2. Overview
• MATLAB code giving real time data for the band
gap parameters for III-V ternary compounds
• Equivalent Circuit for Solar Cell Simulation
• Dual Junction Current Matched and Voltage
Matched conditions
• Triple Junction Current Matched Condition
• Future Work
5. Band Gap Parameters for LEDs and Solar
Cells (MATLAB Code)
• Backward Compatible: The Number of
Compounds can be increased up to the required
value. The corresponding 2x2 matrix generated.
• Requests the user the lattice constant.
• Requests from the user the tolerance
percentage for the lattice parameter to
determine the band gap ratios for creating a
multi-junction solar cell
• Plots the feasible band gaps on the graph of
Band-gap energy vs. Lattice Constant
14. Triple Junction Current Matched Circuit
Simulation
All three diodes
Second and third
diode
Third diode
15. Plan (as decided on 13 June 2012)
– Illuminated p-n junctions , electric field in p-n junctions
22nd June
– QUCS / Spice Modeling 29th June
– Literature for Dual Junction, Equivalence Circuit
(Voltage as well as Series matched) 13th July
– Comparison between Dual Junction Voltage matched and
Series matched models 20th July
– Triple Junction, Voltage Match Circuit model 27th July
16. Future Work
• Current vs. Operating Voltage characteristics for
III-V compounds based on Empirical Data
• Triple Junction Voltage Matched Circuit with the
bandgap values extracted from the MATLAB
code
• Bandgap parameter data for III-V quaternary
compounds
