Rational design of a high-efficiency, multivariate metal–organic framework phosphor for white LED bulbs
Abstract
Developing rare-earth element (REE) free yellow phosphors that can be excited by 455 nm blue light will help to decrease the environmental impact of manufacturing energy efficient white light-emitting diodes (WLEDs), decrease their cost of production, and accelerate their adoption across the globe. Luminescent metal–organic frameworks (LMOFs) demonstrate strong potential for use as phosphor materials and have been investigated intensively in recent years. However, the majority are not suitable for the current WLED technology due to their lack of blue excitability. Therefore, designing highly efficient blue-excitable, yellow-emitting, REE free LMOFs is much needed. With an internal quantum yield of 76% at 455 nm excitation, LMOF-231 is the most efficient blue-excitable yellow-emitting LMOF phosphor reported to date. Spectroscopic studies suggest that this quantum yield could be further improved by narrowing the material's bandgap. Based on this information and guided by DFT calculations, we apply a ligand substitution strategy to produce a semi-fluorinated analogue of LMOF-231, LMOF-305. With an internal quantum yield of 88% (λem = 550 nm) under 455 nm excitation, this LMOF sets a new record for luminescent efficiency in yellow-emitting, blue-excitable, REE free LMOF phosphors. Temperature-dependent and polarized photoluminescence (PL) studies have provided insight on the mechanism of emissionmore »
- Authors:
-
[3];
[2];
[2]
- Department of Chemistry & Chemical Biology;Rutgers University;Piscataway;USA
- Rutgers Univ., Piscataway, NJ (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1760221
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Chemical Science
- Additional Journal Information:
- Journal Volume: 11; Journal Issue: 7; Journal ID: ISSN 2041-6520
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Lustig, William P., Shen, Zeqing, Teat, Simon J., Javed, Nasir, Velasco, Ever, O'Carroll, Deirdre M., and Li, Jing. Rational design of a high-efficiency, multivariate metal–organic framework phosphor for white LED bulbs. United States: N. p., 2020.
Web. doi:10.1039/c9sc05721h.
Lustig, William P., Shen, Zeqing, Teat, Simon J., Javed, Nasir, Velasco, Ever, O'Carroll, Deirdre M., & Li, Jing. Rational design of a high-efficiency, multivariate metal–organic framework phosphor for white LED bulbs. United States. https://doi.org/10.1039/c9sc05721h
Lustig, William P., Shen, Zeqing, Teat, Simon J., Javed, Nasir, Velasco, Ever, O'Carroll, Deirdre M., and Li, Jing. Fri .
"Rational design of a high-efficiency, multivariate metal–organic framework phosphor for white LED bulbs". United States. https://doi.org/10.1039/c9sc05721h. https://www.osti.gov/servlets/purl/1760221.
@article{osti_1760221,
title = {Rational design of a high-efficiency, multivariate metal–organic framework phosphor for white LED bulbs},
author = {Lustig, William P. and Shen, Zeqing and Teat, Simon J. and Javed, Nasir and Velasco, Ever and O'Carroll, Deirdre M. and Li, Jing},
abstractNote = {Developing rare-earth element (REE) free yellow phosphors that can be excited by 455 nm blue light will help to decrease the environmental impact of manufacturing energy efficient white light-emitting diodes (WLEDs), decrease their cost of production, and accelerate their adoption across the globe. Luminescent metal–organic frameworks (LMOFs) demonstrate strong potential for use as phosphor materials and have been investigated intensively in recent years. However, the majority are not suitable for the current WLED technology due to their lack of blue excitability. Therefore, designing highly efficient blue-excitable, yellow-emitting, REE free LMOFs is much needed. With an internal quantum yield of 76% at 455 nm excitation, LMOF-231 is the most efficient blue-excitable yellow-emitting LMOF phosphor reported to date. Spectroscopic studies suggest that this quantum yield could be further improved by narrowing the material's bandgap. Based on this information and guided by DFT calculations, we apply a ligand substitution strategy to produce a semi-fluorinated analogue of LMOF-231, LMOF-305. With an internal quantum yield of 88% (λem = 550 nm) under 455 nm excitation, this LMOF sets a new record for luminescent efficiency in yellow-emitting, blue-excitable, REE free LMOF phosphors. Temperature-dependent and polarized photoluminescence (PL) studies have provided insight on the mechanism of emission and origin of the significant PL enhancement.},
doi = {10.1039/c9sc05721h},
journal = {Chemical Science},
number = 7,
volume = 11,
place = {United States},
year = {Fri Jan 10 00:00:00 EST 2020},
month = {Fri Jan 10 00:00:00 EST 2020}
}
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