title: Probing defects in nitrogen-doped Cu2O.
abstract: Nitrogen doping is a promising method of engineering the electronic structure of a metal oxide to modify its optical and electrical properties; however, the doping effect strongly depends on the types of defects introduced. Herein, we report a comparative study of nitrogen-doping-induced defects in Cu2O. Even in the lightly doped samples, a considerable number of nitrogen interstitials (Ni) formed, accompanied by nitrogen substitutions (NO) and oxygen vacancies (VO). In the course of high-temperature annealing, these Ni atoms interacted with VO, resulting in an increase in NO and decreases in Ni and VO. The properties of the annealed sample were significantly modified as a result. Our results suggest that Ni is a significant defect type in nitrogen-doped Cu2O.
authors.affiliation: Key Laboratory for Renewable Energy, National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesP.O. Box 603, Beijing 100190, China.
authors.forename: Junqiang
authors.initials: J
authors.lastname: Li
authors.affiliation: Key Laboratory for Renewable Energy, National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesP.O. Box 603, Beijing 100190, China.
authors.forename: Zengxia
authors.initials: Z
authors.lastname: Mei
authors.affiliation: Key Laboratory for Renewable Energy, National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesP.O. Box 603, Beijing 100190, China.
authors.forename: Lishu
authors.initials: L
authors.lastname: Liu
authors.affiliation: Key Laboratory for Renewable Energy, National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesP.O. Box 603, Beijing 100190, China.
authors.forename: Huili
authors.initials: H
authors.lastname: Liang
authors.affiliation: Department of Physics, University of Oslo, P.O. Box 1048 Blindern, NO-0316 Oslo, Norway.
authors.forename: Alexander
authors.initials: A
authors.lastname: Azarov
authors.affiliation: Department of Physics, University of Oslo, P.O. Box 1048 Blindern, NO-0316 Oslo, Norway.
authors.forename: Andrej
authors.initials: A
authors.lastname: Kuznetsov
authors.affiliation: Key Laboratory for Renewable Energy, National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesP.O. Box 603, Beijing 100190, China.
authors.forename: Yaoping
authors.initials: Y
authors.lastname: Liu
authors.affiliation: State Key Laboratory for Surface Physics, National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesP.O. Box 603, Beijing 100190, China.
authors.forename: Ailing
authors.initials: A
authors.lastname: Ji
authors.affiliation: Key Laboratory for Renewable Energy, National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesP.O. Box 603, Beijing 100190, China.
authors.forename: Qingbo
authors.initials: Q
authors.lastname: Meng
authors.affiliation: Key Laboratory for Renewable Energy, National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesP.O. Box 603, Beijing 100190, China.
authors.forename: Xiaolong
authors.initials: X
authors.lastname: Du