TY - JOUR
T1 - Photoluminescence properties of layered perovskite-type strontium scandium oxyfluoride activated with Mn4+
AU - Kato, Hideki
AU - Takeda, Yohei
AU - Kobayashi, Makoto
AU - Kobayashi, Hisayoshi
AU - Kakihana, Masato
N1 - Publisher Copyright:
© 2018 Kato, Takeda, Kobayashi, Kobayashi and Kakihana.
PY - 2018/9/1
Y1 - 2018/9/1
N2 - In this research, we have found that layered perovskite titanate Sr2TiO4 doped with Mn4+ exhibits photoluminescence even at room temperature despite no luminescence from Mn4+-doped SrTiO3 with a three-dimensional bulky perovskite structure. The relative position of t2g orbital of Mn to the valence band is a key factor for appearance of Mn4+-emission in Sr2TiO4:Mn. This result suggested usefulness of layered perovskite-type materials as hosts for Mn4+-activated phosphors than the bulky perovskite-type materials. Our investigation into photoluminescence of Mn4+-doped layered perovskite compounds has revealed that strontium scandium oxyfluoride Sr2ScO3F activated with Mn4+ exhibits Mn4+-emission with a peak at 697 nm under excitation at 300-600 nm and its emission intensity is much stronger than that of Sr2TiO4:Mn. The internal and external quantum yields of Sr2ScO3F:Mn were determined to be 50.5 and 43.5% under excitation at 345 nm, respectively.
AB - In this research, we have found that layered perovskite titanate Sr2TiO4 doped with Mn4+ exhibits photoluminescence even at room temperature despite no luminescence from Mn4+-doped SrTiO3 with a three-dimensional bulky perovskite structure. The relative position of t2g orbital of Mn to the valence band is a key factor for appearance of Mn4+-emission in Sr2TiO4:Mn. This result suggested usefulness of layered perovskite-type materials as hosts for Mn4+-activated phosphors than the bulky perovskite-type materials. Our investigation into photoluminescence of Mn4+-doped layered perovskite compounds has revealed that strontium scandium oxyfluoride Sr2ScO3F activated with Mn4+ exhibits Mn4+-emission with a peak at 697 nm under excitation at 300-600 nm and its emission intensity is much stronger than that of Sr2TiO4:Mn. The internal and external quantum yields of Sr2ScO3F:Mn were determined to be 50.5 and 43.5% under excitation at 345 nm, respectively.
KW - Layered perovskite
KW - Photoluminescence
KW - Red emission
KW - Scandium oxyfluoride
KW - Tetravalent manganese
UR - http://www.scopus.com/inward/record.url?scp=85054732063&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85054732063&partnerID=8YFLogxK
U2 - 10.3389/fchem.2018.00467
DO - 10.3389/fchem.2018.00467
M3 - Article
AN - SCOPUS:85054732063
VL - 6
JO - Frontiers in Chemistry
JF - Frontiers in Chemistry
SN - 2296-2646
IS - SEP
M1 - 467
ER -