首页|新型双钙钛矿Ca2GdSbO6∶Sm3+橙红色荧光粉的制备及其发光性能

新型双钙钛矿Ca2GdSbO6∶Sm3+橙红色荧光粉的制备及其发光性能

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用高温固相法合成一种新型系列橙红色荧光粉Ca2Gd1-xSbO6∶xSm3+(x=0、0.01、0.02、0.03、0.04、0.05、0.06),使用X射线衍射(XRD)、扫描电子显微镜(SEM)、光致发光(PL)光谱、高温荧光光谱和荧光衰减寿命等手段表征其物相结构、晶体结构、化学纯度和光学性质,研究了材料的发光性能.结果表明,这种荧光粉基于Sm3+在 597 nm处的4G5/2→6H7/2跃迁,引入Sm3+作为发光中心在407 nm激发下可发出波长为597 nm的橙红光.随着Sm3+离子浓度的提高Ca2GdSbO6∶Sm3+荧光粉的发光强度先提高后降低.根据Dexter理论,其浓度猝灭是电偶极-电偶极相互作用主导的,Sm3+离子的最佳掺杂浓度为x=0.03.最佳掺杂样品的色纯度约为99.3％,色坐标为(0.6146,0.3826).在453K这种Ca2GdSbO6∶Sm3+荧光粉的发射强度只衰减5.56％,表明其具有较高的热稳定性.
Preparation and Luminescence Properties of a Novel Double Perovskite Ca2GdSbO6∶Sm3+Reddish-orange Phosphor
The compound Ca2GdSbO6 with a stable double perovskite structure is one of the high-quality materials used as a phosphor matrix.A new series of reddish-orange phosphors Ca2Gd1-xSbO6∶xSm3+(x=0、0.01、0.02、0.03、0.04、0.05、0.06)were synthesized by high-temperature solid-state method.The phase composition,optical properties,crystal structure and chemical purity of the prepared phos-phors were characterized via X-ray diffractometer(XRD),scanning electron microscope(SEM),photolu-minescence spectroscope(PL),high-temperature fluorescence spectroscope and fluorescence decay life-time measurement.The incorporation of Sm may endow the synthesized phosphor Ca2Gd1-xSbO6∶xSm3+with ions Sm3+as its luminescent centers with the peculiar 4G5/2→6H7/2 transition of Sm3+at 597 nm,so that the synthesized phosphor may emit the orange-red light at 597 nm under the excitation of the light at 407 nm.As the concentration of Sm3+ions increase,the luminous intensity of Ca2GdSbO6∶Sm3+phosphors in-creases first,and then decreases.According to Dexter's theory,the concentration quenching is dominat-ed by the electric dipole-dipole interaction,and the optimum doping of Sm3+ions is concentration x=0.03.The test shows that the color purity of the best-doped sample is about 99.3％,and the color coordi-nates are(0.6146,0.3826).The thermal stability was further studied,and it was found that the emission intensity was only attenuated by 5.56％at 453 K.The above results show that the new red-orange light-emitting Ca2GdSbO6∶Sm3+phosphor is promising to be applied in the field of white LED.

inorganic non-metallic materialsCa2GdSbO6∶Sm3+reddish-orange phosphorhigh-tem-perature solid-state methodwhite LEDhigh thermal stability

李婧、许英朝、范浩爽、陆逸、李莉、张贤玉

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厦门理工学院光电与通信工程学院 厦门 361024

厦门理工学院福建省光电技术与器件重点实验室 厦门 361024

无机非金属材料 Ca2GdSbC6∶Sm3+ 高温固相法 橙红色荧光粉 白光LED 高热稳定性

福建省高等学校产学研联合创新项目厦门市科技计划重大项目厦门理工学院研究生科技创新计划(2023)

2023H60383502ZCQ20191002YKJCX2023105

2024

10.11901/1005.3093.2023.309

材料研究学报
国家自然科学基金委员会 中国材料研究学会

材料研究学报

CSTPCD北大核心
影响因子：0.605
ISSN：1005-3093
年,卷(期)：2024.38(4)
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