Lifetime and substrate doping measurements of solar cells and application to in-line process control

Advanced cell characterization, through the measurement of effective lifetime and substrate doping at the cell level, as a supplement to conventional cell test parameters and an application to in-line solar cell testing is discussed in this paper. A variety of solar cell samples including Al BSF, monocrystalline PERC, and multi-crystalline PERC cells were measured using the Sinton Instruments FCT-750. This in-line solar cell tester performs a Suns-Voc, injection-dependent lifetime, and substrate doping measurement to supplement the conventional cell test results. The importance of the effective lifetime and doping advanced characterization for in-line measurements will be discussed in this paper.