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SOLAR CELLS AND MODULE DIAGNOSTICS BY INFRARED THERMOGRAPHY
Shunted Solar Cells
Lock-in infrared image of a commercial mono-crystalline Si solar cell having a shunt on the finger.
Lock-in infrared image of a commercial Si solar cell having a micro-crack under the bus bar.
Lock-in infrared image of a commercial multi-crystalline Si solar cell having an extended shunt on the edge.
PV Module Diagnostic
Lock-in image of a commercial Thin film Amorphous Silicon module showing two strong shunts at the scribe lines of cells. Picture (a) & (b) shows the enlarged view of the point and extended shunts. Also, the dark line in middle of module shows the line of inactivity.
Lock-in infrared image of Si PV module showing delam
inated region (dark encircled region) and shunts (bright region).
Lock-in infrared image of PV module showing non-uniform temperature distribution of module
Lock-in image of Si module showing shunt at one of the cell edge
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