(7) The conventional phosphor for white LED (WLED) illumination, yttrium aluminum garnet (YAG) phosphor Y 3– xAl 5O 12: xCe 3+ (YAG:Ce), (8) has a critical limitation for VLC applications due to the slow phosphor conversion process caused by the long excited-state lifetimes, (3) on the order of microseconds. (2, 5, 6)Ī typical white light source in a VLC system is made of a blue-emitting LED or a laser diode (LD) with phosphors partially converting blue light into green, yellow, and/or red emission. (1-4) VLC has many advantages compared with lower frequency communications approaches (including Wi-Fi and Bluetooth), such as energy efficiency, an unregulated communication spectrum, environmental friendliness, greater security, and no RF interferences. Light-emitting diodes (LEDs) can be utilized as light sources not only for illumination but also for data transmission the latter application is referred to as visible light communication (VLC). Expanding the wireless communications window by using white light provides a new pathway for uninhibited growth in data communications and consumption. Existing radio frequency (RF) and microwave wireless technologies cannot keep up with this surging demand because of their crowded spectra and limited bandwidth. Over the next decade, the demand for communications systems and data transfer, especially wireless technologies, is expected to grow at an exponential rate.

Moreover, this perovskite-enhanced 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.ĭata and wireless communications support much of the economic and social structures underlying our daily lives.

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. 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. 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. This technology is envisioned to be a major part of the solution to the current bottlenecks in data and wireless communication. Visible light communication (VLC) is an emerging technology that uses light-emitting diodes (LEDs) or laser diodes for simultaneous illumination and data communication.

Wavelength color converter