| 非晶红色荧光粉Cd3Al2Si3O12∶Eu3+的制备及发光性能 |
| Photoluminescence Properties of Cd3Al2Si3O12∶Eu3+ Amorphous Powder for White Light-Emitting Diodes |
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| 摘要: 使用溶胶-凝胶法制备了Cd3Al2Si3O12∶Eu3+非晶体系红色荧光粉，并对其发光性质进行了研究。该荧光粉在Eu3+的位于394 nm的5L6能级和464 nm的5D2能级的激发下能够产生强的5D0→7F2的红光特征发光，最佳掺杂摩尔分数为25%。Cd3Al2Si3O12∶Eu3+荧光粉与传统的Y2O3∶Eu3+相比较，其发光强度是Y2O3∶Eu3+的2.4倍左右(在394和464 nm的激发下)。Cd3Al2Si3O12∶Eu3+的热稳定性好，比已经商业化的YAG∶Ce3+的热猝灭影响要小得多。所有这些结果表明Cd3Al2Si3O12∶Eu3+可作为暖白光LED用红色荧光粉。 |
| 关键词: 白光LED 铕 溶胶-凝胶法 发光 |
| 基金项目: |
| Abstract: A phosphor Eu3+ doped Cd3Al2Si3O12 was prepared by a convenient sol-gel method. Under excitation either into the 5L6 state with 394 nm or the 5D2 state with 464 nm, the phosphor gives a red emission at 610 nm originating from 5D0→7F2 transition of Eu3+. The red emission of Cd3Al2Si3O12∶Eu3+ is about 2.4 times stronger than that of Y2O3∶Eu3+. The low thermal quenching effect makes phosphor Cd3Al2Si3O12∶Eu3+ a promising candidate for the phosphor-converted white LEDs. |
| Keywords: white LED Eu3+ sol-gel method luminescence |
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| 丛 妍,李 斌,刘东平,杨 杞,牛金海.非晶红色荧光粉Cd3Al2Si3O12∶Eu3+的制备及发光性能[J].无机化学学报,2011,27(8):1503-1506. |
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