The aggregation of Fe3+ and their d–d radiative transitions in ZnSe:Fe3+ nanobelts by CVD growth. Issue 6 (15th January 2018)

• Record Type: Journal Article
• Authors: Liang, B. B.; Hou, L. P.; Zou, S. Y.; Zhang, L.; Guo, Y. C.; Liu, Y. T.; Farooq, M. U.; Shi, L. J.; Liu, R. B.; Zou, B. S.
• Is Part Of: RSC advances. Volume 8:Issue 6(2018)
• Page Start: 3133
• Page End: 3139
• Publication Date: 2018-01-15
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra11356k
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Transition metal (TM) doped II–VI semiconductors have attracted great attention due to their luminescence and diluted magnetism. Abstract : Transition metal (TM) doped II–VI semiconductors have attracted great attention due to their luminescence and diluted magnetism. In this study, the Fe 3+ -doped ZnSe nanobelts (NBs) were grown by a facile CVD method. The surface morphology observed via SEM is smooth and clean and the elemental composition measured via EDS confirms that the Fe 3+ ions were incorporated into ZnSe NBs successfully. The micro-Raman scattering spectra demonstrate that the as-prepared NBs have the zinc blende structure. Furthermore, the Raman spectra of the Fe 3+ -doped NBs were compared with those of pure and Fe 2+ -doped reference samples. The former with a higher signal-to-noise ratio, an enhanced 2LO mode, a stronger LO mode redshift and a larger intensity ratio of LO/TO mode as well as the lower acoustic phonon modes confirms the better crystallization and the stronger electron–phonon coupling on Fe 3+ -incorporation. The emission of single Fe 3+ ion, assigned to the 4 T1 → 6 A1 transition, was observed at about 570 nm. Moreover, increasing the doping concentration of Fe 3+ ions caused the formation of different Fe–Fe coupled pairs in the lattice, which emitted light at about 530–555 nm for an antiferromagnetic-coupled pair, possibly due to the stacking faults and at about 620–670 nm for a ferromagnetic-coupled pair.