Mr. Zyad O. F. Mohammed Profile

Zyad O. F. Mohammed

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Proceedings Article | 14 March 2023 Presentation + Paper

Fast-acting halide-perovskite-based RGB fluorescent materials for aggregate Gb/s visible light communication

Yue Wang, Hong Wang, Omar Alkhazragi, Zyad O. Mohammed, Luis Gutiérrez-Arzaluz, Chun Hong Kang, Tien Khee Ng, Omar Mohammed, Boon Ooi

Proceedings Volume 12417, 124170D (2023) https://doi.org/10.1117/12.2647546

KEYWORDS: Thin films, Visible light communication, RGB color model, Perovskite, Nanosheets, Emission wavelengths, Fluorescent materials, Modulation, Transmission electron microscopy

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Three types of halide-perovskite-based fast-acting fluorescent materials have been demonstrated for high-speed visible light communication. All-inorganic metal-halide perovskite CsPbI₃ was utilized to generate red color at 685 nm, and twodimensional (2D) hybrid organic-inorganic halide perovskite nanosheets, (PEA)₂PbI₄ and (PEA)₂PbBr₄ (PEA= C₈H₉NH₃), with peak photoluminescence (PL) wavelengths of 525 nm and 408 nm, were respectively used for green- and blue-light emission. The materials were then embedded in the polymethyl methacrylate (PMMA) to improve their durability and flexibility in practical applications. Pumped by a 405-nm violet laser, the red and green phosphors exhibit –3-dB modulation bandwidths of 14 MHz and 193 MHz, respectively. For the blue phosphor, a 124-MHz –3-dB bandwidth was obtained by using a 375-nm UVA laser diode. Benefitting from either the short PL lifetime or high PL quantum yield, aggregate Gb/s data transmission was achieved in the communication link. Direct current biased optical orthogonal frequency-division multiplexing (DCO-OFDM) modulation scheme was implemented with an adaptive quadrature amplitude modulation (QAM) signal. The transmission net data rates of RGB phosphors are 0.51 Gb/s, 0.93 Gb/s, and 0.43 Gb/s, respectively. The corresponding average bit error ratios are 3.5×10^-3, 3.6×10^-3, and 3.6×10^-3, which are below the 7%-overhead forward error correction (FEC) criterion. Taking advantage of the tunability of the halide perovskite materials covering the whole visible range could further fulfill high-speed color-pure wavelength-division multiplexing by using a single source with multiple luminescent materials emitting light at different wavelengths. Besides, combining luminescent materials with specific colors, simultaneous white-light illumination, and high-speed communication can also be realized.

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