首页|植物生长照明用La2Mg4/3Sb2/3O6∶Mn4+红色荧光粉的制备及光谱特性

植物生长照明用La2Mg4/3Sb2/3O6∶Mn4+红色荧光粉的制备及光谱特性

扫码查看
原文链接
  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
采用传统高温固相法制备了一系列La2Mg4/3Sb2/3-xO6∶xMn4+红色荧光粉,并对其结构、形貌和光谱特性进行了研究.研究结果表明:La2Mg4/3Sb2/3O6与La2Mg4/3Nb2/3O6具有相同的双钙钛矿结构,Mn4+掺杂对荧光粉的结构没有影响.La2Mg4/3Sb2/3-xO6∶xMn4+荧光粉在360与510 nm处有两个较宽的激发峰,分别对应Mn4+的4A2g→2T2g与4A2g→4T2g跃迁.在360 nm激发下,La2Mg4/3Sb2/3-xO6∶xMn4+荧光粉在710 nm处呈现出较强的红光发射峰,对应Mn4+的2Eg→4A2g跃迁发射.Mn4+在La2Mg4/3Sb2/3O6基质中的最佳掺杂浓度为0.004,此时的量子效率高达89.6％,色纯度为99％.根据激发光谱和发射光谱分析了 Mn4+在La2Mg4/3Sb2/3O6基质中的晶体场强,并计算了晶体场参数Dq、B和C.结合Mn4+的位型坐标图分析了 La2Mg4/3Sb2/3-xO6∶xMn4+荧光粉的温度猝灭过程,计算得到其激活能为0.355 eV.最后,对比了La2Mg4/3Sb2/3-xO6∶xMn4+荧光粉的发射光谱与植物光敏色素红外吸收型(PR)、远红外吸收型(PFR)的吸收光谱,并初步评估了其在LED植物照明领域的应用前景.
Preparation and Spectral Properties of La2Mg4/3Sb2/3O6∶Mn4+Red Phosphor for Plant Growth Illumination
A series of La2Mg4/3Sb2/3-xO6∶xMn4+red phosphors were prepared via traditional high-temperature solid-reaction method,and their structure,morphology and spectral properties were investigated.The results show that La2Mg4/3Sb2/3O6 belongs to the double-perovskite structure as La2Mg4/3Nb2/3O6 does,and the incorporation of Mn4+has no influence on the structure of the phosphors.La2Mg4/3Sb2/3-xO6∶xMn4+phosphor exhibits two broad excitation bands at 360 and 510 nm,corresponding to the 4A2g→2T2g and 4A2g→4T2g transitions of Mn4+respectively.Upon 360 nm excitation,La2Mg4/3Sb2/3-xO6∶xMn4+phosphor gives rise to a intense red emission band at 710 nm,which belongs to the 2Eg→4A2g transition of Mn4+.The optimal concentration of Mn4+in La2Mg4/3Sb2/3O6 host was determined to be 0.004,with quantum yield and color purity up to 89.6％and 99％,respectively.A crystal field analysis for Mn4+in the La2Mg4/3Sb2/3O6 matrix was conducted based on the excitation and emission spectra,and the crystal field parameters Dq,B and C were calculated.The temperature quenching process of La2Mg4/3Sb2/3-xO6∶xMn4+phosphor was analyzed with the configurational coordinate diagram of Mn4+,and the activation energy was calculated to be 0.355 eV.Finally,a comparison between the emission spectra of La2Mg4/3Sb2/3-xO6∶xMn4+phosphor and the absorption spectra of phytochrome PR and PFR was provided,and the application prospect of La2Mg4/3Sb2/3-xO6∶xMn4+phosphor in LED plant illumination was preliminarily evaluated.

plant growth illuminationred phosphordouble-perovskiteLa2Mg4/3Sb2/3-xO6∶xMn4+spectral propertyMn4+dopingthermal stability

宋明君、于殿臣、王晶、周薇薇、赵旺

展开 >

潍坊学院化学化工与环境工程学院,潍坊 261061

潍坊市科技创新促进中心,潍坊 261061

淮南师范学院电子工程学院,淮南 232038

植物生长照明 红色荧光粉 双钙钛矿 La2Mg4/3Sb2/3-xO6∶xMn4+ 光谱特性 Mn4+掺杂 热稳定性

安徽省高校杰出青年科研项目安徽省自然科学基金潍坊市科技发展计划项目

2022AH0200872108085MB532023GX011

2024

人工晶体学报
中材人工晶体研究院

人工晶体学报

CSTPCD北大核心
影响因子：0.554
ISSN：1000-985X
年,卷(期)：2024.53(10)