Photoluminescence properties of CdS/ZnO nano-composites structure
Aiming to modification the surface optical properties, CdS/ZnO composites were synthesized by hydrothermal method. The ZnO/CdS heterostructures were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray energy dispersive spectroscopy (EDS), photoluminescence (PL) measurements at room temperature and the temperature-dependent photoluminescence treatment. In the room temperature PL spectra, the defect-related deep level emission can effectively suppresse under optimal CdS deposition condition. With the increasing of CdS deposition time to 150min, the donor bound exciton (D0X) peak showed a significantly red shift at low temperature (77K) PL speactrum. Through analysis the temperature-dependent photoluminescence spectra, we find that it was caused by acceptor bound exciton (A0X). Meanwhile, there appeared a donor-acceptor pair related emission at lower-energy side of the spectrum. The experiment demonstrated that the surface donor defects can effectively suppresse after CdS nanoparticles deposition on ZnO nanorods.
Tianyuan Luo Zhipeng Wei Jinhua Li Xuan Fang Fang Fang Fei Wang Xianghu Wang Xiaohua Wang
Changchun University of Science and Technology, Changchun, China School of Mechanical Engineering, Shanghai Dianji University, 1201 Jiang Chuan Road, Shanghai 200245
国际会议
长春
英文
1-4
2011-08-29（万方平台首次上网日期，不代表论文的发表时间）