Optical study of the band structure of wurtzite GaP nanowires

Assali, Simone and Greil, Johannes and Zardo, Ilaria and Belabbes, A. and de Moor, M. W. A. and Koelling, Sebastian and Koenraad, Paul M. and Bechstedt, F. and Bakkers, Erik P. A. M. and Haverkort, Jos E. M.. (2016) Optical study of the band structure of wurtzite GaP nanowires. Journal of Applied Physics, 120 (4). 044304.

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Official URL: http://edoc.unibas.ch/53908/

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We investigated the optical properties of wurtzite (WZ) GaP nanowires by performing photoluminescence (PL) and time-resolved PL measurements in the temperature range from 4 K to 300 K, together with atom probe tomography to identify residual impurities in the nanowires. At low temperature, the WZ GaP luminescence shows donor-acceptor pair emission at 2.115 eV and 2.088 eV, and Burstein-Moss band-filling continuum between 2.180 and 2.253 eV, resulting in a direct band gap above 2.170 eV. Sharp exciton α-β-γ lines are observed at 2.140-2.164-2.252 eV, respectively, showing clear differences in lifetime, presence of phonon replicas, and temperature- dependence. The excitonic nature of those peaks is critically discussed, leading to a direct band gap of
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimental Material Physics (Zardo)
UniBasel Contributors:Zardo, Ilaria
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:AIP Publishing
Note:Publication type according to Uni Basel Research Database: Journal article
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edoc DOI:
Last Modified:09 Oct 2017 07:58
Deposited On:20 Feb 2017 13:33

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