Abstract
Surface photovoltage spectrum (SPS) technique is one of the powerful experimental methods for studying the attribution of electronic transition. The SPS investigation on Zn0.97Co0.03O system has been reported here. The different transitions in the material are distinguished by the electric field-induced surface photovoltage spectra (EFISPS), in which SPS is combined with the electric field-modified technique. The presence of the interaction between defects (excitonic transition) and Co2+ (charge-transfer transition) is confirmed by EFISPS. The magnetic properties are measured as a function of magnetic field and temperature. No hysteresis is observed, but Curie–Weiss temperature for Co-doped ZnO is positive.
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This work was supported by Science Foundation of the education department of Henan province (No. 2011C14003).
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Guo, S., Guo, H. & Du, Z. Investigation on electronic transitions in Co-doped ZnO by surface photovoltage spectra. Appl. Phys. A 117, 1295–1300 (2014). https://doi.org/10.1007/s00339-014-8535-8
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DOI: https://doi.org/10.1007/s00339-014-8535-8