TY - JOUR
T1 - Study of the properties of ZnO:Zn thin films obtained from ZnO/Zn/ZnO structure deposited by DC sputtering
AU - Vasquez-A, M. A.
AU - Goiz, O.
AU - Baca-Arroyo, R.
AU - Andraca-Adame, J. A.
AU - Romero-Paredes, G.
AU - Peña-Sierra, R.
N1 - Funding Information:
We are indebted to Roberto Livi and Antonio Politi for very helpful correspondence. W. N. is supported by the DFG, Sonderforschungsbereich 237. P. G. thanks Henk van Beijeren and Tomaz Prosen for discussions.
PY - 2012/12
Y1 - 2012/12
N2 - A method to manage the resistivity of n-type ZnO films is presented. It involves the controlled diffusion of Zn at low temperature in N2 atmosphere into the ZnO/Zn/ZnO structure. The structures were made by DC sputtering technique. The diffusion periods were varied from 5 to 30 min. This process allow us to obtain ZnO films with excess of Zn (ZnO:Zn). The electrical characterization showed that the resistivity of the films can be varied from 0.01 to 100 Ω-cm, the electron concentration from 1019 to 1017 cm-3 and the carrier mobility from 10 to 40 cm 2/V-s. The films are nanocrystalline with preferred (002) orientation and crystal size that varies from 13 to 20 nm depending on the diffusion period. The films have a band gap of 3.18 eV and 70% of transmittance in the visible region, these properties were obtained from the transmittance measurements of low-resistivity films. Films have good structural, optical and electrical properties, and could be used in the manufacture of light emitting diodes.
AB - A method to manage the resistivity of n-type ZnO films is presented. It involves the controlled diffusion of Zn at low temperature in N2 atmosphere into the ZnO/Zn/ZnO structure. The structures were made by DC sputtering technique. The diffusion periods were varied from 5 to 30 min. This process allow us to obtain ZnO films with excess of Zn (ZnO:Zn). The electrical characterization showed that the resistivity of the films can be varied from 0.01 to 100 Ω-cm, the electron concentration from 1019 to 1017 cm-3 and the carrier mobility from 10 to 40 cm 2/V-s. The films are nanocrystalline with preferred (002) orientation and crystal size that varies from 13 to 20 nm depending on the diffusion period. The films have a band gap of 3.18 eV and 70% of transmittance in the visible region, these properties were obtained from the transmittance measurements of low-resistivity films. Films have good structural, optical and electrical properties, and could be used in the manufacture of light emitting diodes.
KW - DC sputtering
KW - Electrical properties
KW - Nanocrystalline films
KW - Thin films
KW - ZnO: Zn films
UR - http://www.scopus.com/inward/record.url?scp=84876226505&partnerID=8YFLogxK
U2 - 10.1166/jnn.2012.6744
DO - 10.1166/jnn.2012.6744
M3 - Artículo
SN - 1533-4880
VL - 12
SP - 9234
EP - 9237
JO - Journal of Nanoscience and Nanotechnology
JF - Journal of Nanoscience and Nanotechnology
IS - 12
ER -