Engineering cation vacancies to improve the luminescence properties of Ca14Al10Zn6O35: Mn4+ phosphors for LED plant lamp
Engineering cation vacancies to improve the luminescence properties of Ca14Al10Zn6O35: Mn4+ phosphors for LED plant lamp
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工程阳离子空位提高LED植物灯用Ca14Al10Zn6O35:Mn4荧光粉的发光性能
DOI：
10.1111/jace.16874
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发表时间：
2020
影响因子：
3.9
通讯作者：
Zhi Zhou
中科院分区：
文献类型：
--
作者：
Nan Zhou;Longhai Liu;Zhipeng Zhou;Ye Zhang;Minghui Li;Cheng Zhou;Mao Xia;Zhi Zhou
近年来，用于室内植物栽培的掺锰荧光粉因其远红外发射与植物色素的吸收光谱匹配良好而受到广泛关注。然而，许多Mn 4+掺杂的磷光体仍然面临一些挑战，例如低的光效率和低的热稳定性。利用阳离子空位工程是解决这些问题的有效途径。本文采用燃烧法成功合成了.Ca14 − xAl 10 Zn 6 − yO 35：Mn 4+荧光粉。Ca 14 − xAl 10 Zn 6 − yO 35：Mn 4+荧光粉的发光强度是通过电荷补偿机制来设计Ca 2+和Zn 2+空位而得到增强的。Ca ~（2+）和Zn ~（2+）空位的最佳含量均为0.3。equal.to此外，缺陷的形成伴随着晶格畸变，这在驱动激发的声子陷阱以降低能量方面起着至关重要的作用。loss.by因此，Ca 14 − xAl 10 Zn 6 − yO 35：.Mn4+磷光体的热稳定性也通过工程化阳离子空位而得到改善。此外，. Ca 14 − xAl 10 Zn 6 − yO 35：Mn 4+荧光粉可以被蓝光有效激发，并且由于Mn 4+自旋禁戒2 E → 4A 2跃迁而显示出远红光发射。结果表明，Ca 14 − xAl 10 Zn 6 − yO 35：Mn 4+荧光粉在室内植物栽培中具有巨大的应用潜力。
In the recent years, Mn4+‐doped phosphors for indoor plant cultivation have received.extensive concern owing to the far‐red emission that can match well with the absorption.spectra of plant pigments. Whereas, many Mn4+‐doped phosphors still face.some challenges such as poor light efficiency and low thermal stability. It is an effective.way to resolve these problems via cation vacancies engineering. Herein, the.Ca14−xAl10Zn6−yO35: Mn4+ phosphors are successfully synthesized by combustion.method. The luminescence intensity of Ca14−xAl10Zn6−yO35: Mn4+ phosphor is enhanced.through engineering Ca2+ and Zn2+ vacancies according to the charge compensation.mechanism. The optimal content of each Ca2+ and Zn2+ vacancy is equal.to be 0.3. Furthermore, the defect formation is accompanied with lattice distortion,.which plays a vital role in driving the excited phonon traps to reduce the energy loss.by non‐radiation transitions. Therefore, the thermal stability of Ca14−xAl10Zn6−yO35:.Mn4+ phosphor is also improved via engineering cation vacancies. In addition, the.Ca14−xAl10Zn6−yO35: Mn4+ phosphors can be effectively excited by blue light and it.exhibits far‐red emission due to the Mn4+ spin‐forbidden 2E → 4A2 transition. The.results suggest that the Ca14−xAl10Zn6−yO35: Mn4+ phosphors can have a tremendous.potential in indoor plant cultivation.