TY - JOUR AU - Sebastian Engmann AU - Adam Barito AU - Emily Bittle AU - Noel Giebink AU - Lee Richter AU - David Gundlach C2 - Nature Communications DA - 2019-10-15 DO - https://doi.org/10.1038/s41467-019-12598-4 LA - en M1 - 10 PB - Nature Communications PY - 2019 TI - Reply To: Triplet-triplet annihilation in rubrene/C60 OLEDs with electroluminescence turn-on breaking the thermodynamic limit ER -