Shafiqul Islam Mohammad, Deep Raj, Lin Jie, Yoshida Toshiyuki, Fujita Yasuhisa
Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan.
Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan.
Nanomaterials (Basel). 2022 Jan 22;12(3):358. doi: 10.3390/nano12030358.
In this work, nitrogen-doped ZnO nanoparticles were synthesized in various conditions by the gas evaporation method with DC arc plasma. Nitrogen concentrations of 6.38 × 10 cm to 2.6 × 10 cm were obtained at a chamber pressure of 150 torr, using arc currents of 20 A to 70 A. The intensities of local vibrational modes at 275 cm and 581 cm in the Raman spectra of ZnO nanoparticles showed a dependency on the nitrogen concentration in the ZnO nanoparticles. The ratios of donor-acceptor pair and exciton emissions in the photoluminescence spectra of nitrogen-doped ZnO nanoparticles, and the electroluminescence of light-emitting diodes based on these nanoparticles, were nearly proportional to the Raman peak's intensity at 275 cm. The results indicated that the nitrogen dopants in the ZnO nanoparticles were acting as an acceptor.
在这项工作中，采用直流电弧等离子体气体蒸发法在不同条件下合成了氮掺杂的氧化锌纳米颗粒。在150托的腔室压力下，使用20安至70安的电弧电流，获得了6.38×10厘米至2.6×10厘米的氮浓度。氧化锌纳米颗粒拉曼光谱中275厘米和581厘米处的局部振动模式强度显示出对氧化锌纳米颗粒中氮浓度的依赖性。氮掺杂氧化锌纳米颗粒光致发光光谱中施主-受主对和激子发射的比率，以及基于这些纳米颗粒的发光二极管的电致发光，几乎与275厘米处的拉曼峰强度成正比。结果表明，氧化锌纳米颗粒中的氮掺杂剂起到了受主的作用。
