Photoelectric response mechanisms dependent on RuN3 and CuPc sensitized ZnO nanoparticles to oxygen gas
Photoelectric response mechanisms dependent on RuN3 and CuPc sensitized ZnO nanoparticles to oxygen gas
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DOI：
10.1088/0957-4484/17/18/007
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发表时间：
2006-09
期刊：
影响因子：
3.5
通讯作者：
Min Yang;Dejun Wang;Liang Peng;T. Xie;Yiyang Zhao
中科院分区：
文献类型：
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作者：
Min Yang;Dejun Wang;Liang Peng;T. Xie;Yiyang Zhao
通过一种简单温和的溶液法合成了氧化锌纳米粒子。利用[Ru(dcbpy)₂(NCS)₂（dcbyp = 2,2′ - 联吡啶 - 4,4′ - 二羧酸盐）]（RuN₃）和酞菁铜（CuPc）对纳米晶氧化锌进行了光谱敏化。采用表面光电流技术研究了ZnO/RuN₃和ZnO/CuPc在表面和界面处的电子转移行为。当暴露于氧气中时，ZnO/RuN₃和ZnO/CuPc的表面光电流（Iₛₚₑ）响应分别降低和升高。结果通过氧气吸附表明表面电荷存在不同的微观机制。本文详细讨论了氧分子与染料敏化的ZnO之间电子转移的微观过程。此类研究对于ZnO纳米粒子的基础科学和光电器件应用应该是有价值的。
ZnO nanoparticles were synthesized by a simple mild solution method. Spectral sensitization of nanocrystalline ZnO was carried out with [Ru(dcbpy)2(NCS)2 (dcbyp = 2,2′-bipyridyl-4,4′-dicarboxylate)] (RuN3) and CuPc. The electron transfer behaviours at the surface and interface in ZnO/RuN3 and ZnO/CuPc were investigated using a surface photocurrent technique. When exposed to oxygen gas, the surface photocurrent (ISPC) responses of ZnO/RuN3 and ZnO/CuPc decreased and increased, respectively. The results demonstrated through the adsorption of oxygen gas that there are different microscopic mechanisms for the surface charges. The microscopic processes of electron transfer between oxygen molecules and dye-sensitized ZnO are discussed in detail in this paper. Such research should be valuable for fundamental science and optoelectronic device application of ZnO nanoparticles.