Record-breaking VLC

SPIE Newsroom features "Perovskite nanocrystals as color converters for record-breaking visible light communications"

"Cesium lead bromide perovskite nanocrystals are used to generate white light that can be used as both an efficient lighting source and for ultrafast data transfer."

"In recent years, perovskites have emerged as ‘magic’ materials for optoelectronic applications (e.g., photovoltaics and photodetectors). Moreover, recent studies have revealed that perovskite nanocrystals (NCs) - in the form of cesium lead bromide (CsPbBr3) - have relatively high photoluminescence quantum yields (PLQYs) and short photoluminescence (PL) lifetimes. In fact, this marriage of high PLQY and short PL lifetime is the essential requirement for ideal SSL and VLC color converters."

"In our work, we have therefore investigated the fast color-conversion behavior of CsPbBr3 perovskite NCs when they are used as a phosphor for white light transmission in an SSL-VLC dual-function system. Our perovskite NCs are inexpensive and relatively easy to prepare."

"This result indicates that our high-quality perovskite NCs are a cost-effective color-converter option for laser-based indoor illumination. In addition, by varying the chemical composition of our perovskite NCs (e.g., by substituting different halides or metal ions), we can achieve flexible fine tuning of the color."

Perovskite Nanocrystals as a Color Converter for Visible Light Communication
Ibrahim Dursun, Chao Shen, Manas R. Parida, Jun Pan, Smritakshi P. Sarmah, Davide Priante, Noktan Alyami, Jiakai Liu, Makhsud I. Saidaminov, Mohd S. Alias, Ahmed L. Abdelhady, Tien Khee Ng, Omar F. Mohammed, Boon S. Ooi, and Osman M. Bakr
ACS Photonics, 3(7), 1150–1156 (2016)

DOI: 10.1021/acsphotonics.6b00187

HDL: 10754/611784