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;
2016-01-01
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.| File | Dimensione | Formato | |
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