硫化铜量子点的研究进展

Progress of Copper Sulfide Quantum Dots

硫化铜量子点作为一种p型半导体纳米晶,具有很强的表面等离子体共振效应、低的毒性以及独特的光学和电学性能,在光催化、生物技术、光电转换材料领域受到了极大关注。由于单分散的硫化铜量子点的制备过程复杂,效率较低,并且纯的硫化铜量子点电导率较低,这极大地限制了其在能量存储器件方面的应用。此外,由于硫化铜量子点复杂的能带结构和独特的p型半导体特性,针对硫化铜量子点的光学性能调控尚不成熟。基于此,本文综述了硫化铜量子点在制备方面的研究现状与取得的进展,介绍了硫化铜量子点的能带结构、晶体结构,及其在量子点敏化太阳能电池、光催化降解污染物、肿瘤细胞诊断与治疗等方面的研究进展,并对硫化铜量子点或Cu系量子点更进一步的研究、开发应用提出了几点建议。

As a p-type semiconductor nanocrystal,copper sulfide quantum dots have attracted much attention in the field of photocatalysis,biotechnology and photovoltaic materials for their strong localized surface plasmon resonance(LSPR)effect,low to-xicity and unique optical and electrical properties.The complicated processes and low efficiency for preparation of monodisperse copper sulfide quantum dots,and the low conductivity of pure copper sulfide quantum dots greatly limit their applications in energy sto-rage devices.In addition,because of their complex band structure and unique p-type semiconductor properties,to controll the optical properties of copper sulfide quantum dots is still a challenge.In this paper,the research status and progress about the preparation of copper sulfide quantum dots are reviewed,the band and crystal structure of copper sulfide quantum dots and their application in the field of quantum dot sensitized solar cells,photocatalytic degradation pollutants,diagnosis and treatment tumor cells,and etc are introduced.And some suggestions about the further research and applications of the copper sulfide quantum dots or Cu department quantum dots are put forward.