Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2009-02-01

Journal: APPLIED SURFACE SCIENCE

Included Journals: Scopus、EI、SCIE

Volume: 255

Issue: 8

Page Number: 4430-4433

ISSN: 0169-4332

Key Words: ZnO; Nanoneedle arrays; Photoluminescence; Phosphorus-doped

Abstract: Phosphorus-doped ZnO nanoneedle arrays were prepared by phosphorus diffusion from InP substrate using a pulsed laser deposition (PLD) technique. The optical properties of ZnO nanoneedle were investigated by photoluminescence (PL) spectroscopy. Low-temperature photoluminescence spectrum measurements exhibited five acceptor-related emission peaks. The excitation intensity and temperature dependent photoluminescence spectra confirmed that the emission peaks corresponded to neutral-acceptor bound exciton, free electron to acceptor, donor-acceptor pairs, and their first and second photon replicas transitions. Acceptor-binding energy was determined to be 135-167 meV, which agrees well with the best-fitting result of the temperature dependent photoluminescence measurements and is reasonable in terms of theoretic prediction in ZnO. (C) 2008 Elsevier B. V. All rights reserved.