Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/12198
ชื่อเรื่อง: Singlet oxygen generation by nanoporous silicon: Photoluminescence dynamics in magnetic field
ผู้แต่ง: Aliev G.N.
Amonkosolpan J.
Wolverson D.
Keywords: Energy transfer
Magnetic fields
Oxygen
Photoluminescence
Porous silicon
Quenching
Silicon compounds
Cryogenic temperatures
Exchange mechanism
Nano-porous silicon
Oxygen concentrations
photosensitizing
Rate-equation models
Singlet oxygen
Singlet oxygen generation
Gas generators
วันที่เผยแพร่: 2020
บทคัดย่อ: Singlet oxygen generation in porous silicon (PSi) was investigated by a magneto-optical experiment. Photoluminescence (PL) quenching due to an energy transfer (ET) process mediated by an exchange interaction was monitored in the spectral range 1.4-2.5 eV and in a magnetic field of 0-6 Tesla at different levels of oxygen concentration and excitation pump power. When a magnetic field was applied, both PL recovery and, for magnetic fields below 2 Tesla and high concentrations of oxygen, an unusual additional pump power dependent quenching of the PL was observed. A rate equation model describing the behavior of PL from PSi with oxygen adsorbed at cryogenic temperatures in magnetic field was developed. The model has been expanded to cover the ET process as a function of the nanoparticle size. © 2019 IOP Publishing Ltd.
URI: https://ir.swu.ac.th/jspui/handle/123456789/12198
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85073646926&doi=10.1088%2f1361-6528%2fab4442&partnerID=40&md5=cb078c68a7dfe9c9227a1c2222d797c0
ISSN: 9574484
Appears in Collections:Scopus 1983-2021

Files in This Item:
There are no files associated with this item.


Items in SWU repository are protected by copyright, with all rights reserved, unless otherwise indicated.