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所属单位：航天学院

发表刊物：CRYSTENGCOMM

关键字：ROOM-TEMPERATURE FERROMAGNETISM DOPED ZNO ZINC-OXIDE THIN-FILMS NANOPARTICLES NANORODS VACANCY

摘要：Clarifying the origin of green photoluminescence and the room temperature ferromagnetism in ZnO is crucial for its potential application. In this work, we show that the characteristic 368 nm donor-bound exciton and the g = 1.96 electron spin resonance (ESR) signal in ZnO nanocrystals were eliminated after H2O2 oxidation, along with the appearance of 550 nm photoluminescence, unambiguously evidencing the creation of acceptor defects. Meanwhile, the d(0) ferromagnetism was significantly enhanced. In combination with the fact that ambient O-2 exposure also resulted in a significant boost of ferromagnetism in ZnO particles with different grain sizes, we surmise that adsorbed oxygen facilitates the d(0) ferromagnetism in ZnO while V-Zn causes the 550 nm green emission. This work illustrates that oxygen exposure is an efficient way to tune the physics in metal oxides through engineering defects.

ISSN号：1466-8033

是否译文：否

发表时间：2017-05-07

合写作者：Liu, Yuan

通讯作者：吕金鹏