TY - JOUR A1 - Horbelt, Renate A1 - Ebert, Stefanie A1 - Ulbikaite, Vaidvile A1 - Hahn, Giso A1 - Job, Reinhart A1 - Terheiden, Barbara T1 - Al-density variation as one driving force for void formationin PERC solar cells JF - Physica Status Solidi (RRL) Y1 - 2016 U6 - http://dx.doi.org/10.1002/pssr.201600078 VL - 10 IS - 7 SP - 515 EP - 519 ER -