Growth and micro‐luminescence from diluted magnetic quantum dots

Wojnar, P.; Karczewski, G.; Suffczyński, J.; Goryca, M.; Golnik, A.; Kowalik, K.; Kossut, J.

doi:10.1002/pssc.201001131

Cited by 6 publications

(5 citation statements)

References 17 publications

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“…only lanthanide-based materials, but also semiconductors [70,71] and organic compounds. [72] For lanthanide luminous ions doped in crystalline host matrices, the original energy level 2S+1 L J (L, S, and J represents the total orbital angular momentum, the total spin angular momentum, and the total angular momentum, respectively) is first removed by the degeneracy and split into several Stark levels by the crystal field, which breaks the parity selection rule and generates lanthanide luminescence.…”

Section: Controlling the Temperaturementioning

confidence: 99%

“…For instance, temperature change usually has a bit of time delay, complex temperature regulation together with control equipment are often required, and it may potentially alter the chemical and crystallographic features for certain materials. only lanthanide-based materials, but also semiconductors [70,71] and organic compounds. [72] For lanthanide luminous ions doped in crystalline host matrices, the original energy level 2S+1 L J (L, S, and J represents the total orbital angular momentum, the total spin angular momentum, and the total angular momentum, respectively) is first removed by the degeneracy and split into several Stark levels by the crystal field, which breaks the parity selection rule and generates lanthanide luminescence.…”

Section: Controlling the Temperaturementioning

confidence: 99%

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Physical Manipulation of Lanthanide‐Activated Photoluminescence

et al. 2019

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Versatile manipulation of lanthanide photoluminescence not only enables a more thorough understanding of the luminescent mechanism, but also promotes their widespread applications including advanced display and security, bioimaging and biotherapy, and sensors. The traditional chemical methods, engineering of composition, concentration, size, morphology, and surface defects, can easily tune the excitation, energy transfer and emission processes and have been frequently used. Despite the powerful ability to control luminescence intensity and selectivity, these chemical approaches suffer from cumbersome synthesis processes and are usually time consuming and irreversible. Recently, there have been numerous examples of physical approaches realizing in situ, real time, and reversible luminescence manipulation for certain materials under a given excitation. Herein, the existing physical strategies comprising temperature, magnetic field, electric field, and mechanical stress are summarized. For each approach, the action mechanism, material design, applications, as well as current challenges are discussed, and possible development directions and broadening of the potential application areas are considered. Applying Magnetic FieldMagneto-optic interaction, here mainly refers to the effect of applied magnetic field during luminescence measurement, was also widely utilized to regulate luminescence emission of not

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Section: Controlling the Temperaturementioning

confidence: 99%

Section: Controlling the Temperaturementioning

confidence: 99%

Physical Manipulation of Lanthanide‐Activated Photoluminescence

et al. 2019

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“…An interesting example is the luminescence of diluted magnetic QDs, which can be modulated by an external magnetic field. Magnetic QDs were fabricated by Wojnar and co‐workers, through introducing Mn ions into CdTe QDs. By increasing the magnetic field, the PL line from a single CdTe QD doped with 3.5% Mn shows a clear redshift and spectral narrowing (Figure c).…”

Section: Nanostructured Semiconductorsmentioning

confidence: 99%

Tuning the Luminescence of Phosphors: Beyond Conventional Chemical Method

Bai

Tsang

Hao

2014

Advanced Optical Materials

135

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thermoluminescence (TL), and so on. [ 2 ] Nowadays, a large number of phosphors have been synthesized and developed, each one having its own characteristic emission wavelength, bandwidth, and luminescence lifetime. Here, the lifetime normally means the time in which the emission intensity decays to 1/ e . Moreover, phosphors have been extensively utilized in many areas, both scientifi c research and practical applications. For instance, phosphor-converted fl uorescent lamps and white light-emitting devices (LEDs) have been used as light sources in a widespread range of daily life and industrial applications. [ 3 ] CL and EL phosphors have been applied to traditional or modern display devices presenting visual information. [ 4 ] In the past few decades, fl uorescent nanoparticles, such as quantum dots (QDs) [ 5 ] and lanthanide (Ln) ion-doped nanocrystals, [ 6 ] have attracted considerable attention and showed great promise in fl uorescent probes, biosensing, bioimaging, therapies, and optoelectronic devices. [ 7 ] The ability to tune the luminescence properties of phosphors is highly desired in the optical materials community. [ 8 ] For various applications such as solid-state lasers, bioimaging, optical sensing, and display devices, precise control over the luminescence properties is essential for optimizing the performance and processing of optical devices and systems. Tuning luminescence is also of great signifi cance for fundamental studies of the luminescence mechanisms of phosphors. In general, tuning luminescence in the visible region is popularly known as varying the emission colour and brightness obtained by the naked eye. Broadly speaking, tuning luminescence changes the emission intensity, wavelength, bandwidth, luminescence decay or lifetime, and polarization.Numerous studies have extensively focused on tuning the luminescence of phosphors by conventional chemical ways, typically changing chemical compositions, crystal structure, phase, nanocrystal size, surface groups, and so on. [ 9 ] Comparatively, there have been less results that show the tunable luminescence of phosphors through physical methods. So far, few attempts have been made to provide a comprehensive coverage of the strategies pertaining to this emerging research fi eld and a broad overview of research advances in diverse areas of application. In this review, chemically driven luminescence tuning is Tuning the luminescence of phosphors is extremely important in controlling and processing light for active components of light sources, optical sensing, display devices, and biomedicine. So far, conventional chemical approaches have routinely been employed to modify the luminescence during the phosphor's synthesis. It is interesting to broaden the modulation of luminescence by physical methods, such as electric fi eld, magnetic fi eld, mechanical stress, temperature, photons, ionizing radiation, and so on. Since some physical methods may provide unusual routes to tune the luminescence in in-situ, real-time, dynamical and reversible mann...

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“…Mn doping in the CdTe layer was tuned to slightly exceed the optimal value for nding singly-doped QDs [7,8].…”

Section: Samplesmentioning

confidence: 99%

The Novel Multichannel Single Photon Correlations Technique Applied for the Spin Dynamics Study of a Few Mn^{2+} Ions in a CdTe/ZnTe Quantum Dot

et al. 2013

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In this work we demonstrate a novel experimental approach to the study of single photon correlations. The introduction of the multichannel detection setup enables the simultaneous measurement of a large number of correlation functions for photons emitted from dierent energetic ranges. The advantages of this new approach were exploited in a detailed study of the biexcitonexciton recombination cascade in CdTe/ZnTe quantum dots doped with a few Mn 2+ ions. The information about the dynamics of the magnetic system in the quantum dot during the lifetime of the exciton was obtained from the analysis of the correlation functions.

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Growth and micro‐luminescence from diluted magnetic quantum dots

Cited by 6 publications

References 17 publications

Physical Manipulation of Lanthanide‐Activated Photoluminescence

Physical Manipulation of Lanthanide‐Activated Photoluminescence

Tuning the Luminescence of Phosphors: Beyond Conventional Chemical Method

The Novel Multichannel Single Photon Correlations Technique Applied for the Spin Dynamics Study of a Few Mn^{2+} Ions in a CdTe/ZnTe Quantum Dot

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