Optical properties of nanometre AgI-silica composite synthesized by a simple quenching method
Creators
- 1. Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China)
Description
Optical absorption and room temperature photoluminescence (PL) properties of nanometre AgI-silica composite synthesized by a simple heating-quenching method were investigated. The absorption of quenched AgI-silica was enhanced markedly. Three absorption bands at 440 (2.8 eV), 260 (4.8 eV) and 220 nm (5.6 eV) were observed. The excitonic absorption of AgI showed a red shift of ∼0.11 eV, in contrast to the usually observed blue shift in AgI nanocrystals. Besides two UV emissions from a non-bridging hole centre and E' centre defects formed in silica, the composite exhibited two PL emissions at 2.62 and 2.40 eV. The 2.62 eV PL was ascribed to donor-acceptor recombination of AgI, while the 2.40 eV one may correlate with energy levels induced by the interaction between silica and AgI. The role of silica in improving the PL for nanometre AgI is discussed
Availability note (English)
Available online at http://stacks.iop.org/0953-8984/15/4869/c32718.pdf or at the Web site for the Journal of Physics. Condensed Matter (ISSN 1361-648X) http://www.iop.org/Additional details
Identifiers
- URL
- http://stacks.iop.org/0953-8984/15/4869/c32718.pdf; http://www.iop.org/;
- DOI
- 10.1088/0953-8984/15/27/318;
- PII
- S0953-8984(03)62797-9;
Publishing Information
- Journal Title
- Journal of Physics. Condensed Matter
- Journal Volume
- 15
- Journal Issue
- 27
- Journal Page Range
- p. 4869-4876
- ISSN
- 0953-8984
- CODEN
- JCOMEL
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 35000489
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- ABSORPTION SPECTROSCOPY; E CENTERS; EMISSION SPECTRA; EXCITONS; NANOSTRUCTURES; OPACITY; PHOTOLUMINESCENCE; RECOMBINATION; SILICA; SILVER IODIDES
- Descriptors DEC
- COLOR CENTERS; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; EMISSION; HALIDES; HALOGEN COMPOUNDS; IODIDES; IODINE COMPOUNDS; LUMINESCENCE; MINERALS; OPTICAL PROPERTIES; OXIDE MINERALS; PHOTON EMISSION; PHYSICAL PROPERTIES; POINT DEFECTS; QUASI PARTICLES; SILVER COMPOUNDS; SPECTRA; SPECTROSCOPY; TRANSITION ELEMENT COMPOUNDS; VACANCIES