期刊
AIP ADVANCES
卷 1, 期 2, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3582819
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资金
- NSF [DMR-1004804]
- DOE [DE-FG02-07ER46386]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1004804] Funding Source: National Science Foundation
Zinc oxide is a promising material for blue and UV solid-state lighting devices, among other applications. Nitrogen has been regarded as a potential p-type dopant for ZnO. However, recent calculations [Lyons, Janotti, and Van de Walle, Appl. Phys. Lett. 95, 252105 (2009)] indicate that nitrogen is a deep acceptor. This paper presents experimental evidence that nitrogen is, in fact, a deep acceptor and therefore cannot produce p-type ZnO. A broad photoluminescence (PL) emission band near 1.7 eV, with an excitation onset of similar to 2.2 eV, was observed, in agreement with the deep-acceptor model of the nitrogen defect. The deep-acceptor behavior can be explained by the low energy of the ZnO valence band relative to the vacuum level. Copyright 2011 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License. [doi:10.1063/1.3582819]
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