Temperature shift of the optical gap in some PbO–ZnO–P2O5 glasses

Schwarz, Jiří; Tichá, H.; Tichý, L.

doi:10.1016/j.matlet.2006.05.002

Cited by 16 publications

(8 citation statements)

References 12 publications

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“…2, the obtained PL emission band around 1.77 eV (700 nm) does not change with the temperature, from 35 up to 300 K, showing a high thermal stability for this optical transition. Indeed, this result is in agreement with the previously reported papers that state that highly located defect states and the formation of nanocrystallized glass can be related to the fact that nanocomposites in glasses and deeper energy levels of the defects show a low temperature dependence of the optical transition energy [31][32][33], in contrast to the strong temperature dependence of the optical gap observed for glasses [34,35].…”

Section: Resultssupporting

confidence: 93%

Eu3+ photoluminescence enhancement due to thermal energy transfer in Eu2O3-doped SiO2–B2O3–PbO2 glasses system

Lourenço

Dantas

Serqueira

et al. 2011

Journal of Luminescence

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a b s t r a c tIn this work, Eu 3 + -doped lead borosilicate glasses (SiO 2 -B 2 O 3 -PbO 2 ) synthesized by fusion method had their optical properties investigated as a function of temperature. Atomic Force Microscopy images obtained for a glass matrix annealed at 350 and 500 1C show a precipitated crystalline phase with sizes 11 and 21 nm, respectively. Besides, as the temperature increases from 350 to 300 K a strong Eu 3 + photoluminescence (PL) enhancement takes place. This anomalous feature is attributed to the thermally activated carrier transfer process from nanocrystals and charged intrinsic defects states to Eu 3 + energy levels. In addition, the PL peaks in this temperature range were assigned to the Eu 3 + transitions 5 D 0 -7 F 2 , at 612 nm, 5 D 0 -7 F 1 , at 595 nm, and 5 D 0 -7 F 0 , at 585 nm. It was also observed that the 5 D 0 -7 F 3 and 5 D 0 -7 F 4 PL bands at 655 and 700 nm, respectively, show a continuous decrease in intensity as the temperature increases.

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Section: Resultssupporting

confidence: 93%

Eu3+ photoluminescence enhancement due to thermal energy transfer in Eu2O3-doped SiO2–B2O3–PbO2 glasses system

Lourenço

Dantas

Serqueira

et al. 2011

Journal of Luminescence

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“…1, spectral dependencies of (Khm) 1/2 for (PbO) 10 Table 2. Our optical band gap values are about 0.5 eV higher than those found in [10] and the values of c are comparable to c published for some other tellurite [25] and oxide glasses [26,27].…”

Section: Resultssupporting

confidence: 87%

Optical band gap and Raman spectra in some (Bi2O3)x(WO3)y(TeO2)100−x−y and (PbO)x(WO3)y(TeO2)100−x−y glasses

Ozdanova

Tichá

Tichý

2009

Journal of Non-Crystalline Solids

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“…The values of the temperature coefficient of the optical gap are in the region 6.5 eV/K < c · 10 4 < 7.6 eV/K, close to typical c values for various glasses, [25,26]. Based on analogy with the E g (T) data [25,26] we suppose that the extrapolated E g (0) values, see Fig 2, overestimate the true E g (0) value by about 0.08 eV. …”

Section: Discussionsupporting

confidence: 70%