Perovskite Nanocrystals as a Color Converter for Visible Light Communication

Abstract

Visible light communication (VLC) is an emerging technology that uses light-emitting diodes (LEDs) or laser diodes for simultaneous illumination and data communication. This technology is envisioned to be a major part of the solution to the current bottlenecks in data and wireless communication. However, the conventional lighting phosphors that are typically integrated with LEDs have limited modulation bandwidth and thus cannot provide the bandwidth required to realize the potential of VLC. In this work, we present a promising light converter for VLC by designing solution-processed CsPbBr 3 perovskite nanocrystals (NCs) with a conventional red phosphor. The fabricated CsPbBr 3 NC phosphor-based white light converter exhibits an unprecedented modulation bandwidth of 491 MHz, which is ∼40 times greater than that of conventional phosphors, and the capability to transmit a high data rate of up to 2 Gbit/s. Moreover, this perovskiteenhanced white light source combines ultrafast response characteristics with a high color rendering index of 89 and a correlated color temperature of 3236 K, thereby enabling dual VLC and solid-state lighting functionalities.

Fully‐Inorganic Trihalide Perovskite Nanocrystals: A New Research Frontier of Optoelectronic Materials

“…[42]). Apparently, the aforementioned superior optical www.advmat.de www.advancedsciencenews.com merits provide solid foundation for optoelectronic applications in light harvester, [43][44][45][46] LEDs, [33,34,[47][48][49][50][51][52][53][54][55][56] high-definition displays, [33,48] low-threshold lasers, [40,[57][58][59][60] and photodetectors. [33] In spite of the superiority to metal chalcogenide QDs, the main shortcoming of all-inorganic perovskite NCs is the degradation under service environment (see details in section 5).…”

Energy harvesting and conversion mechanisms for intrinsic upconverted mechano-persistent luminescence in CaZnOS

“…44 However, as commented by Chemical & Engineering News, the recovery times between excitation and emission are usually too long, within B10 À6 s. 45 This may arise from native point defect migration through the host lattice for charge transport and recombination, as the time magnitude is very similar.…”

Light based underwater wireless communications

“…54) A CRI of ∼89 and CCT of ∼3200 K have been achieved when using a blue LD exciting a combination of novel green-emitting CsPbBr 3 perovskite nanocrystals (NCs) and conventional red phosphor. 56) Apart from the white light characteristics, such as the CRI and CCT, the stability of phosphors is an important research topic owing to the fact that a significantly higher excitation power density is expected in LD based white lighting. 57) For high power laser based SSL lamp, the utilization of YAG:Ce single crystal phosphor plate has been investigated to reach a peak luminous flux of 1100 lm.…”