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Development of Tb‐doped ZnO nanorods: Effect of nitrogen ion irradiation on luminescence and structural evolution
Author(s) -
Bayan S.,
Das U.,
Mohanta D.
Publication year - 2010
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200925525
Subject(s) - nanorod , luminescence , materials science , fluence , photoluminescence , irradiation , ion , doping , ammonium bromide , quenching (fluorescence) , photochemistry , nanotechnology , optoelectronics , pulmonary surfactant , chemical engineering , chemistry , optics , fluorescence , physics , organic chemistry , nuclear physics , engineering
Abstract In this work, we present surfactant‐(cetyl‐trimethyl ammonium bromide, CTAB) assisted solid‐state fabrication and characterization of hydroxyl‐free ZnO and Tb‐doped ZnO nanorods. 80‐MeV nitrogen ion irradiation (fluence: upto 8 × 10 12 ions/cm 2 ) was performed to explore irradiation‐induced modification in the structural and optical properties of the nanorods. In the asymmetrically broadened photoluminescence (PL) spectra of the irradiated samples, the band‐edge emission (∼370 nm) is found to be suppressed due to the dominance of the defect related emissions. Apart from ZnO‐defect‐related emissions (within 405–535 nm) due to zinc/oxygen vacancies, interstitial etc ., we have adequately identified the Tb‐related 5 D 4 – 7 F 6 and 5 D 4 – 7 F 5 transitions at ∼490 and 548 nm, respectively. At the highest fluence (8 × 10 12 ions/cm 2 ), the nanorod structural ordering is lost, which is characterized by a luminescence quenching. The nitrogen irradiation at the chosen energy/fluence, and selective Tb‐related transitions are promising for precise control over tunability in the specific luminescence patterns of interest.