High-Quality p-Type ZnO Films Grown by Co-Doping of N and Te on Zn-Face ZnO Substrates
This article will report the epitaxial growth of high-quality p-type ZnO layers on Zn-face ZnO substrates by nitrogen and tellurium (N+Te) co-doping. ZnO:[N+Te] films show p-type conductivity with a hole concentration of $4\times 10^{16}$ cm -3 , while ZnO:N shows n-type conduction. The photolumines...
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Published in | Applied physics express Vol. 3; no. 3; pp. 031103 - 031103-3 |
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Main Authors | , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
The Japan Society of Applied Physics
01.03.2010
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Online Access | Get full text |
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Summary: | This article will report the epitaxial growth of high-quality p-type ZnO layers on Zn-face ZnO substrates by nitrogen and tellurium (N+Te) co-doping. ZnO:[N+Te] films show p-type conductivity with a hole concentration of $4\times 10^{16}$ cm -3 , while ZnO:N shows n-type conduction. The photoluminescence of ZnO:N shows broad bound exciton emission lines. Meanwhile, ZnO:[N+Te] layers show dominant A 0 X emission line at 3.359 eV, with a linewidth as narrow as 1.2 meV. Its X-ray linewidth shows narrower line width of 30 arcsec. Detailed investigation of photoluminescence properties of (N+Te) codoped ZnO layers suggest that the binding energy of N acceptors lies in a range of 121--157 meV. |
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Bibliography: | Carrier concentration and conductivity type of ZnO layers against Te flux for 0--0.06 $Å$/s. Open circle ( ) shows undoped ZnO, while closed circles ( ) show N-doped ZnO. The insets show the magnetic field dependence of Hall voltages of (a) u-ZnO (sample A) and (b) ZnO:[N+Te] (sample C). The magnetic field is varied for $-3.5$ to +3.5 kG. 10 K photoluminescence spectra of the near band emission lines of u-ZnO (sample A), ZnO:N (sample B) and ZnO:[N+Te] (sample C) films. Temperature-dependence of the PL spectrum of ZnO:[N+Te] (sample C) grown with Te flux of 0.03 $Å$/s in the temperature range of 10 K to RT. |
ISSN: | 1882-0778 1882-0786 |
DOI: | 10.1143/APEX.3.031103 |