Time-resolved investigation of bright visible wavelength luminescence from sulfur-doped ZnO nanowires and micropowders.
Sulfur-doped zinc oxide (ZnO) nanowires grown on gold-coated silicon substrates inside a horizontal tube furnace exhibit remarkably strong visible wavelength emission with a quantum efficiency of 30%, an integrated intensity 1600 times stronger than band edge ultraviolet emission, and a spectral distribution that closely matches the dark-adapted human eye response. By comparatively studying sulfur-doped and undoped ZnO micropowders, we clarify how sulfur doping and nanostructuring affect the visible luminescence and the underlying energy transfer mechanisms.
Foreman
John V
JV
Department of Chemistry, Duke University, Durham, North Carolina 27708, USA.
Li
Jianye
J
Peng
Hongying
H
Choi
Soojeong
S
Everitt
Henry O
HO
Liu
Jie
J
D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D049449:Luminescence; D008163:Luminescent Measurements / Q000295:instrumentation* / Q000379:methods; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects* / Q000648:ultrastructure; D010316:Particle Size; D011208:Powders; D013050:Spectrometry, Fluorescence; D013455:Sulfur / Q000737:chemistry*; D013997:Time Factors; D015034:Zinc Oxide / Q000737:chemistry* / Q000528:radiation effects*
D011208:Powders; D013455:Sulfur; D015034:Zinc Oxide