In this Letter, the CH₃NH₃PbBr₃ nanocrystals (NCs) are embedded into the interstices of the fluorine (polyvinyl fluoride/polyvinylidene fluoride, PVF/PVDF) matrix on polyethylene terephthalate (PET) substrate to introduce new advantages, such as being flexible and waterproof, while maintaining the high optical performance of perovskites. The sample’s photoluminescence (PL) spectra under 325 nm laser is a green emission peaked at 537 nm with full width at half maximum (FWHM) of about 21.2 nm and a fast PL decay time. As a color converter, it shows high optical absorption and can transform light from solar-blind ultraviolet to a blue region into a green region in air, water, and bending conditions. While excited by a 270 nm ultraviolet light-emitting diode (LED), the system’s observed −3 dB bandwidth with the color converter is near 4.4 MHz in air and water conditions with well-eye diagrams at a data rate of 30 Mbps. Finally, we demonstrate an audio transmission application with an ultraviolet light source, a color conversion layer, and a low-cost silicon-based photodetector.

中文翻译：

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使用灵活防水的钙钛矿颜色转换器进行光无线通信

在这封信中，CH ₃ NH ₃ PbBr ₃纳米晶体（NC）被嵌入到聚对苯二甲酸乙二醇酯（PET）基底上的氟（聚氟乙烯/聚偏二氟乙烯，PVF/PVDF）基质的间隙中，从而引入了新的优点，例如柔韧防水，同时保持钙钛矿的高光学性能。样品在 325 nm 激光下的光致发光 (PL) 光谱为绿色发射，峰值为 537 nm，半峰全宽 (FWHM) 约为 21.2 nm，PL 衰减时间较快。作为颜色转换器，它表现出高光吸收性，可以在空气、水和弯曲条件下将日盲紫外线从蓝色区域转换为绿色区域。当受到 270 nm 紫外发光二极管 (LED) 激发时，系统通过颜色转换器观察到的 −3 dB 带宽在空气和水条件下接近 4.4 MHz，井眼图数据速率为 30 Mbps。最后，我们演示了带有紫外光源、颜色转换层和低成本硅基光电探测器的音频传输应用。