Temporal and Remote Tuning of Piezophotonic‐Effect‐Induced Luminescence and Color Gamut via Modulating Magnetic Field,Advanced Materials

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Temporal and Remote Tuning of Piezophotonic‐Effect‐Induced Luminescence and Color Gamut via Modulating Magnetic Field
Advanced Materials ( IF 27.4 ) Pub Date : 2017-09-18 , DOI: 10.1002/adma.201701945
Man-Chung Wong _{1,

2} , Li Chen _{1,

2} , Gongxun Bai _{1,

2} , Long-Biao Huang _{1,

2} , Jianhua Hao _{1,

2}

Affiliation

Light‐emitting materials have been extensively investigated because of their widespread applications in solid‐state lighting, displays, sensors, and bioimaging. In these applications, it is highly desirable to achieve tunable luminescence in terms of luminescent intensity and wavelength. Here, a convenient physical approach of temporal and remote tuning of light‐emitting wavelength and color is demonstrated, which is greatly different from conventional methods. It is shown that by modulating the frequency of magnetic‐field excitation at room temperature, luminescence from the flexible composites of ZnS:Al, Cu phosphors induced by the piezophotonic effect can be tuned in real time and in situ. The mechanistic investigation suggests that the observed tunable piezophotonic emission is ascribed to the tilting band structure of the ZnS phosphor induced by magnetostrictive strain under a high frequency of magnetic‐field excitation. Furthermore, some proof‐of concept devices, including red–green–blue full‐color displays and tunable white‐light sources are demonstrated simply by frequency modulation. A new understanding of the fundamentals of both luminescence and magnetic–optics coupling is thus provided, while offering opportunities in magnetic–optical sensing, piezophotonics, energy harvesting, novel light sources, and displays.

中文翻译：

通过调制磁场对压电光子效应诱导的发光和色域进行时间和远程调谐

由于发光材料在固态照明，显示器，传感器和生物成像中的广泛应用，因此已进行了广泛的研究。在这些应用中，非常需要在发光强度和波长方面实现可调的发光。这里，展示了一种方便的物理方法，可以对发光波长和颜色进行时间和远程调整，这与传统方法大不相同。结果表明，通过调节室温下的磁场激发频率，可以实时，现场地调节由ZnS：Al，压电光子效应引起的Cu磷光体的发光。机理研究表明，在高频磁场激励下，磁致伸缩应变引起的ZnS荧光粉的倾斜带结构归因于观察到的可调压电光子发射。此外，一些概念验证设备，包括红，绿，蓝全彩显示器和可调白光源，仅通过调频进行演示。这样就提供了对发光和磁光耦合的基本原理的新理解，同时为磁光感测，压电光子学，能量收集，新颖的光源和显示器提供了机会。包括红，绿，蓝全彩显示器和可调白光源的演示仅通过调频即可完成。这样就提供了对发光和磁光耦合的基本原理的新理解，同时为磁光感测，压电光子学，能量收集，新颖的光源和显示器提供了机会。包括红，绿，蓝全彩显示器和可调白光源的演示仅通过调频即可完成。这样就提供了对发光和磁光耦合的基本原理的新理解，同时为磁光感测，压电光子学，能量收集，新型光源和显示器提供了机会。

更新日期：2017-09-18

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