Charge transport in nanoparticular thin films of zinc oxide and aluminum-doped zinc oxide

In this work, we report on the electrical characterization of nanoparticular thin films of zinc oxide (ZnO) and aluminum-doped ZnO (AZO). Temperature-dependent current–voltage measurements revealed that charge transport for both, ZnO and AZO, is well described by the Poole–Frenkel model and excellen...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2015-01, Vol.3 (7), p.1468-1472
Main Authors: Lenz, Thomas, Richter, Moses, Matt, Gebhard J., Luechinger, Norman A., Halim, Samuel C., Heiss, Wolfgang, Brabec, Christoph J.
Format: Article
Language:English
Subjects:
Aluminum
Azo
Charge transport
Constraining
Mathematical models
Nanoparticles
Nanostructure
Thin films
Zinc oxide
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Summary:In this work, we report on the electrical characterization of nanoparticular thin films of zinc oxide (ZnO) and aluminum-doped ZnO (AZO). Temperature-dependent current–voltage measurements revealed that charge transport for both, ZnO and AZO, is well described by the Poole–Frenkel model and excellent agreement between the experimental data and the theoretical predictions is demonstrated. For the first time it is shown that the nature of the charge-transport is not affected by the doping of the nanoparticles and it is proposed that the Poole–Frenkel effect is an intrinsic and universally limiting mechanism for the charge transport in nanoparticular thin films with defect states within the bandgap.
ISSN:2050-7526
2050-7534
DOI:10.1039/C4TC01969E