Performance Characterization and Remedy of Experimental CuInGaSe2 Mini-Modules: Preprint

Research output: Contribution to conferencePaper

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 languageAmerican English
Number of pages8
StatePublished - 2011
Event37th IEEE Photovoltaic Specialists Conference (PVSC 37) - Seattle, Washington
Duration: 19 Jun 201124 Jun 2011

Conference

Conference37th IEEE Photovoltaic Specialists Conference (PVSC 37)
CitySeattle, Washington
Period19/06/1124/06/11

NREL Publication Number

  • NREL/CP-5200-51812

Keywords

  • CIGS
  • mini-modules
  • performance characterization
  • PV

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