Sodium‐Doped ZnO Nanowires Grown by High‐pressure PLD and their Acceptor‐Related Optical Properties |
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| Authors: | Zhiwen Qiu Xiaopeng Yang Jun Han Peng Zhang Bingqiang Cao Zhengfei Dai Guotao Duan Weiping Cai |
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| Affiliation: | 1. Key Lab of Inorganic Functional Material in Universities of Shandong, School of Material Science and Engineering, University of Jinan, , Jinan, 250022 China;2. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, , Hefei, 230031 China |
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| Abstract: | Sodium‐doped ZnO (ZnO:Na) nanowires were grown with a high‐pressure pulsed‐laser deposition process on silicon substrates using sputtered gold particles as catalysts. The introduction of sodium dopants into ZnO nanowires was confirmed by both X‐ray diffraction spectrum and X‐ray photoelectron spectroscopy. The morphology and microstructural changes in ZnO nanowires due to sodium doping were investigated with scanning electron microscope, high‐resolution transmission electron microscope, and Raman spectrum. Detailed photoluminescence studies of ZnO:Na nanowires revealed characteristic sodium acceptor‐related peaks, for example, neutral acceptor‐bound exciton emission (A0X, 3.356 eV), free‐to‐neutral‐acceptor emission (e, A0, 3.314 eV), and donor‐to‐acceptor pair emission (DAP, 3.241 eV). This indicated that sodium doping induces stable acceptor level with a binding energy of 133 meV in ZnO:Na nanowires. |
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