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论文类型：期刊论文

发表时间：2015-03-01

发表刊物：JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS

收录刊物：SCIE、EI、Scopus

卷号：26

期号：3

页面范围：1591-1596

ISSN号：0957-4522

摘要：ZnO:Cu thin films were prepared on the sapphire substrate using low-pressure metal organic chemical vapor deposition system. The influence of Cu dopant on the structure and morphology, electrical and optical properties of ZnO was investigated. Scanning electron microscope results showed that the smooth surface morphology was made up of evenly diameter nanorod, with complete hexagonal structure at some doping point. Low temperature photoluminescence results indicated that Cu dopant introduced more than one acceptor energy level in the energy gap and the energy levels were multiple and complicated. The presence of donor and acceptor pairs suggested that acceptors were really incorporated into ZnO, and it was proposed to be Cu1+. These results confirmed that moderate Cu-dopant in ZnO could improve the optical properties and it extended a rich picture of the bound excitons emission.