport induced by electron hopping in ZnO single crystal are measured by using a novocontrol broadband dielectric spectrometer. Typical Debye-like dielectric relaxation originating from electronic hopping between electronic traps and conductive band in surface Sch...

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Bibliographic Details
Published inChinese physics B Vol. 22; no. 10; pp. 529 - 532
Main Author 成鹏飞 李盛涛 王辉
Format Journal Article
LanguageEnglish
Published 01.10.2013
Subjects
Charge transport
Dielectric relaxation
Electrodes
Electronics
Insulation
Single crystals
Temperature
Zinc oxide
ZnO单晶
介电分析仪
介电弛豫
介电谱
电子跳跃
电子陷阱
电荷传输
肖特基势垒
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/22/10/107701

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Summary:Dielectric relaxation and charge transport induced by electron hopping in ZnO single crystal are measured by using a novocontrol broadband dielectric spectrometer. Typical Debye-like dielectric relaxation originating from electronic hopping between electronic traps and conductive band in surface Schottky barrier region is observed for ZnO single crystal-Au electrode system. However, after insulation of ZnO single crystal by heat treatment in rich oxygen atmosphere, dielectric relaxation and alternating current conductance are observed simultaneously in the dielectric spectra, implying that dielectric relaxation and charge transport can be induced simultaneously by electronic hopping at high temperature in an ordered system. The intrinsic correlation between local dielectric relaxation and long range charge transport offers us a new method to explore complicated dielectrics.
Bibliography:11-5639/O4
ZnO single crystal, electronic hopping, conductance, dielectric relaxation
Dielectric relaxation and charge transport induced by electron hopping in ZnO single crystal are measured by using a novocontrol broadband dielectric spectrometer. Typical Debye-like dielectric relaxation originating from electronic hopping between electronic traps and conductive band in surface Schottky barrier region is observed for ZnO single crystal-Au electrode system. However, after insulation of ZnO single crystal by heat treatment in rich oxygen atmosphere, dielectric relaxation and alternating current conductance are observed simultaneously in the dielectric spectra, implying that dielectric relaxation and charge transport can be induced simultaneously by electronic hopping at high temperature in an ordered system. The intrinsic correlation between local dielectric relaxation and long range charge transport offers us a new method to explore complicated dielectrics.
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ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/22/10/107701