CHEMICAL PHYSICS

Tracking triplets in pentacene polymers

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Science  30 Sep 2016:
Vol. 353, Issue 6307, pp. 1510-1511
DOI: 10.1126/science.353.6307.1510-g

Singlet fission is like a two-for-one sale in a solar cell: Light absorption populates a singlet state that splits into two triplet carriers. Key questions for efficient implementation of this phenomenon are how to optimize the formation of the triplets and then how to keep them apart afterward. Sanders et al. systematically studied singlet fission in oligomers and polymers of pentacene, a compound explored extensively for this purpose already as a monomer and dimer. They found that the fission rate gets faster as the pentacene chains get longer, though the consistently short lifetime of the triplet pair afterward is length-independent.

Chem 1, 505 (2016).

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