Thermal quenching of Mn4+ luminescence in Sn4+-containing garnet hosts
Source abstract
Abstract
Abstract A series of Mn4+-doped multi-component garnet ceramics comprising Sn4+ ions at octahedral sites, namely Ca3SnScGaSi2O12, Ca2YSnMgAlSi2O12, Ca2YSnGaGa2SiO12 and Ca2YSn2Ga3O12, were synthesized and investigated as red emitting phosphors for warm white pc-LEDs. It turned out that all synthesized phosphors exhibit rather poor thermal stability of the Mn4+ luminescence which is almost completely quenched at room temperature. The low thermal quenching temperature of Mn4+ luminescence for these phosphors is related to the low energy of the Mn4+ 4T2 and O2− - Mn4+ charge transfer states which can serve as quenchers for Mn4+ luminescence. It is proposed that a higher thermal stability of Mn4+ luminescence can be expected for compounds in which Mn4+ ions substitute for host cations having a lower charge and/or smaller size than Mn4+.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Glass properties and applications · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (19)
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