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Optical wireless communication using a flexible and waterproof perovskite color converter

Feifei Qin, Feng Chen, Yue Cao, Linning Wang, Chengwei Wang, Yanan Liao, Yuhang Dai, Junfeng Lu, Xinru Lan, Xu Wang, XianWu Tang, Xiaoyan Liu, Gangyi Zhu, and Yongjin Wang

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Abstract

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.

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Supplementary Material (2)

NameDescription
Supplement 1       Supplementary Material shows IQY of the perovskite film, transmittance curve of the composite film, PL decay time properties of samples under 405 nm laser, EL details for the ultraviolet LED with or without perovskite film, the stability of optical w
Visualization 1       Visualization 1 indicates the working process of the audio transmission system. To further demonstrate the optical communication properties of the samples, the perovskite film was introduced to an audio signal transmission system with ultraviolet LE

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Data may be obtained from the authors upon reasonable request.

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