The photoluminescence(PL)ofsilver-decoratedzincoxide(ZnO/Ag)nanocolloidssynthesizedbypico- second laserablationinwaterwasstudied.ComparedtoZnO,asignificant enhancementofthebroad near-ultravioletPLluminescencepeakisobservedinthepresenceofAgnanoparticles(NPs),aswellas changes inthebroadmulti-componentvisibleemissionfeature.Thecomparativediscussionofthe chemical andstructuralanalysessuggeststhatthehighelectric field inproximityoftheAgNPsgivesrise to anenhancementoftheZnOexcitonoscillatorstrength.Opticalcouplingresultsintheincreaseof spontaneous emissionrateandinternalquantumefficiency oftheAg-decoratedZnOnanostructures.The presentedresultsarehelpfulforthedesignofinnovativeandhighlyperformingLEDdeviceswithspa- tially uniformoutput.

Enhanced optical response of ZnO/Agnanocolloids prepared by a picosecond laser

D'URSO, LUISA;
2016

Abstract

The photoluminescence(PL)ofsilver-decoratedzincoxide(ZnO/Ag)nanocolloidssynthesizedbypico- second laserablationinwaterwasstudied.ComparedtoZnO,asignificant enhancementofthebroad near-ultravioletPLluminescencepeakisobservedinthepresenceofAgnanoparticles(NPs),aswellas changes inthebroadmulti-componentvisibleemissionfeature.Thecomparativediscussionofthe chemical andstructuralanalysessuggeststhatthehighelectric field inproximityoftheAgNPsgivesrise to anenhancementoftheZnOexcitonoscillatorstrength.Opticalcouplingresultsintheincreaseof spontaneous emissionrateandinternalquantumefficiency oftheAg-decoratedZnOnanostructures.The presentedresultsarehelpfulforthedesignofinnovativeandhighlyperformingLEDdeviceswithspa- tially uniformoutput.
Pulsed laserablation ; ZnO ; Ag nanoparticles
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/28289
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