Suppressing Nonradiative Processes of Organic Dye with Metal-Organic Framework Encapsulation toward Near-Infrared Solid-State Microlasers

Yuan Liu, Haiyun Dong, Kang Wang, Zhenhua Gao, Chunhuan Zhang, Xiaolong Liu, Yong Sheng Zhao, Fengqin Hu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

Organic materials are an important class of gain media for fabricating miniaturized lasers because they combine fabrication simplicity with wide spectral coverage and tunability. However, progress toward near-infrared (NIR) organic solid-state lasers has been limited because of serious nonradiative processes originating from the severe intermolecular interaction in the condensed state. Here, we develop a strategy to realize room-temperature NIR microscale lasers through encapsulating organic dyes into the cavities of metal-organic frameworks (MOFs). The spatial confinement of the dye molecules within the MOF pores contributes to suppressing the multiple nonradiative processes (i.e., aggregation-caused quenching and exciton-exciton annihilation). This results in a much higher radiative efficiency and thus much easier population inversion and low-threshold NIR lasing. Furthermore, the lasing wavelength can be further expanded based on the tailorable energy levels of the dye molecules. The results will provide useful enlightenment for the development of miniaturized NIR laser sources for new photonic applications.

Original languageEnglish
Pages (from-to)35455-35461
Number of pages7
JournalACS Applied Materials and Interfaces
Volume10
Issue number41
DOIs
Publication statusPublished - 17 Oct 2018
Externally publishedYes

Keywords

  • intramolecular charge transfer
  • metal-organic framework
  • near-infrared laser
  • nonradiative process
  • organic nanophotonics

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