Faster LED phosphors to boost Li-Fi data rates
By mixing solution-processed CsPbBr3 perovskite nanocrystals (NCs) with a conventional red phosphor, they obtained what they describe as a CsPbBr3 NC phosphor-based white light converter with a modulation bandwidth of 491MHz, which could support high data rate up to 2 Gbit/s, much faster than Wi-Fi.
This would brake today’s VLC bottleneck when using white LEDs, poor phosphor modulation capability due to intrinsically “long” phosphorescence lifetimes.
What’s more, as well as exhibiting a shorter excited lifetime, the red phosphor and perovskite composite material yields a white light with a high colour rendering index of 89 and a correlated colour temperature of 3236 K, which makes the white LED suitable for comfort lighting applications.
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