【摘要】 以曲拉通为修饰剂,通过水热法合成花状Sn_1-xCr_xS₂纳米晶（x=0、0.01、0.03、0.05和0.07）,研究Cr掺杂浓度对样品的晶体结构、形貌和光学性能的影响。XRD、EDS和XPS结果表明,所有样品具有结晶良好的六方纤锌矿结构,Cr³⁺以替代Sn⁴⁺的形式掺杂进入到SnS₂晶格中。随着Cr掺杂量的增加,晶格常数发生膨胀。紫外可见吸收光谱（UV-vis）发现掺杂样品的光学带隙发生蓝移现象。傅里叶红外光谱（FT-IR）的吸收峰位并没有随着掺杂浓度的增加而发生变化。掺杂SnS₂样品的光致发光（PL）谱图出现紫光、蓝光、黄光和红光4个发光峰。随着掺杂浓度增加,发光强度呈现明显的减小趋势,以纳米花Sn_0.95Cr_0.05S₂样品的最低。色度图CIE表明,Sn_1-xCr_xS₂样品显示黄色荧光发光。更多还原

【Abstract】 With Cr doping concentration, the impact of performance on crystal structure, morphology and optical properties of the nanoflower-like Sn_1-xCr_xS₂（x=0, 0.01, 0.03, 0.05 and 0.07） synthesized by hydrothermal method with triton as modifier were investigated. The XRD, EDS and XPS results show all the samples possess a well-crystallized hexagonal wurtzite structure, while the doping of Cr³⁺ in the sample is substituted in the form of Sn⁴⁺. The lattice constant expands with the increase of Cr doping. The UV-vis absorption spectra reveal the optical band gaps of doped samples occur blueshift. The absorption peak of Fourier transform infrared spectroscopy（FT-IR） do not change with increasing doping concentration. The photoluminescence（PL） spectra show that the SnS₂ samples possess four peaks, which is purple, blue, yellow and red. The luminescence intensity of the Sn_0.95Cr_0.05S₂ nanoflowers is the lowest with a significant decrease trend. CIE results demonstrate that the Sn_1-xCr_xS₂ samples show yellow fluorescence emission.更多还原