Koprek, A.; Zabierowski, P.; Pawlowski, M.; Sharma, L.; Freysoldt, C.; Gault, B.; Würz, R.; Cojocaru-Mirédin, O.: Effect of Cd diffusion on the electrical properties of the Cu(In,Ga)Se₂ thin-film solar cell. Solar Energy Materials and Solar Cells 224, 110989 (2021)

Colombara, D.; Elanzeery, H.; Nicoara, N.; Sharma, D.; Claro, M.; Schwarz, T.; Koprek, A.; Wolter, M. H.; Melchiorre, M.; Sood, M. et al.; Valle, N.; Bondarchuk, O.; Babbe, F.; Spindler, C.; Cojocaru-Mirédin, O.; Raabe, D.; Dale, P. J.; Sadewasser, S.; Siebentritt, S.: Chemical instability at chalcogenide surfaces impacts chalcopyrite devices well beyond the surface. Nature Communications 11 (1), 3634 (2020)

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)