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Photoelectric response mechanisms dependent on RuN3 and CuPc sensitized ZnO nanoparticles to oxygen gas

机译:取决于RuN3和CuPc敏化的ZnO纳米粒子对氧气的光电响应机制

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摘要

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 (I_(SPC)) 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 researeh should be valuable for fundamental science and optoelectronic device application of ZnO nanoparticles.
机译:ZnO纳米粒子通过简单的温和溶液法合成。用[Ru(dcbpy)_2(NCS)_2(dcbyp = 2,2'-联吡啶基-4,4'-二羧酸盐)](RuN3)和CuPc进行纳米晶ZnO的光谱增感。利用表面光电流技术研究了ZnO / RuN3和ZnO / CuPc在表面和界面的电子转移行为。当暴露于氧气中时,ZnO / RuN3和ZnO / CuPc的表面光电流(I_(SPC))响应分别减小和增加。通过氧气的吸附表明,表面电荷存在不同的微观机理。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。这样的研究对于ZnO纳米粒子的基础科学和光电器件应用应该是有价值的。

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