Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Synergy in energy transfer between ligand and EuIII ion in molecular Europium complex: a single-component white light emissive luminogens

Abstract

Promoting from the structural flexibility and easy solution process capability, single component white light emitting pure organo-lanthanide complexes have considered as a promising candidate for solid state lighting. Here in we report a series of ancillary ligand by using imidazo-bipyridyl derivatives and dibenzoylmethane (DBM), as anionic ligand are employed to synthesized ternary Eu(III) complex Eu(DBM)3L-mCF3, Eu(DBM)3L-pCF3, Eu(DBM)3L-pCH3, Eu(DBM)3L-Naph-OCH3. The photophysical and electrochemical properties of the ligand and their Eu(III) complexes were carefully investigated and the energy transfer mechanism were understood by combined experimental and theoretical calculation. Multiple-emission from both ligand and Eu(III)-ion leads to single component white light emission. White LED was fabricated by conjugating the Eu-complex with near UV LED, the results showed superior performance (CIE (x = 0.33, y = 0.33, close to NTSC standard for pure white emission), CCT (5386K) and CRI (63%)). The selected Eu-complex was further coated on blue LED chip and the corresponding white LED showed CIE (x = 0.36, y = 0.35), CCT (4234K) and CRI (75%). In addition, taking benefit of dual characteristic emission of the Eu-complexes, the ratiometric sensing behavior was explored. The Eu(DBM)3L-mCF3 have the relative sensitivity value of 4.9% K-1 at 323 K.

Back to tab navigation

Supplementary files

Article information


Submitted
16 Mar 2020
Accepted
13 May 2020
First published
14 May 2020

J. Mater. Chem. C, 2020, Accepted Manuscript
Article type
Paper

Synergy in energy transfer between ligand and EuIII ion in molecular Europium complex: a single-component white light emissive luminogens

R. Devi, K. Singh and S. Vaidyanathan, J. Mater. Chem. C, 2020, Accepted Manuscript , DOI: 10.1039/D0TC01360A

Social activity

Search articles by author

Spotlight

Advertisements