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Koprek, A.; Cojocaru-Mirédin, O.; Würz, R.; Freysoldt, C.; Gault, B.; Raabe, D.: Cd and Impurity Redistribution at the CdS/CIGS Interface After Annealing of CIGS-Based Solar Cells Resolved by Atom Probe Tomography. IEEE Journal of Photovoltaics 7 (1), 7762819, pp. 313 - 321 (2017)

Koprek, A.; Cojocaru-Mirédin, O.; Würz, R.; Freysoldt, C.; Raabe, D.: Cd and impurity redistribution at the p-n junction of CIGS based solar cells resolved by atom-probe tomography. In: Photovoltaic Specialist Conference (PVSC), pp. 1 - 6 (Ed. IEEE ). Photovoltaic Specialist Conference (PVSC), 2015 IEEE 42nd , New Orleans, LA, USA, June 14, 2015 - June 19, 2015. (2015)

Koprek, A.; Cojocaru-Mirédin, O.; Freysoldt, C.; Würz, R.; Raabe, D.: Atom probe tomography study of the p-n junction in CIGS thin-film solar cells. 79th Annual Meeting of the DPG and DPG Spring Meeting, Berlin, Germany (2015)

Koprek, A.; Cojocaru-Mirédin, O.; Freysoldt, C.; Würz, R.; Raabe, D.: Atomic scale investigation of the p-n Junction in CIGS based solar cells: correlation between cell efficiency and impurities. E-MRS 2014, Lille, France (2014)

Koprek, A.: Element redistribution and defect formation at the CdS/CIGS interface. Dissertation, RWTH Aachen, Aachen, Germany (2017)