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. 2019 Aug 30;19:1079–1089. doi: 10.1016/j.isci.2019.08.053

Scheme 1.

Scheme 1

Schematic for Anisotropic Singlet Fission in Hexacene Single Crystal

Anisotropic 1(T1T1) states are formed along the short b and long a axes directly from the hot S1S0 state. The rate for quantum decoherence along the short b axis is almost twice that along the long a axis. 1(T1aT1a) and 1(T1bT1b) represent correlated triplet pair states along the a and b axes, whereas T1a + T1a and T1b + T1b are triplet states along the a and b axes.