Paper Information

Title:  SIMULATION AND OPTIMIZATION OF SOLAR CELL TOP CONTACT PATTERN WITH PC1D
Type: PAPER
Author(s): BEHAFARID FARZAD,ARZI EZATOLLAH,ASL SOLEIMANI EBRAHIM
 
 
 
Name of Seminar: IRAN PHYSICS CONFERENCE
Type of Seminar:  CONFERENCE
Sponsor:  PHYSICS SOCIETY OF IRAN
Date:  2005Volume -
 
 
Abstract: 

THE TOP CONTACT PATTERN DESIGN IS AN IMPORTANT PART OF AN OPTIMIZATION PROCEDURE OF SOLAR CELL EFFICIENCY. THE INCREASING THE DISTANCE BETWEEN THE FINGERS WILL INCREASE THE LATERAL RESISTANCE AND THUS INCREASES THE SERIES RESISTANCE, WHICH IN TURN DECREASES THE EFFICIENCY. ON THE OTHER HAND, DECREASING THE FINGERS DISTANCE WILL INCREASE THE SHADOWING AND THUS INCREASES THE LIGHT LOSSES CAUSING A DECREASE IN THE EFFICIENCY. THE EXISTENCE OF THE LATERAL CURRENT MAKES THIS PROBLEM A TWO DIMENSIONAL TYPE AND THUS WE CANNOT USE PC1D, WHICH IS DESIGNED FOR SIMULATING ONE-DIMENSIONAL PROBLEM, DIRECTLY. SO, WE ANALYTICALLY DEFINED AND INTRODUCED AN EQUIVALENT RESISTANCE FOR EACH ENERGY LOSSES INCLUDING THE LATERAL CURRENT LOSSES, RESISTANCE BETWEEN TOP CONTACT METAL AND SEMICONDUCTOR, AND OHMIC RESISTANCE OF THE TOP CONTACT. THE FINAL TOTAL RESISTANCE THEN ENTERED IN THE PC1D AS A SERIES RESISTANCE. BY SIMULATING THE SOLAR CELL WITH DIFFERENT DISTANCES BETWEEN FINGERS, THE GRAPH OF THE VARIATION OF EFFICIENCY VERSUS FINGER DISTANCE WAS PLOTTED. IN EFFECT, A TWO-DIMENSIONAL PROBLEM IS SOLVED BY A ONE-DIMENSIONAL SOFTWARE. THE PLOTTED GRAPH HAS A PEAK, WHICH DETERMINES THE BEST DIMENSION OF THE TOP CONTACT PATTERN. FOR A CELL WHOSE PARAMETERS DESCRIBED IN THIS PAPER, THE OPTIMUM DISTANCE FOR FINGERS IS FOUND TO BE 3.58 MM.

 
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