Tutorial on SCAPS-1D simulation tool.pptx

Tutorial on SCAPS-1D

1. SCAPS

2. About SCAPS One dimensional solar cell simulation program Developed at the department of Electronics and Information Systems (ELIS) of the University of Gent, Belgium. Alex Niemegeers Marc Burgelman Koen Decock Johan Verschraegen Stefaan Degrave . The program is freely available

3. Originally developed for cell structures of the CuInSe2 and the CdTe family. Now also applicable to crystalline solar cells (Si and GaAs family) and amorphous cells (a-Si and micromorphous Si). Up to 7 semiconductor layers can be added. Almost all parameters can be graded : Eg , χ, ε, NC, NV, vthn , vthp , μn , μp , NA, ND, and Nt Recombination mechanisms: band-to-band (direct), Auger, SRH-type About SCAPS

4. Charge type: no charge ( idealisation ), monovalent (single donor, acceptor), divalent (double donor, double acceptor, amphoteric), multivalent (user defined) The charge state and recombination is accounted for . Energetic distributions: single level, uniform, Gauss or tail. Optical property filter: reflection of transmission filter About SCAPS

5. Optical property: direct excitation with light possible Illumination: a variety of standard and other spectra included: AM0, AM1.5D, AM1.5G, AM1.5. illumination: from either the p -side or the n -side; spectrum cut-off and attenuation Generation: either from internal calculation or from user Intra-band tunneling: within a conduction band or within a valence band. About SCAPS

6. Working point for calculations: voltage, frequency, temperature Possible calculations: energy bands, concentrations and currents at a given working point, J-V characteristics, ac characteristics, spectral response (also with bias light or voltage). Batch calculations possible; presentation of results and settings as a function of batch parameters Loading and saving of all settings; startup of SCAPS in a personalized configuration; a script language including a free user function About SCAPS

7. Very intuitive user interface A script language facility to run SCAPS from a ‘script file’; all internal variables can be accessed and plotted via the script. A built-in curve fitting facility. A panel for the interpretation of admittance measurements About SCAPS

8. SOFTWARE WORKING

9. Define the problem, the geometry, the materials, all properties of your solar cell Indicate the circumstances in which you want to do the simulation. Indicate what you will calculate. Start the calculation(s) Display the simulated curves.

10. Solar cell definition To start designing the solar cell first click on the “Set Problem” button in the main window. This will open another window. Click on “Add Layer” to start adding different layers to the cell

11. Solar cell definition 1. Manually Enter properties of material 2. Add absorption properties from library 3. Define recombination parameters. 4. Select material from library. crystalline solar cells & Amorphous cells (Si, GaAs, CuInSe2 and the CdTe family).

12. Solar cell definition 1. User can decide on which surface the light falls.

13. Solar cell definition 2. ‘apply voltage V to’: when ‘left’ is set, then the right contact is the reference contact, and the voltage V is applied to the left contact. When ‘right’ is set, the left contact is the reference contact, and the voltage V is applied to the right contact. 3. ‘current reference as a’: when ‘consumer’ is set, then the current reference arrow is set such that P = J x V is the power consumed by the cell, and thus - J x V the power generated by the cell. When ‘generator’ is set, then the current reference arrow is set such that P = J x V is the power generated by the cell, and thus - J x V the power consumed by the cell. Setting of the current reference arrow thus depends both on the selected voltage reference and on the consumer/generator selection.

14. Solar cell definition 4. The contact properties can be set by either clicking the front or back contact button on the cell definition panel, which opens the ‘contact properties panel’.