
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

Several Questions detailed below.
Open  Responses: 1
I love this tool, but I have a few questions…
1. What do the shapes of the wavefunctions mean? Does the surface represent energy levels?
2. Where is the effective mass...
https://nanohub.org/answers/question/195

Assumptions used in the QDs simulattions
Open  Responses: 1
Dear author, thank you for providing us this useful software.
Do you mind to tell me the assumptions and some fixed parameters used in the simulations, for example, the background...
https://nanohub.org/answers/question/171

There are no default values listed for the different effective masses for the different materials
Open  Responses: 2
Some of the other nanoHUB tools list preset values of effective masses for different materials. quantum dot lab, just has an entry for effective masses, could it be made similar to what other...
https://nanohub.org/answers/question/160

nanowire absorption spectrum
Open  Responses: 2
can we simulate the optical properties of a nanowire?
https://nanohub.org/answers/question/108