Rapid microwave preparation of highly efficient Ce 3+-substituted garnet phosphors for solid state white lighting

Alexander Birkel, Kristin A. Denault, Nathan C. George, Courtney E. Doll, Bathylle Héry, Alexander A. Mikhailovsky, Christina S. Birkel, Byung Chul Hong, Ram Seshadri

Research output: Contribution to journalArticle

139 Citations (Scopus)

Abstract

Ce 3+-substituted aluminum garnet compounds of yttrium (Y 3Al 5O 12) and lutetium (Lu 3Al 5O 12)-both important compounds in the generation of (In,Ga)N-based solid state white lighting-have been prepared using a simple microwave heating technique involving the use of a microwave susceptor to provide the initial heat source. Carbon used as the susceptor additionally creates a reducing atmosphere around the sample that helps stabilize the desired luminescent compound. High quality, phase-pure materials are prepared within a fraction of the time and using a fraction of the energy required in a conventional ceramic preparation; the microwave technique allows for a reduction of about 95% in preparation time, making it possible to obtain phase pure, Ce 3+-substituted garnet compounds in under 20 min of reaction time. It is estimated that the overall reduction in energy compared with ceramic routes as practised in the lab is close to 99%. Conventionally prepared material is compared with material prepared using microwave heating in terms of structure, morphology, and optical properties, including quantum yield and thermal quenching of luminescence. Finally, the microwave-prepared compounds have been incorporated into light-emitting diode "caps" to test their performance characteristics in a real device, in terms of their photon efficiency and color coordinates.

Original languageEnglish (US)
Pages (from-to)1198-1204
Number of pages7
JournalChemistry of Materials
Volume24
Issue number6
DOIs
StatePublished - Mar 27 2012
Externally publishedYes

Fingerprint

Garnets
Phosphors
Microwave heating
Lighting
Microwaves
Lutetium
Yttrium
Quantum yield
Aluminum
Light emitting diodes
Luminescence
Quenching
Carbon
Photons
Optical properties
Color
Hot Temperature

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

Cite this

Birkel, A., Denault, K. A., George, N. C., Doll, C. E., Héry, B., Mikhailovsky, A. A., ... Seshadri, R. (2012). Rapid microwave preparation of highly efficient Ce 3+-substituted garnet phosphors for solid state white lighting. Chemistry of Materials, 24(6), 1198-1204. https://doi.org/10.1021/cm3000238

Rapid microwave preparation of highly efficient Ce 3+-substituted garnet phosphors for solid state white lighting. / Birkel, Alexander; Denault, Kristin A.; George, Nathan C.; Doll, Courtney E.; Héry, Bathylle; Mikhailovsky, Alexander A.; Birkel, Christina S.; Hong, Byung Chul; Seshadri, Ram.

In: Chemistry of Materials, Vol. 24, No. 6, 27.03.2012, p. 1198-1204.

Research output: Contribution to journalArticle

Birkel, A, Denault, KA, George, NC, Doll, CE, Héry, B, Mikhailovsky, AA, Birkel, CS, Hong, BC & Seshadri, R 2012, 'Rapid microwave preparation of highly efficient Ce 3+-substituted garnet phosphors for solid state white lighting', Chemistry of Materials, vol. 24, no. 6, pp. 1198-1204. https://doi.org/10.1021/cm3000238
Birkel, Alexander ; Denault, Kristin A. ; George, Nathan C. ; Doll, Courtney E. ; Héry, Bathylle ; Mikhailovsky, Alexander A. ; Birkel, Christina S. ; Hong, Byung Chul ; Seshadri, Ram. / Rapid microwave preparation of highly efficient Ce 3+-substituted garnet phosphors for solid state white lighting. In: Chemistry of Materials. 2012 ; Vol. 24, No. 6. pp. 1198-1204.
@article{fec78f6a70624971858ae87e9b63ffa1,
title = "Rapid microwave preparation of highly efficient Ce 3+-substituted garnet phosphors for solid state white lighting",
abstract = "Ce 3+-substituted aluminum garnet compounds of yttrium (Y 3Al 5O 12) and lutetium (Lu 3Al 5O 12)-both important compounds in the generation of (In,Ga)N-based solid state white lighting-have been prepared using a simple microwave heating technique involving the use of a microwave susceptor to provide the initial heat source. Carbon used as the susceptor additionally creates a reducing atmosphere around the sample that helps stabilize the desired luminescent compound. High quality, phase-pure materials are prepared within a fraction of the time and using a fraction of the energy required in a conventional ceramic preparation; the microwave technique allows for a reduction of about 95{\%} in preparation time, making it possible to obtain phase pure, Ce 3+-substituted garnet compounds in under 20 min of reaction time. It is estimated that the overall reduction in energy compared with ceramic routes as practised in the lab is close to 99{\%}. Conventionally prepared material is compared with material prepared using microwave heating in terms of structure, morphology, and optical properties, including quantum yield and thermal quenching of luminescence. Finally, the microwave-prepared compounds have been incorporated into light-emitting diode {"}caps{"} to test their performance characteristics in a real device, in terms of their photon efficiency and color coordinates.",
author = "Alexander Birkel and Denault, {Kristin A.} and George, {Nathan C.} and Doll, {Courtney E.} and Bathylle H{\'e}ry and Mikhailovsky, {Alexander A.} and Birkel, {Christina S.} and Hong, {Byung Chul} and Ram Seshadri",
year = "2012",
month = "3",
day = "27",
doi = "10.1021/cm3000238",
language = "English (US)",
volume = "24",
pages = "1198--1204",
journal = "Chemistry of Materials",
issn = "0897-4756",
publisher = "American Chemical Society",
number = "6",

}

TY - JOUR

T1 - Rapid microwave preparation of highly efficient Ce 3+-substituted garnet phosphors for solid state white lighting

AU - Birkel, Alexander

AU - Denault, Kristin A.

AU - George, Nathan C.

AU - Doll, Courtney E.

AU - Héry, Bathylle

AU - Mikhailovsky, Alexander A.

AU - Birkel, Christina S.

AU - Hong, Byung Chul

AU - Seshadri, Ram

PY - 2012/3/27

Y1 - 2012/3/27

N2 - Ce 3+-substituted aluminum garnet compounds of yttrium (Y 3Al 5O 12) and lutetium (Lu 3Al 5O 12)-both important compounds in the generation of (In,Ga)N-based solid state white lighting-have been prepared using a simple microwave heating technique involving the use of a microwave susceptor to provide the initial heat source. Carbon used as the susceptor additionally creates a reducing atmosphere around the sample that helps stabilize the desired luminescent compound. High quality, phase-pure materials are prepared within a fraction of the time and using a fraction of the energy required in a conventional ceramic preparation; the microwave technique allows for a reduction of about 95% in preparation time, making it possible to obtain phase pure, Ce 3+-substituted garnet compounds in under 20 min of reaction time. It is estimated that the overall reduction in energy compared with ceramic routes as practised in the lab is close to 99%. Conventionally prepared material is compared with material prepared using microwave heating in terms of structure, morphology, and optical properties, including quantum yield and thermal quenching of luminescence. Finally, the microwave-prepared compounds have been incorporated into light-emitting diode "caps" to test their performance characteristics in a real device, in terms of their photon efficiency and color coordinates.

AB - Ce 3+-substituted aluminum garnet compounds of yttrium (Y 3Al 5O 12) and lutetium (Lu 3Al 5O 12)-both important compounds in the generation of (In,Ga)N-based solid state white lighting-have been prepared using a simple microwave heating technique involving the use of a microwave susceptor to provide the initial heat source. Carbon used as the susceptor additionally creates a reducing atmosphere around the sample that helps stabilize the desired luminescent compound. High quality, phase-pure materials are prepared within a fraction of the time and using a fraction of the energy required in a conventional ceramic preparation; the microwave technique allows for a reduction of about 95% in preparation time, making it possible to obtain phase pure, Ce 3+-substituted garnet compounds in under 20 min of reaction time. It is estimated that the overall reduction in energy compared with ceramic routes as practised in the lab is close to 99%. Conventionally prepared material is compared with material prepared using microwave heating in terms of structure, morphology, and optical properties, including quantum yield and thermal quenching of luminescence. Finally, the microwave-prepared compounds have been incorporated into light-emitting diode "caps" to test their performance characteristics in a real device, in terms of their photon efficiency and color coordinates.

UR - http://www.scopus.com/inward/record.url?scp=84859123281&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84859123281&partnerID=8YFLogxK

U2 - 10.1021/cm3000238

DO - 10.1021/cm3000238

M3 - Article

AN - SCOPUS:84859123281

VL - 24

SP - 1198

EP - 1204

JO - Chemistry of Materials

JF - Chemistry of Materials

SN - 0897-4756

IS - 6

ER -