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Citation: LIU Zhong-Shi, JING Xi-Ping, SONG Hong-Wei, FAN Li-Bo. The Relationships between UV Emission and Green Emission in ZnO Phosphor[J]. Acta Physico-Chimica Sinica, ;2006, 22(11): 1383-1387. doi: 10.1016/S1872-1508(06)60071-5 shu

The Relationships between UV Emission and Green Emission in ZnO Phosphor

1.
Beijing National Laboratory for Molecular Sciences, The State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China; Key Laboratory of Excited State Physics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, P. R. China

Received Date: 22 June 2006
Available Online: 6 November 2006

ZnO phosphor was synthesized by annealing ZnO powder at low O2 partial pressure and in vacuum. ZnO has two emissions, which are located at about 380 nm (UV emission) and 510 nm (green emission). The UV emission can be attributed to the exciton emission, which is a single-center process, whereas the green emission is related to native defects, such as VO• and VZn′, which is a two-center (donor-acceptor) recombination process. The high-density excitation favors the UV emission, whereas the green emission likely appears in the samples annealed at low O2 partial pressure. It was shown that the energy transfer may occur from the UV emission center to the green emission center, and the exciton diffusion mechanism for the transfer was proposed.
- ZnO;Luminescence;Exciton emission;Native defect emission;Energy transfer
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