Structure analysis of CIGS solar cells by CV characteristics under monochromatic light at low-temperature levels

CIGS solar cells are studied with CV/MCV measurements in a wide range of temperatures. Using a simple model, we succeeded in obtaining shallow trap levels in the bulk from the value of reduction of depletion region width by monochromatic light of proper wavelength. The MCV characteristics are powerful methods to analyze the parameters of multi-layer light-sensitive devices as CIGS solar cells.