Identification of a Nitrogen-related acceptor in ZnO nanowires. Issue 22 (29th May 2019)
- Record Type:
- Journal Article
- Title:
- Identification of a Nitrogen-related acceptor in ZnO nanowires. Issue 22 (29th May 2019)
- Main Title:
- Identification of a Nitrogen-related acceptor in ZnO nanowires
- Authors:
- Stehr, Jan E.
Chen, Shula L.
Chen, Weimin M.
Cai, Li
Shen, Shaohua
Buyanova, Irina A. - Abstract:
- Abstract : First unambiguous chemical identification of acceptors deliberately introduced in ZnO nanostructures, which is important for ZnO's future electronic applications. Abstract : Nanostructured ZnO, such as ZnO nanowires (NWs), is a promising material system for a wide range of electronic applications ranging from light emission to water splitting. Utilization of ZnO requires development of effective and controllable p-type doping. Nitrogen is considered among key p-type dopants though the exact origin of N-induced acceptors is not fully understood, especially in the case of nanostructured ZnO. In this work we employ electron paramagnetic resonance (EPR) spectroscopy to characterize N-related acceptors in ZnO NWs. N doping was achieved using ion implantation commonly employed for these purposes. We show that the Fermi level position is lowered in the N implanted NWs, indicating the formation of compensating acceptors. The formed acceptor is unambiguously proven to involve an N atom based on a resolved hyperfine interaction with a 14 N nucleus with a nuclear spin I = 1. The revealed center is shown to act as a deep acceptor with an energy level located at about 1.1 eV above the top of the valence band. This work represents the first unambiguous identification of acceptors deliberately introduced in ZnO nanostructures. It also shows that the configuration and electronic structure of the N-related acceptors in nanostructures differ from those in ZnO bulk and thin-films.Abstract : First unambiguous chemical identification of acceptors deliberately introduced in ZnO nanostructures, which is important for ZnO's future electronic applications. Abstract : Nanostructured ZnO, such as ZnO nanowires (NWs), is a promising material system for a wide range of electronic applications ranging from light emission to water splitting. Utilization of ZnO requires development of effective and controllable p-type doping. Nitrogen is considered among key p-type dopants though the exact origin of N-induced acceptors is not fully understood, especially in the case of nanostructured ZnO. In this work we employ electron paramagnetic resonance (EPR) spectroscopy to characterize N-related acceptors in ZnO NWs. N doping was achieved using ion implantation commonly employed for these purposes. We show that the Fermi level position is lowered in the N implanted NWs, indicating the formation of compensating acceptors. The formed acceptor is unambiguously proven to involve an N atom based on a resolved hyperfine interaction with a 14 N nucleus with a nuclear spin I = 1. The revealed center is shown to act as a deep acceptor with an energy level located at about 1.1 eV above the top of the valence band. This work represents the first unambiguous identification of acceptors deliberately introduced in ZnO nanostructures. It also shows that the configuration and electronic structure of the N-related acceptors in nanostructures differ from those in ZnO bulk and thin-films. The present findings are of importance for understanding the electronic properties of nanostructured ZnO required for its future electronic applications. … (more)
- Is Part Of:
- Nanoscale. Volume 11:Issue 22(2019)
- Journal:
- Nanoscale
- Issue:
- Volume 11:Issue 22(2019)
- Issue Display:
- Volume 11, Issue 22 (2019)
- Year:
- 2019
- Volume:
- 11
- Issue:
- 22
- Issue Sort Value:
- 2019-0011-0022-0000
- Page Start:
- 10921
- Page End:
- 10926
- Publication Date:
- 2019-05-29
- Subjects:
- Nanoscience -- Periodicals
Nanotechnology -- Periodicals
620.505 - Journal URLs:
- http://www.rsc.org/Publishing/Journals/NR/Index.asp ↗
http://www.rsc.org/ ↗ - DOI:
- 10.1039/c9nr03100f ↗
- Languages:
- English
- ISSNs:
- 2040-3364
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 9830.266000
British Library DSC - BLDSS-3PM
British Library STI - ELD Digital store - Ingest File:
- 10835.xml