van Duren S. Sylla D. Fairbrother A. Sánchez Y. López-Marino S. Márquez Prieto J.A. Izquierdo-Roca V. Saucedo E. Unold T. "Pre-annealing of metal stack precursors and its beneficial effect on kesterite absorber properties and device performance" solar-energy-materials-and-systems Energy Materials and solar-energy-materials-and-systems Cells 185, pp. 226 - 232. 2018 DOI: 10.1016/j.solmat.2018.04.022