Abstract
The absorption and the emission spectra of wurtzite GaN with some vacancy defects or impurities (VGa, VGa–ON, VGa–H, VN, VN–H, CGa, CN, Ci, SiGa, ON) were calculated by using TDDFT method with cluster models. Ga26N26H50 cluster is chosen as a basic cluster according to the predicted energy gap. The TD-B3LYP calculation results show that yellow emission of about 2.2 eV of GaN material attributes to the presence of VGa–ON complex. The other vacancy defects or impurities bring out emission of about 2.0–2.1 eV or have no effect on yellow emission of GaN.
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Acknowledgments
We gratefully acknowledge financial support from the Natural Science Foundation of China (20673019, 20303002), the key project of the Fujian Province (2005HZ01-2-6), the Foundation of State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (20090060), and the Natural Educational Department Foundation of the Ph.D. Unit (20050386003).
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Hu, XL., Li, JQ., Zhang, YF. et al. Theoretical analysis on yellow emission of gallium nitride with vacancy defects or impurities. Theor Chem Acc 123, 521–525 (2009). https://doi.org/10.1007/s00214-009-0583-3
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DOI: https://doi.org/10.1007/s00214-009-0583-3