Densities of states and band widths of excitons in anthracene microcrystallites embedded in PMMA

Persistent hole-burning of perylene microcrystallites dispersed in PVA

“…This size gives one order smaller compared to that we have obtained on aromatic MCs, for instance anthracene MCs [7]. Since we wished to see physics in small crystallites we needed the small molecular aggregates.…”

Functional Organic Nanocrystals

“…nonlinear optics, semiconductor lasing, and quantum dot applications). For organic nanocrystals, however, nanocrystals fabrication has so far rarely been investigated, owing to their thermal instability, except for the thermally stable phthalocyanine and a kind of low molecular weight aromatic compounds which were nanocrystallized by an evaporation method in an inert gas (Granqvist et al, 1976) or by a crystal growth technique in a porous polymer (Matsui et al, 1995). Recently, we have proposed a simple and convenient method for the fabrication of organic nanocrystals, what we call the reprecipitation method (Kasai et al, 1992).…”

Stimulated emission from anthracene aggregates in fluorene crystals fabricated by cell method

“…In the course of this study, anthracene(A)(C 14 H 10 )-fluorene(F)(C 13 H 10 ) mixed crystal with various concentration of anthracene have been investigated in detail in order to clarify optical properties of aggregates in single crystal matrices. It was found that there are two kinds of luminescence bands due to anthracene dimers, D 1 and D 2 , in the fluorene single crystals doped with a few% of anthracene [2]. The D 1 luminescence band is relatively sharp with zero Stokes shift.…”

“…We have studied on microcrystallites and aggregates of aromatic molecules to investigate how the energy and characteristics of excited state depends on their size [1][2][3]. In the course of this study, anthracene(A)(C 14 H 10 )-fluorene(F)(C 13 H 10 ) mixed crystal with various concentration of anthracene have been investigated in detail in order to clarify optical properties of aggregates in single crystal matrices.…”