Phototuning Selectively Hole and Electron Transport in Optically Switchable Ambipolar Transistors - Rekab, W; Leydecker, T; Hou, L; Chen, H; Kirkus, M; Cendra, C; Herder, M; Hecht, S; Salleo, A; McCulloch, I; Orgiu, E; Samori, P (ADVANCED FUNCTIONAL MATERIALS, 2020)