Electric field induced reversible control of visible photoluminescence from ZnO nanoparticles

Details Electric field induced reversible control of visible photoluminescence from ZnO nanoparticles Electric field induced reversible control of visible photoluminescence from ZnO nanoparticles

2011-09-14

arxiv.org/abs/1109.2968v1

Appl. Phys. Lett. 98, 153109 (2011)

Physics

Condensed Matter

Materials Science

Scientific paper

10.1063/1.3578194

Reversible control of the photoluminescence of ZnO occurring in the visible range, has been achieved by application of a few volts (< 5V) to a device consisting of nanostructured ZnO film sandwiched between Indium Tin Oxide electrode and polyethylene oxide-lithium perchlorate, a solid polymer electrolyte. The photoluminescence intensity shows nearly 100% modulation with a response time less than 30 seconds, when the bias is applied at the electrolyte-electrode. A model is proposed for the observed effect that is based on defect states of ZnO and the band bending at the ZnO-electrolyte interface that can be changed by the applied bias.

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