| SrSi2O2N2∶Eu2+荧光粉的制备及性能研究 | |
| Preparation and Properties Characterization of SrSi2O2N2∶Eu2+ Phosphors | |
| 摘要: 以SrCO3，Si3N4，Eu2O3为原料，在N2气氛下，采用自还原高温固相法制备了SrSi2O2N2∶Eu2+荧光粉。研究了该荧光粉的物相结构、发光性能和晶体形貌，同时对比在不同气氛下合成的荧光粉。结果表明，在N2气氛与N2/H2气氛下分别合成的SrSi2O2N2∶Eu2+荧光粉物相结构和光谱特性基本一致。显示出合成了主晶相SrSi2O2N2，但还含有少量未知的中间项。Eu2+浓度的变化不影响激发状态，而发射光谱的波长在Eu2+浓度为1mol%~20mol%之间，从530 nm的绿光红移至550 nm的黄绿光区域。同时，激发光谱覆盖的范围宽，均能有效的被UV或蓝光激发，这意味着该类荧光粉在白光 LED方面有可能得到广泛的应用。 | |
| 关键词: SrSi2O2N2∶Eu2+ 荧光粉 发光性能 白光LED | |
| 基金项目: | |
| Abstract: Eu2+ doped SrSi2O2N2 phosphors were prepared by the auto-reduction solid-state reaction method using the SrCO3, Si3N4, and Eu2O3 as the starting materials under N2 atmosphere. The structural characterization, luminescence spectra and the crystal morphology of the synthesized phosphors were investigated. The phosphors synthesized under different atmosphere were also analyzed. The X-ray diffraction patterns of synthesized phosphors are indexed to the SrSi2O2N2 phase and an unknown intermediate phase. The shape and position of excitation band are not greatly influenced by the Eu2+ concentration. However, a systematic red shift of the emission band is observed as the Eu2+ concentration increase form 1mol% to 20mol%, resulting in a green-greenish yellow emission peaking from 530 to 550 nm. Meanwhile, this oxynitride phosphors have a broad excitation band extending form from ultraviolet to visible light rang, enabling them to be used for white light-emitting diodes (LED) when an ultraviolet or blue LED chip is combined. | |
| Keywords: SrSi2O2N2∶Eu2+ phosphors luminescence white LED | |
| 摘要点击次数: 1849 | |
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| 孟小康,谭 劲,雷 婷,张 玮,鄢 维,李聪明,孙夏微.SrSi2O2N2∶Eu2+荧光粉的制备及性能研究[J].无机化学学报,2012,28(5):893-897. | |
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