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Metal organic framework (MOF) yellow phosphors and their applications in white light emitting devices

A metal-organic framework, organic ligand technology, applied in semiconductor devices of light-emitting elements, 2/12 group organic compounds without C-metal bonds, optical elements for changing the spectral characteristics of emitted light, etc. And other issues

Active Publication Date: 2017-02-22
RUTGERS THE STATE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Most commercially available products today are PC-LEDs, not RGB-LEDs because the latter type is more expensive

Method used

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  • Metal organic framework (MOF) yellow phosphors and their applications in white light emitting devices
  • Metal organic framework (MOF) yellow phosphors and their applications in white light emitting devices
  • Metal organic framework (MOF) yellow phosphors and their applications in white light emitting devices

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Experimental program
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Embodiment Construction

[0093] 1. Computational screening of fluorescent ligands

[0094] The emission properties of a range of organic molecules were evaluated using density functional theory (DFT) calculations. Calculations were performed using the Guassian 09 suite of programs. Apply B3LYP 2-4 Hybrid functionals and DGDZVP basis sets. Corrected bandgap (E 校正 ) is the experimental bandgap based on tcbpe. From Table 2, the possible yellow emission candidates are tcbpe, tcbpe-F, ttzbpe and tctpe.

[0095] Table 2. Computational studies of the luminescent properties of potential ligands

[0096]

[0097]

[0098]

[0099]

[0100] 2. Ligand Synthesis

[0101] A general synthesis of tpe-based ligands can be found in Scheme 1. The starting material tpe-Br was synthesized according to the reported method (V.S.Vyas, M. Banerjee and R. Rathore, Tetrahedron Letters, 2009, 50, 6159-6162).

[0102]

[0103] Reaction Scheme 1. General Synthesis of TPE-Based Ligands

[0104] The synthesi...

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Abstract

The present application discloses the first rare-earth-free metal organic framework (MOF) yellow phosphors that can be effectively excited by blue light and assembled in a white light emission (WLED) device with a blue chip. The compounds of the present invention exhibit significantly enhanced emission intensity compared to the constituent ligand and high quantum yield and high thermal and moisture stability and photoluminescence. The invention also includes light emitting devices comprising any of these MOF yellow phosphors and methods of preparing these compounds and devices.

Description

[0001] Cross References to Related Applications [0002] This application claims priority under 35 USC §119(e) to US Provisional Patent Application Serial No. 61 / 984,154, filed April 25, 2015, the entire contents of which are incorporated herein by reference. [0003] Statement Regarding Federally Funded Research [0004] This invention was made in part with government support under Grant No. DMR-1206700 awarded by the National Science Foundation. The government has certain rights in this invention. technical field [0005] The present invention relates to metal organic frameworks useful as yellow phosphors and their use in white light emitting devices. Background technique [0006] White light-emitting diodes (WLEDs) are gradually replacing incandescent and fluorescent lamps due to their lower energy consumption, higher efficiency and longer lifetime. Existing methods for fabricating WLEDs include (a) three primary color LED chips, a combination of red, green, and blue (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F3/06
CPCC07F3/003C09D5/22C09K11/06F21V9/40Y02B20/00C09K2211/183C09K2211/188F21K9/64F21Y2115/10F21V9/30
Inventor 李静胡志超龚奇涵
Owner RUTGERS THE STATE UNIV
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