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Ion‐beam synthesis and thermal behaviour of luminescent Zn 2 SiO 4 nanoparticles in silica glasses and films
Author(s) -
Zatsepin Anatoly,
Buntov Evgeny,
Gavrilov Nikolai,
Fitting HansJoachim
Publication year - 2016
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201600663
Subject(s) - materials science , photoluminescence , amorphous solid , annealing (glass) , nanocomposite , nanocrystal , luminescence , nanoparticle , analytical chemistry (journal) , ion beam , silicon , ion , chemical engineering , nanotechnology , optoelectronics , composite material , crystallography , chemistry , chromatography , physics , quantum mechanics , engineering
In the present study, the temperature‐dependent photoluminescence (PL) spectra of Zn 2 SiO 4 nano‐crystalline phases formed in glassy and thin‐film SiO 2 matrices by means of ion implantation and annealing are studied. Pure willemite ceramics were used as a reference. The green and yellow light emission observed is associated with point defects inside α‐ and β‐Zn 2 SiO 4 nanoparticles. Different PL excitation mechanisms were distinguished for implanted silica. The electronic states of point defects are localised to dimensions much smaller than the nanocrystal size, so the PL band positions are similar to those of bulk material. Conversely, the vibrational states are extended and therefore subjected to the effects of confinement, surface defects and disorder of the host matrix. Hence, the PL intensity quenching (different laws for α‐phase and β‐phase) and line broadening shed light to the PL emission mechanism and reveal the influence of the amorphous silica matrix. The results obtained may be used to tailor the optical properties of the nanocomposite over a wide temperature range.