Finding a novel highly efficient Mn4+-activated Ca3La2W2O12 far-red emitting phosphor with excellent responsiveness to phytochrome PFR: Towards indoor plant cultivation application
Finding a novel highly efficient Mn4+-activated Ca3La2W2O12 far-red emitting phosphor with excellent responsiveness to phytochrome PFR: Towards indoor plant cultivation application
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寻找一种新型高效Mn4激活Ca3La2W2O12远红光荧光粉，对光敏色素PFR具有优异的响应性：面向室内植物栽培应用
DOI：
10.1016/j.dyepig.2018.01.022
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发表时间：
2018-05-01
影响因子：
4.5
通讯作者：
Guo, Heng
中科院分区：
文献类型：
--
作者：
Huang, Xiaoyong;Guo, Heng
采用高温固相反应法制备了新型Mn4+激活的Ca3La2W2O12(CLW)远红光荧光粉。用粉末X射线衍射仪(XRD)、场发射扫描电子显微镜(FE-SEM)、光致发光(PL)、衰减寿命、随温度变化的发射光谱和内量子效率(IQE)对样品进行了表征。在近紫外光(360 Nm)或蓝光(469 Nm)激发下，ClW：Mn4+荧光粉在300-600 nm范围内表现出很强的宽激发带，并在650-800 nm之间产生了711 nm处的强远红发射峰。CIE色度坐标和半高全宽分别为(0.7125，0.2858)和39 nm。Mn4+的最佳掺杂浓度约为0.8mol%，其浓度猝灭机制为偶极-偶极相互作用。重要的是，CLW：0.8%的Mn4+样品具有高达47.9%的智商。最后，将365 nm紫外光发射LED芯片与CLW：0.8%Mn4+远红光发射材料相结合，制成了LED器件。由于在近紫外光到蓝光的激发下，ClW：Mn4+的发射光谱与光敏色素P-FR的吸收光谱很好地匹配，因此ClW：Mn4+在室内植物栽培中具有潜在的应用前景。
Novel Mn4+-activated Ca3La2W2O12 (CLW) phosphors with far-red emission were successfully synthesized by a high-temperature solid-state reaction method. The obtained samples were characterized by powder X-ray diffraction (XRD), field-emission scanning electron microscope (FE-SEM), photoluminescence (PL), decay lifetimes, temperature-dependent emission and internal quantum efficiency (IQE). The CLW:Mn4+ phosphors exhibited an intense broad excitation band in the range of 300-600 nm and gave rise to a strong far-red emission peaking at 711 nm between 650 and 800 tun under near-ultraviolet light (360 nm) or blue light (469 nm) excitation. The CIE chromaticity coordinates and full-width at half-maximum (FWHM) are (0.7125, 0.2858) and 39 nm, respectively. The optimal doping concentration of Mn4+ was about 0.8 mol%, and the concentration quenching mechanism was found to be a dipole-dipole interaction for the Mn4+ activators. Importantly, the CLW:0.8% Mn4+ sample had high IQE of as high as 47.9%. Finally, a LED device was fabricated using a 365 nm ultraviolet emitting LED chip combined with the far-red emitting CLW:0,8%Mn4+ phosphors. Since the emission band of CLW:Mn4+ matched well with the absorption band of phytochrome P-FR under the excitation of light in near ultraviolet to blue, thus the CLW:Mn4+ phosphors have potential application in the indoor plant cultivation.