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http://hdl.handle.net/10397/95879
Title: | Temporal and remote tuning of piezophotonic-effect-induced luminescence and color gamut via modulating magnetic field | Authors: | Wong, MC Chen, L Bai, G Huang, LB Hao, J |
Issue Date: | 20-Nov-2017 | Source: | Advanced materials, 20 Nov. 2017, v. 29, no. 43, 1701945 | Abstract: | 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. | Keywords: | Magnetic sensors Mechanoluminescence Metal-ion doped phosphors Piezophotonic effect RGB color |
Publisher: | Wiley-VCH | Journal: | Advanced materials | ISSN: | 0935-9648 | EISSN: | 1521-4095 | DOI: | 10.1002/adma.201701945 | Rights: | © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim This is the peer reviewed version of the following article: Wong, M. C., Chen, L., Bai, G., Huang, L. B., & Hao, J. (2017). Temporal and remote tuning of piezophotonic‐effect‐induced luminescence and color gamut via modulating magnetic field. Advanced Materials, 29(43), 1701945, which has been published in final form at https://doi.org/10.1002/adma.201701945. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. |
Appears in Collections: | Journal/Magazine Article |
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Bai_Temporal_Remote_Tuning.pdf | Pre-Published version | 1.11 MB | Adobe PDF | View/Open |
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