Title :
Electric field-induced color switching of luminescence from ZnO nanoparticle/polymer nanostructure
Author :
Panin, G.N. ; Kang, T.W. ; Aleshin, A.N. ; Baranov, A.N. ; Khotina, I.A.
Author_Institution :
Dept. of Phys., Dongguk Univ., Seoul, South Korea
Abstract :
We report on reversible switching induced by an electric field between blue-green and red cathodoluminescence (CL) in the ZnO:Mg nanoparticles/poly(4,4´-diphenylene diphenylvinylene) (PDPV) nanostructure. It has been found that PDPV-ZnO:Mg nanostructures shows the CL emission maximum in the blue-green region without an electric field. The positive bias voltage suppressed the blue-green emission and shifted the emission maximum to the red region. The mechanism for the formation of the exited states in PDPV-ZnO:Mg nanostructures is discussed. It implies the presence of radiative recombination channels, which can be adjusted by a biased voltage to the free carrier depletion or accumulation mode.
Keywords :
cathodoluminescence; electro-optical switches; excited states; filled polymers; magnesium; nanocomposites; nanoparticles; spectral line shift; wide band gap semiconductors; zinc compounds; PDPV-ZnO:Mg nanostructures; ZnO nanoparticle; ZnO:Mg nanoparticles; accumulation mode; blue-green cathodoluminescence; blue-green emission; electric field-induced color switching; emission maximum shifting; exited states; free carrier depletion; luminescence; poly(4,4´-diphenylene diphenylvinylene); polymer nanostructure; radiative recombination channels; red cathodoluminescence; reversible switching; Chemical technology; Chemistry; Electrodes; Luminescence; Nanoparticles; Polymers; Radiative recombination; Semiconductor materials; Voltage; Zinc oxide;
Conference_Titel :
Advanced Optoelectronics and Lasers, 2005. Proceedings of CAOL 2005. Second International Conference on
Print_ISBN :
0-7803-9130-6
DOI :
10.1109/CAOL.2005.1553910
