Etzold, F., Howard, I. A., Forler, N., Melnyk, A., Andrienko, D., Hansen, M. R., et al. (2015). Sub-ns triplet state formation by non-geminate recombination in PSBTBT: PC70BM and PCPDTBT:PC60BM organic solar cells. Energy & Environmental Science, 8(5), 1511-1522. doi:10.1039/c4ee03630a.