Charge compensation-assisted photoluminescence in an efficient K2SrP4O12:Sm3+ phosphor
Benefiting from the visible light emission behavior of the Sm3+ activator, Sm3+-incorporated inorganic phosphors have received considerable interest in solid-state lighting areas. Nevertheless, so far, highly efficient and heat-resistant optical materials activated with Sm3+ are scarce. In this work...
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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-01-01
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| Series: | Next Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949822825000231 |
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| Summary: | Benefiting from the visible light emission behavior of the Sm3+ activator, Sm3+-incorporated inorganic phosphors have received considerable interest in solid-state lighting areas. Nevertheless, so far, highly efficient and heat-resistant optical materials activated with Sm3+ are scarce. In this work, a series of new orange-red-emitting phosphors K2SrP4O12 (KSPO):Sm3+,A+ (A+ = Li, Na, and K) were prepared by charge compensation strategy. Under 405 nm excitation, the phosphors exhibit strong orange-red emission. The incorporation of alkali metals A+ effectively compensates for the vacancy defects caused by the non-equivalent substitution of Sm3+ for Sr2+, improving the luminescent performance. In particular, the Na+-compensated phosphor exhibits a luminescence intensity 1.92 times greater than that of the uncompensated sample due to the fact that Na+ and Sr2+ have close ionic radii. It has demonstrated excellent internal quantum efficiency (37.1 %), high color purity (98.5 %), and high thermostability (94 %@423 K), significantly surpassing the majority of reported Sm3+-doped phosphors. In addition, a representative KSPO:0.03Sm3+,0.03Na+ phosphor is used to prepare W-LEDs, showing potential for solid-state lighting. |
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| ISSN: | 2949-8228 |