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Journal of Electronic Materials

, Volume 48, Issue 2, pp 780–786 | Cite as

A Method of Combining the Increased Density of Acceptors with Restrained Density of Oxygen Vacancies to Fabricate p-Type Single-Crystalline ZnO Films

  • Zhiyuan Zhang
  • Jingyun Huang
  • Shanshan Chen
  • Xinhua Pan
  • Lingxiang Chen
  • Zhizhen Ye
Article
  • 33 Downloads

Abstract

Single-crystalline ZnO films with good crystal quality were grown by plasma-assisted molecular beam epitaxy (MBE) technique on c-plane sapphire substrates and implanted with fixed energy of 180-keV P and 100-keV O ions at 460°C. The implanted single-crystalline ZnO films exhibit p-Type characteristics with hole concentration in the range of 5.3 × 1017–1.5 × 1018 cm−3, hole mobilities between 1.4 cm2V−1 s−1 and 2.1 cm2V−1 s−1, and resistivities in the range of 0.672–1.832 Ωcm, as confirmed by Hall-effect measurements. The x-ray diffraction pattern of the implanted single-crystalline ZnO films exhibits (002) orientation (c-plane), with no other secondary phase appearing after ion implantation and dynamic annealing. It is deduced from x-ray photoelectron spectroscopy (XPS) and secondary ion mass spectroscopy results that P ions were effectively implanted and formed acceptor complex PZn–2VZn, acting predominantly in all acceptors and achieving the goal of increasing the density of acceptors. Raman spectra and XPS results reflect that the enhanced solubility and stability of acceptor complexes in implanted single-crystalline ZnO films are related to the reduction of the concentration of oxygen vacancies by O ion implantation, achieving the goal of restraining the density of oxygen vacancies. It is concluded that the method of combining the increased density of acceptors and the restrained density of oxygen vacancies is meaningful and feasible, and afforded excellent p-type characteristics.

Keywords

Excellent p-type characteristics acceptor native donor oxygen vacancy 

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Notes

Acknowledgments

This work was financially supported by Zhejiang Provincial Public Technology Research (LGG18E020001) and the Fundamental Research Funds for the Central Universities.

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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  1. 1.State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, School of Materials Science & EngineeringZhejiang UniversityHangzhouPeople’s Republic of China

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