The controlled modification of the electronic properties of ZnO nanorods via transition metal doping is reported. A series of ZnO nanorods were synthesized by chemical bath growth with varying Co content from 0 to 20 atomic% in the growth solution. Optoelectronic behavior was probed using cathodoluminescence, time-resolved luminescence, transient absorbance spectroscopy, and the incident photon-to-current conversion efficiency (IPCE). Analysis indicates the crucial role of surface defects in determining the electronic behavior. Significantly, Co-doping extends the light absorption of the nanorods into the visible region, increases the surface defects, and shortens the non-radiative lifetimes, while leaving the radiative lifetime constant. Furthermore, for 1 atomic% Co-doping the IPCE of the ZnO nanorods is enhanced. These results demonstrate that doping can controllably tune the functional electronic properties of ZnO nanorods for applications.

Optical properties and carrier dynamics in Co-doped ZnO nanorods / Sivan, Aswathi K.; Galán-González, Alejandro; Di Mario, Lorenzo; Tappy, Nicolas; Hernández-Ferrer, Javier; Catone, Daniele; Turchini, Stefano; Benito, Ana M.; Maser, Wolfgang K.; Simon Escobar Steinvall, Orcid; i Morral, Anna Fontcuberta; Gallant, Andrew; Zeze, Dagou A.; Atkinson, Del; Martelli, Faustino. - In: NANOSCALE ADVANCES. - ISSN 2516-0230. - 3:(2021), pp. 214-222. [10.1039/D0NA00693A]

Optical properties and carrier dynamics in Co-doped ZnO nanorods

Daniele Catone;
2021

Abstract

The controlled modification of the electronic properties of ZnO nanorods via transition metal doping is reported. A series of ZnO nanorods were synthesized by chemical bath growth with varying Co content from 0 to 20 atomic% in the growth solution. Optoelectronic behavior was probed using cathodoluminescence, time-resolved luminescence, transient absorbance spectroscopy, and the incident photon-to-current conversion efficiency (IPCE). Analysis indicates the crucial role of surface defects in determining the electronic behavior. Significantly, Co-doping extends the light absorption of the nanorods into the visible region, increases the surface defects, and shortens the non-radiative lifetimes, while leaving the radiative lifetime constant. Furthermore, for 1 atomic% Co-doping the IPCE of the ZnO nanorods is enhanced. These results demonstrate that doping can controllably tune the functional electronic properties of ZnO nanorods for applications.
2021
Nanorods; photoelectrochemistry; ultrafast spectrsocopy
01 Pubblicazione su rivista::01a Articolo in rivista
Optical properties and carrier dynamics in Co-doped ZnO nanorods / Sivan, Aswathi K.; Galán-González, Alejandro; Di Mario, Lorenzo; Tappy, Nicolas; Hernández-Ferrer, Javier; Catone, Daniele; Turchini, Stefano; Benito, Ana M.; Maser, Wolfgang K.; Simon Escobar Steinvall, Orcid; i Morral, Anna Fontcuberta; Gallant, Andrew; Zeze, Dagou A.; Atkinson, Del; Martelli, Faustino. - In: NANOSCALE ADVANCES. - ISSN 2516-0230. - 3:(2021), pp. 214-222. [10.1039/D0NA00693A]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1496562
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