The origin of the 2.0 eV emissions in pure and doped cadmium sulphide |
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| Affiliation: | 1. College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China;2. The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha 410007, China;3. School of Chemistry and Chemical Engineering of Guangxi University, Nanning 530004, China;1. Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, Jinhua 321004, China;2. Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou, Zhejiang 311231, China;3. Vacuum Interconnected Nanotech Workstation, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China |
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| Abstract: | This paper reports on the results of a study of the emission in the 2.0eV region of pure and silver doped cadmium sulphide. The results show that in the pure samples a single band peaking at 2.05eV was observed while in the silver doped samples up to three bands peaking at 2.05eV, 1.94eV were observed. The origin of the emission is analysed in terms of transitions of the interlevel type with donor levels 0.35eV below the conduction band and acceptor levels 0.15eV and 0.25eV above the valence band. |
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