Development of greener methodology for the synthesis of CdSe quantum dots and characterization of their thin films

Baruah, Jejiron Maheswari; Narayan, Jyoti

doi:10.1007/s12596-017-0417-y

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…To tackle this difficulty, the concept of large stock shift quantum dots has come up. This large stock shift materials can absorb the sun light in short wavelength and emit the same in the long wavelength, which make these functionalized quantum dots more efficient toward these kind of applications [55].…”

Section: Quantum Dotsmentioning

confidence: 99%

Dilute Magnetic Semiconducting Quantum Dots: Smart Materials for Spintronics

Baruah¹,

Narayan²

2018

Nonmagnetic and Magnetic Quantum Dots

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The present day world involved in the fabrication of miniaturized smart devices is in continuous quest of materials with better optoelectronic and magneto-electronic efficiency. Effective incorporation of dopants into semiconductor lattices have been accepted as a primary means of controlling electrical, optical, magnetic and other physico-chemical properties of semiconductors. Manipulations in magnetic spin within a semiconducting material have lead to an effective research for potential ferromagnets with semiconducting properties, leading to an important field, dilute magnetic semiconductors (DMS). On the other hand, quantum dots (QDs) have been registered to be quantum confined nanocrystals with unique optoelectronic properties, having a wide range of potential applications. QDs experienced rapid development leading to the concept of dilute magnetic semiconducting quantum dots (DMSQDs), where transition metals with a few to several atomic percentages, having unpaired d-electrons, are doped in order to manipulate their opto-magnetic properties. These materials are fabricated by alloying transition metals with Group II-VI, III-V and IV-IV elements resulting in multi-component systems. They have tremendous applications in the spintronics industry, where electronic properties are controlled by spin degree of freedom. The present report reveals the significance, electronic origination of the fact, synthesis and their applications toward the fabrication of spintronics devices.

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Section: Quantum Dotsmentioning

confidence: 99%

Dilute Magnetic Semiconducting Quantum Dots: Smart Materials for Spintronics

Baruah¹,

Narayan²

2018

Nonmagnetic and Magnetic Quantum Dots

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“…For these reasons, 2D material‐based QDs have demonstrated exceptional properties and are used in a wide range of applications such as in solar cells, photodetectors, supercapacitors, telecommunications, optical sensors, and laser systems. [ 5–7 ] In comparison to 2D nanosheets, 2D QDs have higher solubility, doping ease, better photochemical stability, and demonstrate nonlinear optical effects. [ 8 ] Such advantageous phenomena of 2D QDs have already been demonstrated by Long et al., wherein WS 2 QDs exhibited superior nonlinear optical absorption (NOA) properties compared with those of nanosheets.…”

Section: Introductionmentioning

confidence: 99%

Tin Telluride Quantum Dots as a Novel Saturable Absorber for Q‐Switching and Mode Locking in Fiber Lasers

Ahmed

Qiao

Cheng

et al. 2020

Advanced Optical Materials

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Tin telluride (SnTe) quantum dots (QDs) have attracted considerable interest in the optoelectronic field owing to their favorable properties over conventional QDs, such as a relatively large Bohr radius (95 nm) and low toxicity level. However, till date, the nonlinear optical properties and ultrafast photonics applications of SnTe QDs have remained unexplored. In this study, SnTe QDs with an average diameter of 74 nm (smaller than the Bohr radius of SnTe) are fabricated via a liquid‐phase exfoliation method. Consequently, the nonlinear saturable absorption properties of such SnTe QDs are explored by realizing a modulation depth of 2.2% and saturable intensity of 1.67 GW cm−2. The prepared QDs are then used as saturable absorber (SA) in the erbium‐doped fiber laser ring cavity system. Moreover, Q‐switched and mode‐locked laser pulses with a pulse width of 1.81 µs and 691 fs are generated, respectively. Harmonic mode‐locking with a high repetition rate of 62.1 MHz (fifth order) is experimentally realized. This is the first demonstration, to the authors’ knowledge, of using SnTe QDs‐SA for generating ultrafast laser pulses along with high‐repetition‐rate harmonic mode‐locking pulses. Therefore, this study will establish a new research scope for SnTe QDs in ultrafast photonics, nonlinear photonics, frequency combs, and optical communications.

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“…Interestingly, in a solution, the particle size of QDs of a particular material is never homogeneous, i.e., the size of each dot cannot be exactly the same. Therefore, when absorption spectrum of QDs in a solution is recorded, due to the merging of peaks for each and every particle (responsible for individual electronic transition of individual particle), the absorption maximum is always broad, sometime edge only [21]. That is why, these QDs can cover a wide range of light spectrum to excite its electrons as per the requirement of energy.…”

Section: Semiconductors: Introduction and Utilitymentioning

confidence: 99%

Aqueous-Mediated Synthesis of Group IIB-VIA Semiconductor Quantum Dots: Challenges and Developments

Baruah¹,

Narayan²

2020

Solar Cells

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Quantum dots (QDs) of group IIB-VIA are one of the most promising materials for various advanced technological applications in the field of optoelectronics, photovoltaic solar cells and biomedicine. Recent developments have suggested the incorporation of aqueous-mediated synthesis for the QDs, as it is greener, environment friendly, cost-effective and reproducible. However, the process involves several challenges, which ought to be met in order to produce stable, consistent and sustainable product formation. The present review discusses the significance of semiconducting QDs, their synthesis through various processes, their pros and cons, and above all the advantage of aqueous-mediated, atom economic and energy-saving methodologies.

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Development of greener methodology for the synthesis of CdSe quantum dots and characterization of their thin films

Cited by 4 publications

References 13 publications

Dilute Magnetic Semiconducting Quantum Dots: Smart Materials for Spintronics

Dilute Magnetic Semiconducting Quantum Dots: Smart Materials for Spintronics

Tin Telluride Quantum Dots as a Novel Saturable Absorber for Q‐Switching and Mode Locking in Fiber Lasers

Aqueous-Mediated Synthesis of Group IIB-VIA Semiconductor Quantum Dots: Challenges and Developments

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