Chiang, C., Kimyonok, A., Etherington, M. K., Griffiths, G. C., Jankus, V., Turksoy, F., & Monkman, A. P. (2013). Ultrahigh Efficiency Fluorescent Single and Bi-Layer Organic Light Emitting Diodes: The Key Role of Triplet Fusion. Advanced Functional Materials, 23(6), 739-746. https://doi.org/10.1002/adfm.201201750