Exciton states and optical absorption in core/shell/shell spherical quantum dot

Hayrapetyan, D. B.; Baghdasaryan, D.A.; Kazaryan, É. M.; Pokutnyi, Sergey I.; Sarkisyan, H. A.

doi:10.1016/j.chemphys.2018.03.025

Cited by 11 publications

(2 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As we mention above for the high temperatures the term in Roosbroeck-Shockley relation transforms into the Boltzmann like form and this term vanishes the peaks in the high-energy region. That is why the low energy peaks can be observed more clearly in the PL spectra than the high-energy peaks [38,39]. It is also obvious that the peaks corresponding to the diagonal transitions have higher intensity than the peaks corresponding to the non-diagonal transitions.…”

Section: Discussion Of Resultsmentioning

confidence: 97%

Optical Absorption and Photoluminescence in the Spherical InP/InSb/InP Core/ shell/ shell Nano Structure

2018

AMSE

View full text Add to dashboard Cite

The one particle states of charge carriers are considered in InP/InSb/InPcore/shell/shell spherical quantum nano structure at the regime of strong quantization. The results of numerical calculations for the values of the energy of charge carriers for different values of the thickness of the quantizing layer of InSb are presented. The calculations were performed with allowance for the Kaned is persion for electrons and light holes in the InSb layer. The dependence of the number and position of the energy levels of charge carriers in the quantizing layer of InSb on the width of the well (layer thickness) is shown. The dependence of the absorption coefficient and photoluminescence spectra on the energy of incident light of interband transitions have been investigated. The oscillator strengths and selection rules for these transitions have been obtained. The absorption has a strictly resonant character. By the orbital and azimuthal numbers only diagonal inter band transitions are possible. For the radial number, the transitions between the states with the same radial numbers have the highest intensity

show abstract

Section: Discussion Of Resultsmentioning

confidence: 97%

Optical Absorption and Photoluminescence in the Spherical InP/InSb/InP Core/ shell/ shell Nano Structure

2018

AMSE

View full text Add to dashboard Cite

show abstract

“…The formation of additional outer layers (shells) around the QDs with different materials can alter the effect of photoblinking, known as core/shell QDs [37][38][39]. As the crystalline shell has more energy bandgap tunability, the core energy level can be manipulated more [40]. The shell serves as a barrier to isolate the core from surrounding media to evade surface faults [1,31], prevent photodegradation of the core [33,39], make the QD more stable in order to maintain the continuous photolumination [8], and preserve the QDs' luminous properties [3].…”

Section: Introductionmentioning

confidence: 99%

Computational modelling of light-matter interaction in aSi with CdSe/ZnS core/shell quantum dots and metal nanoantenna for solar cell applications

et al. 2023

View full text Add to dashboard Cite

As the world population rises, energy needs are become critical. Using photovoltaic technologies like amorphous silicon solar cells (aSiSC) to harvest solar power might benefit global concern. Previous research claimed that aSiSCs were modest short-wavelength absorbers. Quantum dot (QD) may be applied to the aSiSC to enhance optical absorptions and electric fields as the QD’s bandgap is tunable, which can cover a broader electromagnetic range. This study aims are to design the 3D aSiSC with QD on the model and to investigate the optical absorption peak, electric field profiles, and light-matter interaction of the models via COMSOL Multiphysics software. From the base model, the optical absorption improved from 736 nm at 41.827% to 46.005% at 642 nm for the aSiQDSC model which developed with 0.5/3.0 nm radius of core/shell cadmium selenide/zinc sulphide (CdSe/ZnS). This study proceeded combining rectangular nanosheets gold and silver nanoantenna (Au and Ag NA) with various gap g of NA to the aSiQDSC models where g = 0.5 nm Ag NA model was presented the higher optical absorption of 47.246% at 650 nm, and electric fields of 2.53×1010 V/nm. Computationally, this ultimate design is ecologically sound for solar cell applications, which allow future direction in renewable energy research and fabrication

show abstract

Simulation on Optical Absorption for Amorphous Silicon Thin Film Solar Cell with CdSe/ZnS Quantum Dots

Rodhuan

Abdul-Kahar

Ameruddin

2022

Springer Proceedings in Physics

View full text Add to dashboard Cite

Exciton states and optical absorption in core/shell/shell spherical quantum dot

Cited by 11 publications

References 31 publications

Optical Absorption and Photoluminescence in the Spherical InP/InSb/InP Core/ shell/ shell Nano Structure

Optical Absorption and Photoluminescence in the Spherical InP/InSb/InP Core/ shell/ shell Nano Structure

Computational modelling of light-matter interaction in aSi with CdSe/ZnS core/shell quantum dots and metal nanoantenna for solar cell applications

Simulation on Optical Absorption for Amorphous Silicon Thin Film Solar Cell with CdSe/ZnS Quantum Dots

Contact Info

Product

Resources

About