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Main Title: Lithium related deep and shallow acceptors in Li-doped ZnO nanocrystals
Author(s): Rauch, Christian
Gehlhoff, Wolfgang
Wagner, Markus R.
Malguth, Enno
Callsen, Gordon
Kirste, Ronny
Salameh, Belal
Hoffmann, Axel
Polarz, Sebastian
Aksu, Ylmaz
Drieß, Matthias
Type: Article
Language Code: en
Abstract: We study the existence of Li-related shallow and deep acceptor levels in Li-doped ZnO nanocrystals using electron paramagnetic resonance (EPR) and photoluminescence (PL) spectroscopy. ZnO nanocrystals with adjustable Li concentrations between 0% and 12% have been prepared using organometallic precursors and show a significant lowering of the Fermi energy upon doping. The deep Li acceptor with an acceptor energy of 800 meV could be identified in both EPR and PL measurements and is responsible for the yellow luminescence at 2.2 eV. Additionally, a shallow acceptor state at 150 meV above the valence band maximum is made responsible for the observed donor-acceptor pair and free electron-acceptor transitions at 3.235 and 3.301 eV, possibly stemming from the formation of Li-related defect complexes acting as acceptors.
Issue Date: 27-Jan-2010
Date Available: 10-Mar-2020
DDC Class: 530 Physik
Subject(s): Li-doped ZnO nanocrystals
electron paramagnetic resonance spectroscopy
photoluminescence spectroscopy
deep Li acceptor
Sponsor/Funder: DFG, 43659573, SFB 787: Halbleiter - Nanophotonik: Materialien, Modelle, Bauelemente
Journal Title: Journal of Applied Physics
Publisher: American Institute of Physics (AIP)
Publisher Place: Melville, NY
Volume: 107
Issue: 2
Article Number: 024311
Publisher DOI: 10.1063/1.3275889
EISSN: 1089-7550
ISSN: 0021-8979
Notes: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Journal of Applied Physics 107, 024311 (2010) and may be found at
Appears in Collections:FG Optische Charakterisierung von Halbleitern » Publications

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