摘要
采用微波水热法,以氯化亚锡为锡源,硫化铵、硫脲、硫代乙酰胺、硫代硫酸钠等为硫源,在相同的条件下制备SnS粉体,研究了不同硫源对产物物相、形貌和光学性能的影响。采用XRD、SEM、TEM对样品的物相和形貌进行了分析。结果表明:除硫代硫酸钠外,由其他硫源制备的产物均为正交晶系的SnS粉体;通过不同的硫源可制备类球形、不规则长方体和花簇状SnS微晶。利用紫外-可见吸收光谱分析,产物的光学带隙约为1.48～1.61 eV;室温光致发光光谱表明,产物在830 nm处具有近红外发光特性。
SnS powders were synthesized by a microwave hydrothermal method using SnCl2·2H2O as Sn source and（NH4）2S,SC（NH2）2,CH3CSNH2,Na2S2O3 as S source under same reaction condition.The influence of differnent S source on the crystallization,morphology and optical properties of SnS crystallity were investigated.The phase composition and morphology of the as-prepared products were characterized by XRD,FESEM and TEM.The results indicated that the as-prepared products are orthorhombic structure except the S source of Na2S2O3.The morphology of SnS powders exhibit quasi-spheres,irregular cuboid and flower clusters structure under different S source.UV-Visible spectral analysis shows that the optical band gap of the as-prepared products is about 1.48-1.61 eV.Photoluminescence spectrum measured at room temperature shows near-infrared emission at 830 nm.PL spectrum indicated that SnS powders applying SC（NH2）2 and CH3CSNH2 as sulfur source showed strong edge-emission,but SnS nanoparticles applying（NH4）2S as sulfur source showed mainly quantum connement effect and defects.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2012年第2期430-435,共6页
Journal of Synthetic Crystals
基金
陕西省自然科学基金(2010JM6001)
国家自然科学基金(50942047)
陕西科技大学研究生创新基金资助
关键词
SnS粉体
硫源
微波水热法
光学性能
SnS powders
sulfur source
microwave hydrothermal method
optical properties
