白光LED用硅酸盐基质发光粉的制备及其封装特性

桑石云; 王细凤; 夏 威; 温嘉琪; 林广旭; 朝克夫; 肖志国

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白光LED用硅酸盐基质发光粉的制备及其封装特性

论文 | 更新时间：2020-08-12

- 白光LED用硅酸盐基质发光粉的制备及其封装特性
- Preparation and Encapsulation Characteristics of Silicate-based Phosphor for White-light-emitting LED
- 发光学报 2009年30卷第4期页码：503-508
- 作者机构：
  
  大连路明发光科技股份有限公司,辽宁大连,116025
- 作者简介：
- 基金信息：
- DOI：
  中图分类号： TN312.8;O482.31
- 收稿日期：2009-01-25，
  
  修回日期：1900-01-02，
  
  网络出版日期：2009-08-30，
  
  纸质出版日期：2009-08-30
- 稿件说明：
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桑石云, 王细凤, 夏威, 等. 白光LED用硅酸盐基质发光粉的制备及其封装特性[J]. 发光学报, 2009,30(4):503-508.

SANG Shi-yun, WANG Xi-feng, XIA Wei, et al. Preparation and Encapsulation Characteristics of Silicate-based Phosphor for White-light-emitting LED[J]. Chinese journal of luminescence, 2009, 30(4): 503-508.
桑石云, 王细凤, 夏威, 等. 白光LED用硅酸盐基质发光粉的制备及其封装特性[J]. 发光学报, 2009,30(4):503-508. DOI：

SANG Shi-yun, WANG Xi-feng, XIA Wei, et al. Preparation and Encapsulation Characteristics of Silicate-based Phosphor for White-light-emitting LED[J]. Chinese journal of luminescence, 2009, 30(4): 503-508. DOI：

摘要

在还原气氛下采用高温固相法合成了Eu

激活的硅酸盐基质白光LED用发光粉

运用扫描电子显微镜和荧光分光光度计分别对发光粉的形貌和激发、发射光谱进行了表征

并对其与YAG发光粉的封装特性进行了对比研究。结果表明

合成的硅酸盐基质白光LED用发光粉其激发光谱覆盖范围宽。采用不同波段的LED芯片进行封装时

和YAG发光粉相比

其色坐标、显色指数和流明效率波动不大

尤其是流明效率波动仅在8%左右

而且其老化性能也和YAG发光粉差别不大。对其和YAG LED的相对发射光谱研究表明

硅酸盐更适合暖白光LED的封装

硅酸盐发光粉粒径与封装流明效率规律变化的研究结果表明

较大粒径的硅酸盐发光粉有可能在大功率LED上有潜在的应用前景。

Abstract

Considering the growing importance of energy saving and environmental friendliness

solid-state lighting is emerging as a highly competent field and a possible alternative to existing lighting technologies. Recently

a blue LED combining with a yellow emitting YAG ∶ Ce phosphor was used mostly to make white-lighting LED

however

as the high synthesis temperature of YAG phosphor

poor color quality due to the serious scarcity of red light

a novel phosphor is rather needed. An Eu-activated silicate-based phosphor for WLED was prepared by solid-state reaction (SSR) under reductive atmosphere. The morphology of the phosphor powder was observed by means of scanning electronic microscope. The excitation and emission spectra were measured by F-4500 spectrometer using a Xe-lamp as an excitation source. And the encapsulation cha-racteristics of silicate-based phosphor were comparatively studied with that of YAG phosphor. The results showed that the as-synthesized silicate-based phosphor has homogenous particle size of about 15 μm and broad excitation band. When the as-synthesized phosphor and YAG were encapsulated to blue LED chips with diffe-rent emission wavelength

the chromaticity coordinate

color-rendering index and luminous efficiency fluctuated a little; especially the luminous efficiency only fluctuated about 5% in comparison with YAG. However

when YAG phosphor was encapsulated to blue LED chip with emission wavelength longer than 462.5 nm

its luminous efficiency decrease remarkably due to its narrow excitation spectra. The comparison results of relative emission spectra of silicate and YAG LED indicated silicate phosphor is more suitable for the encapsulation of warm white LED than YAG phosphor. And the results of particle size showed silicate phosphor have potential application for high power LED. The aging performance of silicate phosphor is better than that of YAG phosphor. In conclusion

the as-synthesized silicate-based phosphor is a novel phosphor for white LED

having a broad excitation band and excellent chemistry performance

especially well matched with blue-light-emitting LED chips with different emission wavelengths.

关键词

Keywords

references

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