Luminescence of polymorphous SiO2

A. N. Trukhin; K. Smits; J. Jansons; A. Kuzmin

doi:10.1016/j.radmeas.2015.12.002

Luminescence of polymorphous SiO2

A. N. Trukhin^*
, K. Smits
, J. Jansons
, A. Kuzmin

^*Šī darba korespondējošais autors

Zinātniskās darbības rezultāts: Devums žurnālam › Zinātniskais raksts (žurnālā) › koleģiāli recenzēts

15 Atsauces (Scopus)

Kopsavilkums

The luminescence of self-trapped exciton (STE) was found and systematically studied in tetrahedron structured silica crystals (α-quartz, coesite, cristobalite) and glass. In octahedron structured stishovite only host material defect luminescence was observed. It strongly resembles luminescence of oxygen deficient silica glass and γ or neutron irradiated α-quartz. The energetic yield of STE luminescence for α-quartz and coesite is about 20% of absorbed energy and about 5(7)% for cristobalite. Two types of STE were found in α-quartz. Two overlapping bands of STEs are located at 2.5–2.7 eV. The model of STE is proposed as Si–O bond rupture, relaxation of created non-bridging oxygen (NBO) with foundation of a bond with bridging oxygen (BO) on opposite side of c or x,y channel. The strength of this bond is responsible for thermal stability of STE. Similar model of STE was ascribed for coesite and cristobalite with difference related to different structure. STE of Silica glass is strongly affected by disordered structure.

Oriģinālvaloda	Angļu
Lapas (no-līdz)	6-13
Lapu skaits	8
Žurnāls	Radiation Measurements
Sējums	90
DOIs	https://doi.org/10.1016/j.radmeas.2015.12.002
Publikācijas statuss	Publicēts - jūl. 2016

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@article{1b986ee4ca8b4c42b5d9f9cb79985ec1,

title = "Luminescence of polymorphous SiO2",

abstract = "The luminescence of self-trapped exciton (STE) was found and systematically studied in tetrahedron structured silica crystals (α-quartz, coesite, cristobalite) and glass. In octahedron structured stishovite only host material defect luminescence was observed. It strongly resembles luminescence of oxygen deficient silica glass and γ or neutron irradiated α-quartz. The energetic yield of STE luminescence for α-quartz and coesite is about 20\% of absorbed energy and about 5(7)\% for cristobalite. Two types of STE were found in α-quartz. Two overlapping bands of STEs are located at 2.5–2.7 eV. The model of STE is proposed as Si–O bond rupture, relaxation of created non-bridging oxygen (NBO) with foundation of a bond with bridging oxygen (BO) on opposite side of c or x,y channel. The strength of this bond is responsible for thermal stability of STE. Similar model of STE was ascribed for coesite and cristobalite with difference related to different structure. STE of Silica glass is strongly affected by disordered structure.",

keywords = "Electronic structure, Luminescence, Optical materials, Oxides, Raman spectroscopy",

author = "Trukhin, \{A. N.\} and K. Smits and J. Jansons and A. Kuzmin",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd",

year = "2016",

month = jul,

doi = "10.1016/j.radmeas.2015.12.002",

language = "English",

volume = "90",

pages = "6--13",

journal = "Radiation Measurements",

issn = "1350-4487",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Luminescence of polymorphous SiO2

AU - Trukhin, A. N.

AU - Smits, K.

AU - Jansons, J.

AU - Kuzmin, A.

PY - 2016/7

Y1 - 2016/7

N2 - The luminescence of self-trapped exciton (STE) was found and systematically studied in tetrahedron structured silica crystals (α-quartz, coesite, cristobalite) and glass. In octahedron structured stishovite only host material defect luminescence was observed. It strongly resembles luminescence of oxygen deficient silica glass and γ or neutron irradiated α-quartz. The energetic yield of STE luminescence for α-quartz and coesite is about 20% of absorbed energy and about 5(7)% for cristobalite. Two types of STE were found in α-quartz. Two overlapping bands of STEs are located at 2.5–2.7 eV. The model of STE is proposed as Si–O bond rupture, relaxation of created non-bridging oxygen (NBO) with foundation of a bond with bridging oxygen (BO) on opposite side of c or x,y channel. The strength of this bond is responsible for thermal stability of STE. Similar model of STE was ascribed for coesite and cristobalite with difference related to different structure. STE of Silica glass is strongly affected by disordered structure.

AB - The luminescence of self-trapped exciton (STE) was found and systematically studied in tetrahedron structured silica crystals (α-quartz, coesite, cristobalite) and glass. In octahedron structured stishovite only host material defect luminescence was observed. It strongly resembles luminescence of oxygen deficient silica glass and γ or neutron irradiated α-quartz. The energetic yield of STE luminescence for α-quartz and coesite is about 20% of absorbed energy and about 5(7)% for cristobalite. Two types of STE were found in α-quartz. Two overlapping bands of STEs are located at 2.5–2.7 eV. The model of STE is proposed as Si–O bond rupture, relaxation of created non-bridging oxygen (NBO) with foundation of a bond with bridging oxygen (BO) on opposite side of c or x,y channel. The strength of this bond is responsible for thermal stability of STE. Similar model of STE was ascribed for coesite and cristobalite with difference related to different structure. STE of Silica glass is strongly affected by disordered structure.

KW - Electronic structure

KW - Luminescence

KW - Optical materials

KW - Oxides

KW - Raman spectroscopy

UR - https://www.scopus.com/pages/publications/84951801738

U2 - 10.1016/j.radmeas.2015.12.002

DO - 10.1016/j.radmeas.2015.12.002

M3 - Article

AN - SCOPUS:84951801738

SN - 1350-4487

VL - 90

SP - 6

EP - 13

JO - Radiation Measurements

JF - Radiation Measurements

ER -

Luminescence of polymorphous SiO2

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