多孔硅表面性质导致电致发光的进一步论证

被引:1
作者
张占军
李经建
张波
蔡生民
机构
[1] 北京大学化学与分子工程学院
基金
中国博士后科学基金; 高等学校博士学科点专项科研基金;
关键词
多孔硅; 电致发光; 甲酸_甲酸钠; 电解; 循环伏安;
D O I
10.13208/j.electrochem.2002.01.003
中图分类号
O657.3 [光化学分析法(光谱分析法)];
学科分类号
摘要
用荧光分光光度法现场监测多孔硅在阳极偏压下于溶液中的电致发光行为 ,该电致发光行为主要取决于多孔硅本身的表面性质 .将电致发光实验后的多孔硅样品再次电解 ,并再次进行电致发光实验 ,发现其发光性能明显改善 ;实验表明 ,多孔硅在阳极偏压下的液相电致发光机制是由表面的SiH键氧化向导带注入电子 ,并与阳极偏压注入的价带空穴进行复合而发光 ;此外 ,还发现了多孔硅于溶液中在阳极偏压下电压调制的可见光发射行为 ,并以量子限制效应对该现象进行了解释
引用
收藏
页码:9 / 14
页数:6
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