Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 119, Issue 43, Pages 24558-24563Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.5b07566
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Funding
- National Natural Science Foundation of China [NSFC11404351, 51202051]
- Ningbo Municipal Natural Science Foundation [2014A610122]
- Ningbo Science and Technology Innovation Team [2014B82004]
- China Postdoctoral Science Foundation [2014M560497, 2015T80638]
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A new red-emitting phosphor, Ce3+-Mn2+ codoped Ba9Lu2Si6O24 was synthesized by using solid-state reactions. The phase formation, luminescence properties, energy transfer mechanisms, and thermal stabilities were investigated. Under the near-ultraviolet excitation, Ba9Lu2Si6O24:Ce3+,xMn(2+) shows a tunable emission from blue-violet to red. When x = 0.08, the photoluminescence characterized a major peak at 610 nm with an internal quantum efficiency of about 70%. The energy transfer from Ce3+ to Mn2+ was further enhanced by self-charge compensation as a result of the presence of activators at different crystallographic sites simultaneously. At 160 degrees C, the quantum efficiency retained 84% of that measured at room temperature. The small thermal quenching and efficient luminescence suggest that Ba9Lu2Si6O24:Ce3+,Mn2+ is a promising candidate for use in ultraviolet chip pumped light-emitting diodes (LEDs).
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