Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance upgrade on Thursday 4th of May 2017 from 8.00am to 9.00am (BST).

During this time our websites will be offline temporarily. If you have any questions please use the feedback button on this page. We apologise for any inconvenience this might cause and thank you for your patience.



Nature of the 550 nm emission and d0 ferromagnetism in ZnO nanocrystals revealed by H2O2 etching

Author affiliations

Abstract

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 d0 ferromagnetism was significantly enhanced. In combination with the fact that ambient O2 exposure also resulted in a significant boost of ferromagnetism in ZnO particles with different grain sizes, we surmise that adsorbed oxygen facilitates the d0 ferromagnetism in ZnO while VZn 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.

Graphical abstract: Nature of the 550 nm emission and d0 ferromagnetism in ZnO nanocrystals revealed by H2O2 etching

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 25 Nov 2016, accepted on 22 Mar 2017 and first published on 22 Mar 2017


Article type: Communication
DOI: 10.1039/C6CE02456D
Citation: CrystEngComm, 2017, Advance Article
  •   Request permissions

    Nature of the 550 nm emission and d0 ferromagnetism in ZnO nanocrystals revealed by H2O2 etching

    J. Lv and Y. Liu, CrystEngComm, 2017, Advance Article , DOI: 10.1039/C6CE02456D

Search articles by author