Excitation Wavelength Dependent Internal Quantum Efficiencies in a P3HT / Non-Fullerene Acceptor Solar Cell

The authors declare no competing financial interests. The author CH Tan thanks Malaysian Government MyBrainSc for the funding and also Matthew Davies from Swansea University for providing PL excitation spectroscopy instrument. Funding from the KAUST project OSR-2015-CRG-2572 is gratefully acknowledged. The authors also thank KAUST for financial support and acknowledge EC FP7 Project SC2 (610115), EC H2020 (643791), and EPSRC Projects EP/G037515/1 and EP/M005143/1.