Quantum Dot-Doped Glasses and Fibers: Fabrication and Optical Properties

Dong, Guoping; Wang, Haipeng; Chen, Guanzhong; Pan, Qiwen; Qiu, Jianrong

doi:10.3389/fmats.2015.00013

Cited by 31 publications

(16 citation statements)

References 95 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Absorption and PL spectra (Figure B) of PbS QD‐doped glasses were measured. The average radii ( R ) of QDs in the glasses can be estimated by effective bandgap energy ( E g ( R )) of QDs calculated from absorption peak through the following equation:

{(E_{g} false(R false))}^{2} = {E_{g}}^{2} + (\frac{2 ħ^{2} E_{g}}{m^{*}}) {(\frac{π}{R})}^{2}

…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Energy transfer process and temperature‐dependent photoluminescence of PbS quantum dot‐doped glasses

et al. 2018

Self Cite

View full text Add to dashboard Cite

PbS quantum dot (QD)‐doped glasses were fabricated through melt‐quenching method. After heat treatment schedule, uniform QDs were precipitated in the glasses and near‐infrared emission covering 900‐1700 nm was obtained under excitation. From photoluminescence (PL) spectra and lifetime decay curves, the whole emission band of QD‐doped glasses consisted of emission from the 1S‐1S state and the trap state. While using excitation with higher energy, the full width at half maximum (FWHM) of QD‐doped glasses broadened because smaller QDs were excited. Energy transfer process among QDs was revealed by measuring the lifetime of different emission bands in PL spectrum and the energy transferred from smaller QDs with broader bandgap to bigger QDs with narrow bandgap. Temperature‐dependent PL and the corresponding lifetime decay curves of PbS QD‐doped glasses were analyzed. Temperature‐dependent bandgap structure of PbS QDs was obtained by using density functional theory (DFT) calculations. The results here give deep insight into optical properties of PbS QD‐doped glasses and it is beneficial to design and develop high‐performance QD‐based optoelectronic devices in theory.

show abstract

{(E_{g} false(R false))}^{2} = {E_{g}}^{2} + (\frac{2 ħ^{2} E_{g}}{m^{*}}) {(\frac{π}{R})}^{2}

…”

Section: Resultsmentioning

confidence: 99%

“…The PL FWHM of a single PbS QD is about 50 nm and that of PbS QD‐doped glasses is usually ranging from 100 to 300 nm. The sample heat treated at 590°C exhibited the smallest FWHM, only 105 nm, which can be assumed that the emission from the sample was mainly from a single size of QDs.…”

Section: Resultsmentioning

confidence: 99%

Energy transfer process and temperature‐dependent photoluminescence of PbS quantum dot‐doped glasses

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Moreover, because of the UV‐induced degradation of polymer matrices over time, they are unsuitable for use in solar concentrators, and because of difference in refractive indexes with glass, they cannot be used in optical fiber amplifiers. Utilizing glass instead of a polymer as a matrix is advantageous, because glass is more resistant than polymeric materials to environmental factors and can be easily formed into the desired shape, such as glass fibers . However, the manufacturing techniques used to embed QDs in a glass matrix involve annealing of precursor‐saturated glass that could take from 5 to even 30 h. In addition, QD precursors change the chemical composition of the glass and the amount of them that can be dissolved is limited .…”

Section: Introductionmentioning

confidence: 99%

“…Different types of nanoparticles can be mixed simultaneously with a glass matrix using a sol–gel method, but this approach can only be applied to silica glasses. Another disadvantage is that, due to high internal stresses, it is difficult to obtain large volumes of material and only thin‐film samples are attainable …”

Section: Introductionmentioning

confidence: 99%

Manufacturing of Volumetric Glass–Based Composites with Single‐ and Double‐QD Doping

Nowaczyński

Gajc

Surma

et al. 2018

Part & Part Syst Charact

View full text Add to dashboard Cite

Quantum dot (QD)‐based light‐emitting materials are gaining increased attention because of their easily tunable optical properties desired for various applications in biology, optoelectronics, and photonics. However, few methods can be used to manufacture volumetric materials doped with more than one type of QD other than QD‐polymer hybrids, and they often require complicated preparation processes and are prone to luminescence quenching by QD aggregation and separation from the matrix. Here, simultaneous doping of a volumetric glass‐based nanocomposite with two types of QDs is demonstrated for the first time in a single‐step process using the nanoparticle direct doping method. Glass rods doped with CdTe, CdSe/ZnS, or co‐doped with both QDs, are obtained. Photoluminescence and lifetime experiments confirm temperature‐dependent double emission with maxima at 596 and 720 nm with mean lifetimes up to 16 ns, as well as radiative energy transfer from the short wavelength–emitting QDs to the long wavelength–emitting QDs. This approach may enable the simple and cost‐efficient manufacturing of bulk materials that produce multicolor luminescence with cascade excitation pumping. Applications that could benefit from this include broadband optical fiber amplifiers, backlight systems in LCD screens, high‐power LEDs, or down‐converting solar concentrators used to increase the efficiency of solar panels.

show abstract

“…In addition to the RE ions, transition metals and noble metals, is there any other possible methods to tailor the MIR luminescence of RE‐doped glass? Over the past decade, the quantum dots (QDs) precipitated glass and optical fiber with NIR and MIR emissions have drawn increasing attention . Compared with RE ions, the QDs with narrow bandgaps were widely investigated for various optoelectronics fields.…”

Section: Introductionmentioning

confidence: 99%

Quantum‐dots‐precipitated rare‐earth‐doped glass for ultra‐broadband mid‐infrared emissions

et al. 2018

View full text Add to dashboard Cite

Mid‐infrared (MIR) fiber lasers have wide application prospects and great commercial value in the fields of medical operation, remote sensing and military weapon, etc. At present, Tm3+‐doped glass can obtain broadband luminescence at 2 μm, the introduction of Ho3+ or Er3+ ions also shows a tunable MIR emission but with limited success. Herein, the rare‐earth (RE) doped glass with quantum dots (QDs) precipitation is proposed for achieving ultra‐broadband MIR emissions. The types and sizes of QDs are determined by the XRD and TEM, and their optical properties are further characterized by the absorption and emission spectra as well as the lifetime decay curves. It is found that the diameter of the QDs is gradually increased from 1.7 to 5.1 nm by increasing the heat‐treated temperature from 490°C to 530°C, respectively. Interestingly, an ultra‐broadband emission covering 1400‐2600 nm is achieved from the heat‐treated glass upon the excitation of 808 nm laser diode as a result of an overlapped emission from Tm3+ and PbS. All results suggest that these QDs‐precipitated RE‐doped glasses have important application prospects in ultra‐broadband MIR laser glass, glass fiber, and fiber lasers.

show abstract

Quantum Dot-Doped Glasses and Fibers: Fabrication and Optical Properties

Cited by 31 publications

References 95 publications

Energy transfer process and temperature‐dependent photoluminescence of PbS quantum dot‐doped glasses

Energy transfer process and temperature‐dependent photoluminescence of PbS quantum dot‐doped glasses

Manufacturing of Volumetric Glass–Based Composites with Single‐ and Double‐QD Doping

Quantum‐dots‐precipitated rare‐earth‐doped glass for ultra‐broadband mid‐infrared emissions

Contact Info

Product

Resources

About