Exciton-Phonon Interaction in Phenanthrene Single Crystalsunder Pressure

Mizuno, Ken-ichi; Furukawa, Mitsuhiro; Matsui, Atsuo

doi:10.1143/jpsj.60.2768

Cited by 5 publications

(2 citation statements)

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“…The magnitude of the exciton-phonon coupling constant g is related to exciton band width B and lattice relaxation energy upon exciton self-trapping, E LR , by g = E LR /B. In bulk crystals of aromatic molecules, it is known that g is empirically expressed by a simple function of the intermolecular distance d between nearest neighbour, plane-parallel molecules [7]. The parameter g decreases against d for d > 0.5 nm.…”

Section: Discussion With Reference To D-g Diagrammentioning

confidence: 99%

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Difference in optical properties of anthracene molecule aggregates in fluorene and phenanthrene crystals

Aoki-Matsumoto

Noda

Mizuno

2010

Phys. Status Solidi (c)

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Optical properties of anthracene molecules in phenanthrene crystals with anthracene concentration of 0.03% to 8.4% were investigated and compared with those in fluorene crystals. In contrast to fluorene system where two kinds of dimers, one of which is accompanied by lattice relaxation, are observed, it was found that only one kind of dimers without lattice relaxation are observed in phenanthrene system. Also in aggregates of anthracene in higher concentration samples, the luminescence is a ‘free exciton’‐type in phenanthrene crystals in contrast to a ‘self‐trapped exciton’‐type in fluorene crystals. With reference to the variation of the magnitude of exciton–phonon coupling constant on nearest neighbour distance of molecules known for bulk crystals of aromatic molecules, the difference is attributed to longer inter molecular distance between anthracene molecules in phenanthrene matrix in comparison to those in fluorene matrix (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Section: Discussion With Reference To D-g Diagrammentioning

confidence: 99%

“…Values of g estimated from the d-g diagram in Ref. [7] are listed in Table 1. They are larger or smaller than unity for fluorene and phenanthrene crystals, respectively.…”

Section: Discussion With Reference To D-g Diagrammentioning

confidence: 99%