
Band Gap value
Closed  Responses: 0
For the default simple quantum dot, the bulk band gap is given as 1.43 eV (GaAs), and the value of Eg for the quantum dot is given as 0.18 eV. This is also the energy of the absorption...
https://nanohub.org/answers/question/1931

Where did spheroidal geometry go?
Closed  Responses: 2
In the introductory material, a spheroid is one of the options for geometry. It appears that this is not longer an option in the current version, is there a reason for that?
https://nanohub.org/answers/question/1828

recommended viewer for vtk files
Closed  Responses: 2
Hi, I want to analyse simulated quantum dot wave functions offline using a windows pc. For this, I have downloaded the wave function as a vtk file. Is there a recommeded viewer / tool for this...
https://nanohub.org/answers/question/1777

recommended viewer for vtk files
Closed  Responses: 0
Hi, I want to analyse simulated quantum dot wave functions offline using a windows pc. For this, I have downloaded the wave function as a vtk file. Is there a recommeded viewer / tool for this...
https://nanohub.org/answers/question/1776

Confusion with bandgap
Closed  Responses: 0
The default case shows a bandgap between the ground and the first excited states (less than 1 eV for GaAs!). This is confusing, since by bandgap students usually understand the difference...
https://nanohub.org/answers/question/1682

model of a truncated pyramid QD
Closed  Responses: 2
I am trying to simulate an InAs/GaAs QD for band structure. The model of a truncated pyramid is more reality in present researches. Do you have any intention to update the simulator for this...
https://nanohub.org/answers/question/1660

distinction between hole and electron states is not clear
Closed  Responses: 2
I ran a 2 band model in a dome structure with a wetting layer and it appears that I got 8 valence band states but it was NOT clear. How can I just ask for conduction band states? ...
https://nanohub.org/answers/question/1482

increments on absorption graph
Closed  Responses: 1
Is it possible to change the eV increments of the absorption coefficent data in the output so that if you’re comparing three or four different quantum dots, you can easily graph them on...
https://nanohub.org/answers/question/1315

Symmetry of pstates changes with the resolution of the mesh
Closed  Responses: 1
I am running a pyramidal standard structure (no change from defaults, just chose pyramidal shape). In the simulation result the 2 ptype orbitals are aligned with the diagonal of the pyramid. ...
https://nanohub.org/answers/question/1238

How can I get the total absorption/absorbance of the whole surface of a quantum dot in a QD solar cell by varying the angles theta and phi?
Closed  Responses: 1
Hi there,
I was doing a research on Quantum Dot in Solar Cell and I thought your software could be very useful for my work. I was intending to vary the size and shape of quantum dots and...
https://nanohub.org/answers/question/1123

How can I get the total absorption/absorbance of the whole surface of a quantum dot in a QD solar cell by varying the angles theta and phi?
Closed  Responses: 0
Hi there,
I was doing a research on Quantum Dot in Solar Cell and I thought your software could be very useful for my work. I was intending to vary the size and shape of quantum dots and...
https://nanohub.org/answers/question/1122

Can I calculate the energies for 2 coupled dots across a thin barrier?
Closed  Responses: 1
https://nanohub.org/answers/question/888

anisotropic effective masses
Closed  Responses: 1
I want to simulate Bismuth which has anisotropic effective masses… how can I input that?
https://nanohub.org/answers/question/877

How i can determine input for the e dimension for pyramidical or spheroid qdot? what should be the value of Lx,Ly & Lz?
Open  Responses: 1
https://nanohub.org/answers/question/659

example results
Closed  Responses: 2
Doing the examples in learning module of Introduction of Quantum Dot Lab, I don’t get the same results for ground and excited states as well as the state vs eigenenergy values as they are...
https://nanohub.org/answers/question/595

I compared a free electron in a 10nm x 10nm x 10nm closed box with an analytical formula and got a very different result
Closed  Responses: 3
I expect to get 0.011eV for the ground state quantization energy.
The tool gives me 0.040eV.
Is it a problem in my interpretation of the results or the tool is wrong?
https://nanohub.org/answers/question/535

Number of Atoms
Open  Responses: 1
I was trying to relate the volume size and the number of atoms in the simulation. I picked a 2nmby2nmby2nm box, but when I checked the Output Log file, it only contains 64 atoms....
https://nanohub.org/answers/question/426

Temperature Adjustment
Open  Responses: 1
Thank you for providing this great tool.
I’m trying to simulate properties of QDs in different temperatures. I wasn’t sure where in the simulation, the ‘Ambient...
https://nanohub.org/answers/question/421

How to distinct the conducting band and valance band
Open  Responses: 1
I am glad to use this tool. I have calculated 7 bands accordingto the default configuration. However, i can not distinct the conducting band and valvance band. Furthermore, i want to know which...
https://nanohub.org/answers/question/417

Barrier material, energy scale
Open  Responses: 1
Dear Sirs,
Do you pretend to make a version of Quantum Dot Lab that enabe us to consider the barrier constitution? (no freestanding) As for example, self assembled https://nanohub.org/answers/question/369