Reduction of Mn4+ to Mn2+ in CaAl12O19 by co-doping charge compensators to obtain tunable photoluminescence

Green and red photoluminescence (PL) is obtained from manganese activated phosphor CaAl₁₂O₁₉ (CAO) synthesized using a solid-state reaction method. The red PL is attributed to Mn⁴⁺ at an octahedral Al³⁺ site and the green PL is from Mn²⁺ at a tetrahedral Al³⁺ site. Thermal reduction of Mn⁴⁺ to Mn²⁺...

Full description

Saved in:
Bibliographic Details
Published inRSC advances Vol. 3; no. 14; pp. 4510 - 4513
Main Authors Lu, Jing, Pan, Yuexiao, Wang, Jiaguo, Chen, Xi'an, Huang, Shaoming, Liu, Guokui
Format Journal Article
LanguageEnglish
Published 01.01.2013
Subjects
aluminum
bismuth
calcium
chemical reduction
ions
lanthanum
manganese
photoluminescence
Online AccessGet full text
ISSN2046-2069
2046-2069
DOI10.1039/c3ra22938f

Cover

More Information
Summary:Green and red photoluminescence (PL) is obtained from manganese activated phosphor CaAl₁₂O₁₉ (CAO) synthesized using a solid-state reaction method. The red PL is attributed to Mn⁴⁺ at an octahedral Al³⁺ site and the green PL is from Mn²⁺ at a tetrahedral Al³⁺ site. Thermal reduction of Mn⁴⁺ to Mn²⁺ in CAO lattice does not complete, even in a reducing atmosphere, but can be fully realized through co-doping of trivalent ions such as Bi³⁺ and La³⁺ with ion radii similar to that of Ca²⁺. The intensity of the Mn²⁺ green luminescence strongly depends on the co-doping concentration of the trivalent ions.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:2046-2069
2046-2069
DOI:10.1039/c3ra22938f