Abstract
We employed current-voltage (I-V), quantum efficiency (QE), photoluminescence (PL), electroluminescence (EL), lock-in thermography (LIT), and (electrochemical) impedance spectroscopy (ECIS) to complementarily characterize the performance and remedy for two pairs of experimental CuInGaSe2 (CIGS) mini-modules. One pair had the three scribe-lines (P1/P2/P3) done by a single pulse-programmable laser,and the other had the P2/P3 lines by mechanical scribe. Localized QE measurements for each cell strip on all four mini-modules showed non-uniform distributions that correlated well with the presence of performance-degrading strips or spots revealed by PL, EL, and LIT imaging. Performance of the all-laser-scribed mini-modules improved significantly by adding a thicker Al-doped ZnO layer andreworking the P3 line. The efficiency on one of the all-laser-scribed mini-modules increased notably from 7.80% to 8.56% after the performance-degrading spots on the side regions along the cell array were isolated by manual scribes.
| Original language | American English |
|---|---|
| Number of pages | 8 |
| State | Published - 2011 |
| Event | 37th IEEE Photovoltaic Specialists Conference (PVSC 37) - Seattle, Washington Duration: 19 Jun 2011 → 24 Jun 2011 |
Conference
| Conference | 37th IEEE Photovoltaic Specialists Conference (PVSC 37) |
|---|---|
| City | Seattle, Washington |
| Period | 19/06/11 → 24/06/11 |
NREL Publication Number
- NREL/CP-5200-51812
Keywords
- CIGS
- mini-modules
- performance characterization
- PV