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- Title
Intense intra-3d luminescence and waveguide properties of single Co-doped ZnO nanowires.
- Authors
Geburt, Sebastian; Röder, Robert; Kaiser, Uwe; Chen, Limei; Chu, Manh‐Hung; Segura‐Ruiz, Jaime; Martínez‐Criado, Gema; Heimbrodt, Wolfram; Ronning, Carsten
- Abstract
Successful doping of ZnO nanowires with the transition metal cobalt was achieved by ion implantation. Excellent optical activation of the incorporated Co ions was observed from nanowire ensembles after annealing. Efficient excitation of the Co ions occurs either by near resonant absorption or by energy transfer from the ZnO host. The excited Co ions decay radiatively with a lifetime of 8 ns. Intense and homogeneous Co2+ intra‐3d luminescence was observed from single nanowires with different Co concentrations in the range of 0.02– 4 at% and at various excitation powers. Spatially resolved measurements allowed the characterization of the waveguide properties of single doped nanowires. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) Part of Focus Issue on “Semiconductor Nanowires” (Eds.: Chennupati Jagadish, Lutz Geelhaar, Silvija Gradecak) Semiconductor nanowires can be successfully doped with cobalt ions using ion implantation. These luminescence centres are activated after thermal annealing and show strong light emission with desired wavelength, which is also wave guided along the nanowire. Such material systems open new possibilities for future optoelectronic nano‐devices such as light‐emitting diodes or nano‐lasers.
- Subjects
SEMICONDUCTOR doping; COBALT spectra; ZINC oxide spectra; LUMINESCENCE; WAVEGUIDES; ELECTRONIC excitation; NANOWIRES
- Publication
Physica Status Solidi - Rapid Research Letters, 2013, Vol 7, Issue 10, p886
- ISSN
1862-6254
- Publication type
Article
- DOI
10.1002/pssr.201307230