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化学学报
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化学学报 ›› 2001, Vol. 59 ›› Issue (1): 28-33. 上一篇    下一篇

研究论文

吸附钌吡啶类配合物染料分子对氧化多孔硅光致 发光性质的影响

李洪亮;徐东升;郭国霖;桂琳琳;秦国刚   

  1. 北京大学物理化学研究所.北京(100871);北京大学分子动态与稳态结构国家重 点实验室;北京大学物理学系.北京(100871)
  • 发布日期:2001-01-15

Influence of the adsorbed Ru(Ⅱ) complexes on the properties of photoluminescence from the chemically oxidized proous silicon

Li Hongliang;Xu Dongsheng;Guo Guolin;Gui Linlin;Qin Guogang   

  1. Beijing Univ, Inst Phys Chem.Beijing(100871);Beijing Univ., Dept. of Physics.Beijing(100871)
  • Published:2001-01-15

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被引次数

2 | 2

化学氧化多孔硅经cis-Ru(bpy)~2(CN)~2的乙醇溶液浸泡后，发光峰位红移，强度减弱，激发态寿命缩短。而在trans-Ru(py)~4(CN)~2溶液中浸泡的氧化多孔硅的发光峰位，强度和寿命几乎没有变化。对比两个染料分子的氧化还原电位和光吸收性质得出：与trans-Ru(py)~4(CN)~2相比，cis-Ru(bpy)~2(CN)~2有一个与多孔硅发光能量接近的低能级吸收带，使得多孔硅纳米粒子向该染料分子传递能量成为可能，能量传递的发生引起了发光峰位的红移和激发态寿命的缩短，虽然伴随着发光效率的损耗，但对有目的地选择染料分子来改变多孔硅的发光峰位和获得激发态寿命尽可能小的多孔硅提供了思路，也为深入理解多孔硅的光致发光机制提供了更多的实验事实。

关键词: 吸附, 钌络合物, 联吡啶P, 光致发光, 能量传递

The sensitizers cis-Ru(bpy)~2(CN)~2 and trans-Ru(py)~4(CN)~2 had been applied to influence the photoluminescence (PL) of the chemically oxidized porous silicon (PS) by attaching them on the surface of the nanoparticles in the PS layers. The PL properties including the peak energy, the decay time and the intensity were affected by the adsorption of cis-Ru(bpy)~2(CN)~2, but not by that of trans-Ru(py)~4(CN)~2. By comparing the chemical and photo-physical properties of cis-Ru(bpy)~2(CN)~2 with those of trans-Ru(py)~4(CN)~2 we deduced that it was the energy transfer between the oxidized PS and the adsorbed cis-Ru(bpy)~2(CN)~2 that induced the change of the PL properties. Although the PL efficiency was decreased, the peak energy could be changed in some degree and the decay time of the PL was shortened. The results clew a possibility for the change of the PL properties of the oxidized PS by an energy transfer process. It also helps to understand the mechanism of the PL.

Key words: ADSORPTION, RUTHENIUM COMPLEX, BIPYRIDINE P, PHOTOLUMINESCENCE, ENERGY TRANSFER

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