Binding Energy of Exciton in Quantum Dots with the Central-cell Correction Depending on the Dot Sizes

Thao, To Thi; Việt, Nguyễn Ái

doi:10.15625/0868-3166/14/2/10700

Cited by 5 publications

(4 citation statements)

References 9 publications

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“…Powerful and effective optical properties of QDs make them important in the area of Optoelectronics and Nano-Device Development. [2][3][4] The binding energy of the excitonic systems is larger in QDs than in bulk material and, large binding energy of the biexciton state is important that such systems could be useful for operating a two-qubit gate in quantum computing. 5,6 It is well known that excitonic systems have an important role to understand electronic and optical properties of QDs.…”

Section: Introductionmentioning

confidence: 99%

“…The electron-hole interactions in small semiconductor crystals and electronic states depending on QD size have been investigated by many researchers. 4,8,11 Electron systems under parabolic confinement are also attractive experimentally, dynamic and far infrared responses of these systems have been studied. 12 To study of excitonic systems in terms of the quantum effects of their size is important in low dimensional QDs rather than the bulk semiconductors.…”

Section: Introductionmentioning

confidence: 99%

“…11,16 The excitonic binding energy in a QD has been investigated via the variational method by converting the electron and hole coordinates to relative and center of mass coordinates and the ground state energy data depending on QD size has been published. 4 Generally, infinite barriers have been considered as a confinement potential of excitons 17 and exact numerical solution of this system has been calculated by Hu. 18 Parabolic potential profile is the basic model of this problem 19 and this potential is suitable approach for a few electron QDs (see Ref.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Exciton States in a Quantum Dot With Parabolic Confinement

Doğan

Şakiroğlu

Yıldız

et al. 2011

Int. J. Mod. Phys. B

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In this study the electronic eigenstructure of an exciton in a parabolic quantum dot (QD) has been calculated with a high accuracy by using Finite element method (FEM). We have converted the coordinates of electron-light-hole system to relative and center of mass coordinate, then placed the Spherical Harmonics into Schrödinger equation analytically and obtained the Schrödinger equation which depends only on the radial variable. Finally we used FEM with only radial variable in order to get the accurate numerical results. We also showed first 21 energy level spectra of exciton depending on confinement and Coulomb interaction parameters.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Exciton States in a Quantum Dot With Parabolic Confinement

Doğan

Şakiroğlu

Yıldız

et al. 2011

Int. J. Mod. Phys. B

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“…[5] So the increased interest has been focused on Coulomb states of few-particles where quantum mechanical effect can be strongly observed. [6] This is an attractive area not only for technological application in optoelectronic de-vices, such as quantum dot lasers, but also for the fundamental researches.…”

Section: Introductionmentioning

confidence: 99%

Ground state energy of excitons in quantum dot treated variationally via Hylleraas-like wavefunction

et al. 2009

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In this work, the effects of quantum confinement on the ground state energy of a correlated electron–hole pair in a spherical and in a disc-like quantum dot have been investigated as a function of quantum dot size. Under parabolic confinement potential and within effective mass approximation Ritz's variational method is applied to Hylleraas-like trial wavefunction. An efficient method for reducing the main effort of the calculation of terms like rehk exp(−λreh) is introduced. The main contribution of the present work is the introduction of integral transforms which provide the calculation of expectation value of energy and the related matrix elements to be done analytically over single-particle coordinates instead of Hylleraas coordinates.

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Quantum‐Dot Light‐Emitting Diodes

Sun

2021

Digital Encyclopedia of Applied Physics

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The article first introduces the application prospects of quantum‐dot light‐emitting diodes (QLEDs) in display market by showing some prototype products. Then, it presents the fundamentals and background of colloidal quantum dots (CQDs), the key materials in QLEDs. The concept of quantum confinement effect is introduced. Based on the understanding of quantum confinement effects, the article further explains the band structures of CQDs and their size‐dependent luminescent properties. The history of developing high‐quality CQDs and the core/shell structures of CQDs are also summarized. Then the fundamentals of QLEDs including the device structures and working mechanisms are introduced. The evolution of the device architectures of QLEDs is presented. The explanations on the working mechanisms and device physics are especially focused on how the charge transport layers affect the physical processes, such as charge injection, exciton quenching, and injection balance in QLEDs. The main loss mechanisms in QLEDs understood by the scientific community so far are elaborated, which include Auger recombination, Förster resonance energy transfer, and field‐induced quenching. Finally, the article is concluded with the summary of most urgent challenges in commercialization of QLED‐based display. Some other promising applications based on QLEDs are also mentioned.

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Binding Energy of Exciton in Quantum Dots with the Central-cell Correction Depending on the Dot Sizes

Cited by 5 publications

References 9 publications

Exciton States in a Quantum Dot With Parabolic Confinement

Exciton States in a Quantum Dot With Parabolic Confinement

Ground state energy of excitons in quantum dot treated variationally via Hylleraas-like wavefunction

Quantum‐Dot Light‐Emitting Diodes

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