The study found that perovskite nanocrystals can realize data communication and lighting

The king Abdullah University of science and technology researchers have shown that perovskite nanocrystals can lead cesium bromide to produce white light, can be used as efficient lighting source and ultra fast data transmission.

Visible light communication recently proposed (VLC) is a promising and energy-efficient lighting and high speed data communication technology, the use of visible wavelength (380-700nm) electromagnetic radiation, rather than the conventional radio frequency (RF) wave communication. In fact, with the conventional communication system based on RF, VLC has several advantages, including high security, fast, and does not need to adjust the bandwidth and not crowded.

In a typical VLC system, the transmitter with phosphor (blue, green and yellow / red color converter) LED or laser diode (LD) to produce white light for solid state (SSL) and data communication. However, the modulation bandwidth of VLC system under phosphorus limitation. That is to say, the conventional yttrium aluminum garnet (YAG) phosphor based long excited state lifetime (re emission photon absorption time) poses a serious bottleneck in the VLC application. Therefore, with a phosphor associated bandwidth VLC system will be limited to about 10MHz, and the offset with respect to the key advantages of RF communication system.

In recent years, perovskite has become optoelectronic applications (photovoltaic and photoelectric detector) of the "magic" of material. In addition, recent research has revealed that the perovskite nanocrystals (NC) with cesium lead bromide form has a relatively high photoluminescence quantum yield (PLQY) and photoluminescence (PL) life. In fact, the high PLQY and PL combined with short life is a basic requirement of the ideal SSL and VLC color converter.

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