Efficient free triplet generation follows singlet fission in diketopyrrolopyrrole polymorphs with goldilocks coupling

1. Levine, A.M.
2. He, G.
3. Bu, G.
4. Ramos, P.
5. Wu, F.
6. Soliman, A.
7. Serrano, J.
8. Pietraru, D.
9. Chan, C.
10. Batteas, J.D.
11. Kowalczyk, M.
12. Jang, S.J.
13. Nannenga, B.L.
14. Sfeir, M.Y.
15. Tsai, E.H.R.
16. Braunschweig, A.B.