REGARDING QUASI 3D SOLVER IN SOLCORE

[Sagnikbas]

Please, confirm the following:

• I have checked Solcore’s documentation and could not find the answer.
• I haven’t found any other issue on a related topic.

What’s the question?
Please, be concise and straight to the point

Additional information
Add any other relevant information that could help us answering your question, E.g.:

• Code of a minimum working example showing what you’re trying to do.
• Screenshot showing the problem you are talking about.
• Context in which your question applies
  plt.imshow(Vall[:, :, -2, -1])

What does the indices -2 and -1 mean in the Quasi 3D code in solcore documentation(examples) page ?

[dalonsoa]

This needs to be properly described in the documentation, but there is some information in the solve_quasi_3D docstring - in here.

• The -1 means that we are asking for the last voltage step - in the case of the example, 1.3 V.
• The -2 means that we are asking foir the voltage of the top junction, just under the top series resistance.

As I said, this should be explained in the documentation, so thanks for pointint it out.

[Sagnikbas]

Dear Sir,
We are using crystalline Silicon solar cell 1 junction, and using quasi 3D solver to generate the voltage map. The junction definition which I am using is
db_junction2 = Junction(kind='2D', T=T, Tref=298, j01=702e-11, j02=25.9e-5,Eg=1.12,A=1,jsc=372, R_sheet_top=80, R_sheet_bot=0,
R_shunt=1.6, n=3.42), is this description correct?
jo1,jo2,jsc values are all measured ones and operating at Vmpp = [0.53V]
I am attaching the voltage map, the metal grids having voltage 0.53V, while other regions have higher voltage,

please look at it.

[Sagnikbas]

Respected Sir, Can you send me a sample code regarding Quasi-3D Model to generate voltage map for Indirect Bandgap Material like Silicon? Here we are inserting measured values of Jo1,Jo2 and Jsc, so in the 2Diode model code , I think the code is not considering the light source i.e "Standard 1.5G " source, so the generated voltage map and IV curve for quarter mask and the entire mask is not coming same. If you can send a 2 Diode model code for Si solar cell, considering the 1.5G light source will be really helpful. Yours sincerely Sagnik Basu Indian Institute of Technology Madras

…

On Fri, Nov 26, 2021 at 4:14 PM Diego Alonso Álvarez < ***@***.***> wrote: This needs to be properly described in the documentation, but there is some information in the solve_quasi_3D docstring - in here <https://github.com/qpv-research-group/solcore5/blob/2ca5ffb3a34e076023ce7604259db07945880c0a/solcore/spice/quasi_3D_solver.py#L27> . - The -1 means that we are asking for the last voltage step - in the case of the example, 1.3 V. - The -2 means that we are asking foir the voltage of the top junction, just under the top series resistance. As I said, this should be explained in the documentation, so thanks for pointint it out. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#208 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AWOZF3U6VXOQTSR6PPC4FM3UN5QKLANCNFSM5IQURVWQ> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>.