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1990年多孔硅室温可见光发射的报道引起了科技界的极大关注.现已形成了一个对硅材料研究很活跃的领域.目前的研究焦点主要集中在以下几方面:(1)发光机理的探讨;(2)改善发光的稳定性,提高发光的量子产率及制备各色光的多孔硅量子线阵列;(3)研制多孔硅光电器件;(4)发光的化学碎灭特性及其应用的研究. 我们研究了三类有机溶剂对多孔硅光致发光的猝灭作用。烷烃不猝灭发光(包括环己烷、正庚烷和溴乙烷等),而且还有很弱的增敏作用.但苯具有弱的猝灭效应.气相浓度(以氮气作稀释气体)为 1.9 × 10~(-3) mol/L时,猝灭了发光强度的15％,猝灭过程光谱没有蓝移或红移.含氧有机溶剂,包括甲醇、乙醇、四氢呋喃、二氧六环、环氧氯丙烷、乙醚、苯甲醚、乙酸乙酯、乙酸甲酯、丙酮和丁酮等,它们的猝
The report of room temperature visible light emission of porous silicon in 1990 has aroused great concern of the scientific and technological community.An area of active research on silicon materials has been formed.Current research focuses mainly on the following aspects: (1) Discussion on the mechanism of light emission ; (2) improving the stability of luminescence, increasing the quantum yield of light emission and preparing a porous silicon quantum wire array of various colors of light; (3) developing a porous silicon photoelectric device; (4) studying the chemical fragmentation characteristics of luminescence and its application We studied the quenching effect of three kinds of organic solvents on photoluminescence of porous silicon. Alkanes do not quench luminescence (including cyclohexane, n-heptane and ethyl bromide, etc.), but also a weak sensitizing effect.But benzene has a weak quenching effect.Gas concentration (with nitrogen as diluent gas) is 1.9 × 10 ~ (-3) mol / L quenched the luminescence intensity of 15%, there was no blue shift or red shift in the quenching spectrum.The organic solvent containing oxygen, including methanol, ethanol, tetrahydrofuran, dioxane, Epichlorohydrin, ether, anisole, ethyl acetate, methyl acetate, acetone and butanone, etc., their quenching