Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 8, Issue 13, Pages 4314-4320Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9tc06965h
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Funding
- Natural Science Foundation of China [61674107]
- RGC of Hong Kong [T42-103/16]
- Science and Technology Plan of Shenzhen Municipal for Cooperation and Innovation [JCYJ20170302150335518]
- Shenzhen Key Lab Fund [ZDSYS 20170228105421966]
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To meet device applications, it is essential to fabricate nondegenerate ZnSnN2 with higher mobility. Herein, the chemical potential of nitrogen was improved under Zn-rich sputtering conditions and nondegenerate ZnSnN2 with mobility higher than 20 cm(2) V-1 s(-1) was successfully fabricated. The properties of the samples were characterized. The obtained ZnSnN2 is wurstite. Band conduction is observed in the range 300-100 K and nearest neighbour hopping is observed in the range 100-70 K. The forbidden band gap is about 1.43 eV and Sn substituting Zn is the major donor, whose ionization energy is 34.6 meV. Improving the chemical potential of nitrogen under Zn-rich conditions effectively changes the off-stoichiometry of ZnSnN2 and unintentionally increases oxygen doping, which finally leads to a decrease in electron density and an increase in mobility.
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