Material Crystallinity as a Determinant of Triplet Dynamics and Oxygen Quenching in Donor Polymers for Organic Photovoltaic Devices - Soon,YW; Shoaee,S; Ashraf,RS; Bronstein,H; Schroeder,BC; Zhang,W; Fei,Z; Heeney,M; McCulloch,I; Durrant,JR (ADVANCED FUNCTIONAL MATERIALS, 2014)