Messages

1

General Questions and Answers / Re: is there a way to simulate a cluster of quantum dots?

« on: October 7, 2016, 07:44 »

I had put 15 as a random number. 
Actually, I want to obtain the bandgap (HOMO-LUMO gap) variation with respect to the number of atoms. So, I need to vary the number of atoms in a definite proportion so that appropriate graph is obtained.

2

General Questions and Answers / Re: is there a way to simulate a cluster of quantum dots?

« on: October 6, 2016, 20:31 »

I want to vary the number of atoms by certain number (e.g. increase 2 atoms). In Wulff construction, number increases with radius. There is no such control on number of atoms.

Let say I want to create a structure with 15 atoms. How will I do it?

3

General Questions and Answers / Re: is there a way to simulate a cluster of quantum dots?

« on: October 6, 2016, 18:30 »

Sir,
The Wulff construction tool does not provide an option to increase the atoms in  a discrete manner. I noticed that number of atoms in a cluster is dependent on the radius of the cluster. Is there any way I can set up the number of atoms as my wish in a cluster.

4

General Questions and Answers / Re: is there a way to simulate a cluster of quantum dots?

« on: September 30, 2016, 19:24 »

Sir,
I tried the Wulff construction tool for analyzing the variation in bandgap. Unfortunately, after having Wulff cluster the bandstructure option in analysis does not show up. So, how can I find bandgap after having Wulff cluster.

5

General Questions and Answers / Re: is there a way to simulate a cluster of quantum dots?

« on: September 28, 2016, 21:36 »

Thank you sir!
So I should build a cluster using Wulff construction tool for analyzing the variation in bandgap with the change in number of atoms of Quantum dots?

6

General Questions and Answers / Re: is there a way to simulate a cluster of quantum dots?

« on: September 28, 2016, 20:50 »

Sir,
I want to analyze the variation in bandgap with the change in number of atoms of Quantum dots. For this, I am using silicon Quantum dots. I have noticed the change in bandstructure but not in bandgap when considering the bandgap as minimum energy difference between conduction and valence band.
Attached are the bandstructures that I have obtained by varying the number of atoms in 3D.

I have used the repeat option to repeat the atoms in the three directions. It does not allow the control on number of atoms. Could you any other way by which the atoms number can be increased in the structure.

7

General Questions and Answers / Re: Simulation of Photovoltaic Cell | Quantum Dots

« on: September 24, 2016, 21:36 »

I want to obtain I-V characteristics for the device with and without illumination. To be more specific, they are Quantum dot based solar cells. The size is going to be in microns (for 2D it is about 50μmx10μm). I want to obtain the I-V characteristics for the whole device.

8

General Questions and Answers / Re: is there a way to simulate a cluster of quantum dots?

« on: September 22, 2016, 19:14 »

After building quantum dots, is it possible to use them in Synopsys tools for TCAD simulations?

9

General Questions and Answers / Simulation of Photovoltaic Cell | Quantum Dots

« on: September 22, 2016, 19:05 »

Hello,
I am working on photovoltaic cell. I want to simulate it in QuantumWise. I want to know if it is possible to simulate the cell. I want to obtain I-V characteristics for the same. Also, is there a way to illuminate these devices in the software?
Later, I plan to introduce Quantum dots in the structure. How to do it?
Please help!