Self-trapped holes and recombination luminescence in LiBaF3 crystals

I. Tale; M. Springis; U. Rogulis; V. Ogorodnik; P. Kulis; V. Tale; A. Veispals; H. J. Fitting

doi:10.1016/S1350-4487(01)00096-8

Self-trapped holes and recombination luminescence in LiBaF₃ crystals

I. Tale
, M. Springis
, U. Rogulis
, V. Ogorodnik
, P. Kulis
, V. Tale
, A. Veispals
, H. J. Fitting

University of Latvia
University of Rostock

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

15 Atsauces (Scopus)

Kopsavilkums

We investigated electron paramagnetic resonance (EPR) angular dependencies, recombination afterglow and thermostimulated luminescence of undoped LiBaF₃ crystals, X-irradiated at low temperatures. EPR parameters of the F₂^- molecule oriented along the [1 1 0] direction have been obtained. Based on the value of the g-shift Δg = g_⊥-g_II = 0.02, characteristic for the V_K-centres in similar perovskites, we propose that we indeed observed the V_K-centres, not the H-centres. X-irradiation below 170 K results in creation of a long-time temperature-independent afterglow due to the tunnelling recombination between close electron and hole centres. The F-type electron centres and the V_K as well as probably O^2- centres are proposed to be the tunnelling recombination partners, responsible for the 4.1 and 3.15 eV luminescence bands, respectively.

Oriģinālvaloda	Angļu
Lapas (no-līdz)	751-754
Lapu skaits	4
Žurnāls	Radiation Measurements
Sējums	33
Izdevuma numurs	5
DOIs	https://doi.org/10.1016/S1350-4487(01)00096-8
Publikācijas statuss	Publicēts - 2001

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title = "Self-trapped holes and recombination luminescence in LiBaF3 crystals",

abstract = "We investigated electron paramagnetic resonance (EPR) angular dependencies, recombination afterglow and thermostimulated luminescence of undoped LiBaF3 crystals, X-irradiated at low temperatures. EPR parameters of the F2- molecule oriented along the [1 1 0] direction have been obtained. Based on the value of the g-shift Δg = g⊥-gII = 0.02, characteristic for the VK-centres in similar perovskites, we propose that we indeed observed the VK-centres, not the H-centres. X-irradiation below 170 K results in creation of a long-time temperature-independent afterglow due to the tunnelling recombination between close electron and hole centres. The F-type electron centres and the VK as well as probably O2- centres are proposed to be the tunnelling recombination partners, responsible for the 4.1 and 3.15 eV luminescence bands, respectively.",

keywords = "EPR, LiBaF, Recombination luminescence, Self-trapped holes",

author = "I. Tale and M. Springis and U. Rogulis and V. Ogorodnik and P. Kulis and V. Tale and A. Veispals and Fitting, \{H. J.\}",

year = "2001",

doi = "10.1016/S1350-4487(01)00096-8",

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TY - JOUR

T1 - Self-trapped holes and recombination luminescence in LiBaF3 crystals

AU - Tale, I.

AU - Springis, M.

AU - Rogulis, U.

AU - Ogorodnik, V.

AU - Kulis, P.

AU - Tale, V.

AU - Veispals, A.

AU - Fitting, H. J.

PY - 2001

Y1 - 2001

N2 - We investigated electron paramagnetic resonance (EPR) angular dependencies, recombination afterglow and thermostimulated luminescence of undoped LiBaF3 crystals, X-irradiated at low temperatures. EPR parameters of the F2- molecule oriented along the [1 1 0] direction have been obtained. Based on the value of the g-shift Δg = g⊥-gII = 0.02, characteristic for the VK-centres in similar perovskites, we propose that we indeed observed the VK-centres, not the H-centres. X-irradiation below 170 K results in creation of a long-time temperature-independent afterglow due to the tunnelling recombination between close electron and hole centres. The F-type electron centres and the VK as well as probably O2- centres are proposed to be the tunnelling recombination partners, responsible for the 4.1 and 3.15 eV luminescence bands, respectively.

AB - We investigated electron paramagnetic resonance (EPR) angular dependencies, recombination afterglow and thermostimulated luminescence of undoped LiBaF3 crystals, X-irradiated at low temperatures. EPR parameters of the F2- molecule oriented along the [1 1 0] direction have been obtained. Based on the value of the g-shift Δg = g⊥-gII = 0.02, characteristic for the VK-centres in similar perovskites, we propose that we indeed observed the VK-centres, not the H-centres. X-irradiation below 170 K results in creation of a long-time temperature-independent afterglow due to the tunnelling recombination between close electron and hole centres. The F-type electron centres and the VK as well as probably O2- centres are proposed to be the tunnelling recombination partners, responsible for the 4.1 and 3.15 eV luminescence bands, respectively.

KW - EPR

KW - LiBaF

KW - Recombination luminescence

KW - Self-trapped holes

UR - https://www.scopus.com/pages/publications/0034742239

U2 - 10.1016/S1350-4487(01)00096-8

DO - 10.1016/S1350-4487(01)00096-8

M3 - Article

AN - SCOPUS:0034742239

SN - 1350-4487

VL - 33

SP - 751

EP - 754

JO - Radiation Measurements

JF - Radiation Measurements

IS - 5

ER -