Perovskite quantum dots are the rising stars of
quantum emitters, but their inherent instability has hampered their
development. Professor Hao-Wu Lin of the Department of Materials
Science and Engineering, Associate Professor Chih-Sung Chuu of the
Department of Physics, and Professor Richard Schaller of the
Department of Chemistry at Northwestern University in the United
States have jointly developed a perovskite quantum emitter with
high stability and self-healing ability by a self-developed,
simple, and economical procedure—spray-synthesis method. The
unprecedented single-photon brightness of these quantum dots breaks
the world-record, which makes them become the brightest
room-temperature quantum emitter materials and constitute a major
breakthrough in both quantum communication and quantum
computing.