title: Observation of the Long Afterglow in AlN Helices.
abstract: The coupling effect between nitrogen-vacancies (VN) and aluminum-interstitial sites (Ali) is investigated theoretically and experimentally in AlN helices. First-principles calculations predict a photoluminescence emission peak at approximately 600 nm in AlN doped with complex-defect (VNAli). A typical long afterglow (persistent luminescence) was observed in unintentionally doped AlN helices by introducing the complex-defect of (VNAli). An analysis of the luminescent characteristics indicated that the mechanism behind this afterglow is the complex-defect level and complex-defect density. These findings may further enrich the thoughts of defects in the wide band gap semiconductor of AlN.
authors.affiliation: Shenzhen Graduate School, Harbin Institute of Technology , Shenzhen 518055, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Jin
authors.affiliation: Shenzhen Graduate School, Harbin Institute of Technology , Shenzhen 518055, China.
authors.forename: Huayu
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Changchun University of Science and Technology , Changchun 130022, China.
authors.forename: Ruiqun
authors.initials: R
authors.lastname: Pan
authors.forename: Ping
authors.initials: P
authors.lastname: Xu
authors.forename: Jiecai
authors.initials: J
authors.lastname: Han
authors.forename: Xinghong
authors.initials: X
authors.lastname: Zhang
authors.forename: Quan
authors.initials: Q
authors.lastname: Yuan
authors.affiliation: Liaoning Key Materials Laboratory for Railway, School of Materials Science and Engineering, Dalian Jiaotong University , Dalian 116028, China.
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Zhang
authors.forename: Xianjie
authors.initials: X
authors.lastname: Wang
authors.forename: Yi
authors.initials: Y
authors.lastname: Wang
authors.forename: Bo
authors.initials: B
authors.lastname: Song
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D000535:Aluminum
keywords: AlN; complex-defect; helix; long afterglow