Pressure-induced two-color photoluminescence in MnF(2) at room temperature.
A novel two-color photoluminescence (PL) is found in MnF(2) at room temperature under high pressure. Contrary to low-temperature PL, PL at room temperature is unusual in transition-metal concentrated materials like MnF(2), since the deexcitation process at room temperature is fully governed by energy transfer to nonradiative centers. We show that room-temperature PL in MnF(2) originates from two distinct Mn(2+) emissions in the high-pressure cotunnite phase. The electronic structure and the excited-state dynamics are investigated by time-resolved emission and excitation spectroscopy at high pressure.
Hernández
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I
DCITIMAC, Facultad de Ciencias, University of Cantabria, 39005 Santander, Spain.
Rodríguez
Fernando
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Hochheimer
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HD