Mid-infrared luminescence from Sn-modified PbSe quantum dots in silicate glasses

Zhang, Jihong; Liu, Chao; Heo, Jong

doi:10.1016/j.jnoncrysol.2015.04.010

Cited by 27 publications

(8 citation statements)

References 32 publications

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“…Glasses with nominal compositions (in mol%) of 50SiO 2 ‐25Na 2 O‐10BaO‐5Al 2 O 3 ‐8.2ZnO‐1.2ZnSe‐0.6PbO (abbreviated as PE glass, hereafter) and 50SiO 2 ‐25Na 2 O‐10BaO‐5Al 2 O 3 ‐8.1ZnO‐1.2ZnSe‐0.6PbO‐0.1SnO (PTE glass) were prepared using the conventional melt‐quenching method . Glasses were heat‐treated at 510, 520, 530, 540, and 550°C for 10 h to precipitate QDs.…”

Section: Sn‐doped Pbse Qds Formation In Glassesmentioning

confidence: 99%

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Band Gap and Diameter Modulation of Quantum Dots in Glasses

Liu

Heo

2015

Int J of Appl Glass Sci

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Modulation of the band gap energy and diameter of quantum dots (QDs) formed in glasses is important to achieve the optimized performance for applications as infrared light sources, lasers, saturable absorbers, etc. Absorption and photoluminescence of PbS QDs were extended into mid-infrared wavelength range in glasses containing small amount of lead but oversaturated with sulfur. Dual-band photoluminescence of PbSe QDs was prepared in oxyfluoride glass-ceramics containing BaF 2 nanocrystals. By introducing SnO in the glasses, alloyed Pb 1-x Sn x Se QDs with smaller band gap energies were formed in glasses, and mid-infrared photoluminescence of Pb 1-x Sn x Se QDs at~2570 nm in wavelength was achieved. *jheo@postech.ac.kr * Simulation of absorption spectra with multiple Gaussian functions was only used as reference. For glasses showing dual-band photoluminescence, the first low-energy absorption peaks were simulated with two Gaussian functions. For samples 5-7, the absorption spectra were simulated with five Gaussian functions, two for the 1S e -1S h (first low-energy absorption peak), one for 1S e, h -1S h, e (second low-energy absorption peak), one for 1P e -1P h (third low-energy absorption peak), and one for background. † Average diameters of PbSe QDs were calculated based on the absorption peak wavelength using the empirical equation. 30 Error bar was estimated from the width of the absorption peaks.

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Section: Sn‐doped Pbse Qds Formation In Glassesmentioning

confidence: 99%

“…Photoluminescence spectra of (a) PE glasses and (b) PTE glasses heat‐treated at temperatures indicated in the figure …”

Section: Sn‐doped Pbse Qds Formation In Glassesmentioning

confidence: 99%

Band Gap and Diameter Modulation of Quantum Dots in Glasses

Liu

Heo

2015

Int J of Appl Glass Sci

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“…For applications, quantum dots should be incorporated into some robust hosts, such as glasses. Until present, II–VI and IV–VI quantum dots such as ZnS, ZnSe, CdS, CdSe, PbS, PbSe, etc., have been prepared in glasses, tunable absorption and photoluminescence in the visible and near‐infrared spectral range has been achieved . It has also been found that precipitation of quantum dots into the glasses can prevent the agglomeration of quantum dots, and maintain the thermal stability of quantum dots as most of the quantum dots were precipitated inside the glass matrices upon thermal treatment at temperatures ranging from 400°C to 600°C …”

Section: Introductionmentioning

confidence: 99%

“…Until present, II-VI and IV-VI quantum dots such as ZnS, ZnSe, CdS, CdSe, PbS, PbSe, etc., have been prepared in glasses, tunable absorption and photoluminescence in the visible and nearinfrared spectral range has been achieved. [7][8][9][10][11] It has also been found that precipitation of quantum dots into the glasses can prevent the agglomeration of quantum dots, and maintain the thermal stability of quantum dots as most of the quantum dots were precipitated inside the glass matrices upon thermal treatment at temperatures ranging from 400°C to 600°C. [7][8][9][10][11] In this work, CsPbBr 3 QDs with tunable visible emission were precipitated in phosphate glasses through conventional melt-quenching and heat-treatment method.…”

Section: Introductionmentioning

confidence: 99%

Precipitation and Optical Properties of CsPbBr₃ Quantum Dots in Phosphate Glasses

et al. 2016

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CsPbBr3 quantum dots were precipitated in phosphate glasses through heat treatment. Controlled formation of CsPbBr3 quantum dots was realized by adjustment of heat‐treatment conditions. Absorption and photoluminescence spectra of CsPbBr3 quantum dots were tuned from 432 to 521 nm. Upon ultraviolet or blue light excitation, efficient photoluminescence from these CsPbBr3 quantum dots doped phosphate glasses was observed.

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“…At present, composition‐dependent band gap of PbSe QDs in glasses were reported. The ternary Pb 1–x Sn x Se QDs have been synthesized in silicate glass, and Sn can significantly reduce the band gap of PbSe QDs so that their PL is red‐shifted . In our previous work, ternary Pb 1− x Sr x Se QDs were precipitated from silicate glasses containing 10 mol% SrO, which have larger band gap than PbSe …”

Section: Introductionmentioning

confidence: 99%

Photodarkening and anti‐Stokes photoluminescence from PbSe and Sr²⁺‐doped PbSe quantum dots in silicate glasses

et al. 2018

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Photoluminescence (PL) properties of PbSe and Sr2+‐doped PbSe quantum dots (QDs) doped in silicate glasses were investigated by changing the excited laser wavelength and intensity. When BaO was replaced by SrO, the Sr2+‐doped PbSe QDs formed and showed large blue‐shifts in both absorption and PL bands compared to the PbSe QDs. It is attributed to the increasing in band gap resulted by the incorporation of Sr2+ ions into PbSe QDs. These two kinds of QDs were excited by the laser with the wavelengths of 1319 and 1532 nm. When rising the pumping intensity up to 1000 mW, the PL intensity from Sr2+‐doped PbSe QDs monotonically increased, while, the PL intensity from PbSe QDs reached maximum at pumping intensity at ~200 mW (λex = 1319 nm) and ~300 mW (λex = 1532 nm). The good resistance to photodarkening of Sr2+‐doped PbSe QDs is indicated passivation effect on the surface defects from Sr2+ ions doping. For Sr2+‐doped PbSe QDs the anti‐Stokes photoluminescence (ASPL) were observed when using both 1319 and 1532 nm excitation. The integrated intensity of the ASPL is linear with the excitation intensity, which indicates that the ASPL belongs to the phonon‐assisted one‐photon process. And the ASPL intensity as a function of excitation intensity shows a size dependence of the QDs.

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Mid-infrared luminescence from Sn-modified PbSe quantum dots in silicate glasses

Cited by 27 publications

References 32 publications

Band Gap and Diameter Modulation of Quantum Dots in Glasses

Band Gap and Diameter Modulation of Quantum Dots in Glasses

Precipitation and Optical Properties of CsPbBr₃ Quantum Dots in Phosphate Glasses

Photodarkening and anti‐Stokes photoluminescence from PbSe and Sr²⁺‐doped PbSe quantum dots in silicate glasses

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Mid-infrared luminescence from Sn-modified PbSe quantum dots in silicate glasses

Cited by 27 publications

References 32 publications

Band Gap and Diameter Modulation of Quantum Dots in Glasses

Band Gap and Diameter Modulation of Quantum Dots in Glasses

Precipitation and Optical Properties of CsPbBr3 Quantum Dots in Phosphate Glasses

Photodarkening and anti‐Stokes photoluminescence from PbSe and Sr2+‐doped PbSe quantum dots in silicate glasses

Contact Info

Product

Resources

About

Precipitation and Optical Properties of CsPbBr₃ Quantum Dots in Phosphate Glasses

Photodarkening and anti‐Stokes photoluminescence from PbSe and Sr²⁺‐doped PbSe quantum dots in silicate glasses