Delayed Luminescence Spectroscopy of Organic Photovoltaic Binary Blend Films: Probing the Emissive Non-geminate Charge Recombination - Keivanidis,PE; Kamm,V; Dyer-Smith,C; Zhang,W; Laquai,F; McCulloch,I; Bradley,DDC; Nelson,J (ADVANCED MATERIALS, 2010)