Single-Crystalline Optical Microcavities from Luminescent Dendrimers

Kohei Iwai, Hiroshi Yamagishi, Colin Herzberger, Yuji Sato, Hayato Tsuji, Ken Albrecht, Kimihisa Yamamoto, Fumio Sasaki, Hiroyasu Sato, Aswin Asaithambi, Axel Lorke, Yohei Yamamoto

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Microcrystallites are promising minute mirrorless laser sources. A variety of luminescent organic compounds have been exploited along this line, but dendrimers have been inapplicable owing to their fragility and extremely poor crystallinity. Now, a dendrimer family that overcomes these difficulties is presented. First-, second-, and third-generation carbazole (Cz) dendrimers with a carbon-bridged oligo(phenylenevinylene) (COPV2) core (GnCOPV2, n=1–3) assemble to form microcrystals. The COPV2 cores align uni/bidirectionally in the crystals while the Cz units in G2- and G3COPV2 align omnidirectionally. The dendrons work as light-harvesting antennas that absorb non-polarized light and transfer it to the COPV2 core, from which a polarized luminescence radiates. Furthermore, these crystals act as laser resonators, where the lasing thresholds are strongly coupled with the crystal morphology and the orientation of COPV2, which is in contrast with the conventional amorphous dendrimers.

Original languageEnglish
Pages (from-to)12674-12679
Number of pages6
JournalAngewandte Chemie - International Edition
Volume59
Issue number31
DOIs
Publication statusPublished - Jul 27 2020

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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