Color-Tunable and High-Efficiency Dye-Encapsulated Metal-Organic Framework Composites Used for Smart White-Light-Emitting Diodes

ACS Applied Materials & Interfaces
Wenwei ChenRong-Jun Xie

Abstract

Luminescent metal-organic frameworks (MOFs) (typically dye-encapsulated MOFs) are considered as one kind of interesting downconversion materials for white-light-emitting diodes (LEDs), but their quantum efficiency (QE) is not sufficient and thus needs to be significantly enhanced for practical applications. In this study, we successfully synthesized a series of Rh@bio-MOF-1 (Rh = rhodamine) with an internal QE as high as ∼79% via a solvothermal reaction followed by cation exchanges. The high efficiency of the Rh@bio-MOF-1 composites was attributable to the high intrinsic luminescent efficiency of the selected Rh dyes, the confinement effect in the bio-MOF-1 host, and the uniform particle morphology. The emission maximum could be continuously tuned from 550 to 610 nm by controlling the species and concentration of encapsulated dye molecules, showing great color tunability of the dye-encapsulated MOFs. The emission lifetime of ∼7 ns was 1 or 2 magnitude orders shorter than that of Ce3+- or Eu2+-doped inorganic phosphors, allowing for visible light communication (VLC). White LEDs, fabricated by using the synthesized Rh@bio-MOF-1 composite and inorganic phosphors of green (Ba,Sr)2SiO4:Eu2+ and red CaAlSiN3:Eu2+, exhibited a high co...Continue Reading

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Citations

May 2, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Ningzi ZhangZhiguo Xia
Jan 31, 2020·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Xiaomeng ZhouLi Shang
Feb 2, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Ning XuGuoan Zhang
Jan 12, 2021·Chemical Communications : Chem Comm·Meiling LiQinhe Pan
Jul 19, 2021·Journal of Colloid and Interface Science·Wenzhe XingJing Cuan
Feb 1, 2019·Journal of the American Chemical Society·José Antônio do Nascimento NetoFelipe Terra Martins
Nov 4, 2020·ACS Applied Materials & Interfaces·Jia-Cheng YinXian-He Bu

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