TY - GEN AU - Ciesielski,Richard AU - Schäfer,Frank AU - Hartmann,Nicolai F AU - Giesbrecht,Nadja AU - Bein,Thomas AU - Docampo,Pablo AU - Hartschuh,Achim TI - Grain Boundaries Act as Solid Walls for Charge Carrier Diffusion in Large Crystal MAPI Thin Films SN - 1944-8252 PY - 2018///0731 N1 - Publication Type: Journal Article UR - https://doi.org/10.1021/acsami.7b17938 ER -