Symposium EP05—Emerging Light-Emitting Materials and Devices—Halide Perovskite and Low-Dimensional Nanoscale Emitters
Devices that emit light have led to revolutionary advancement in the fields of the lighting, display, optical sensing and communication. Major research goals of light emitting materials have been targeted toward achievement of high luminescent efficiency and long device lifetime. Devices based on inorganic and organic emitters have been successfully commercialized and both exhibit distinct advantages in different applications (e.g. stability, flexibility in wavelength, color purity, large-area processing, etc.). New classes of light emitters such as inorganic, carbon, and halide perovskite light-emitters in forms of nanocrystals, nanoscale dots/wire/sheet, amorphous films, and polycrystal films are emerging for application in displays, lightings, lasers, and other optoelectronics beyond solar cells.
Recently, metal halide perovskites have emerged as a new class of light emitters. Combining the advantages of organic and inorganic emitters, perovskites have shown the potential for low-cost, wavelength-tunable, and high-color purity light-emitting diodes (LEDs). Since the first demonstration of bright room temperature emission from perovskiteLEDs in 2014, rapid progress has been made on the photophysics of halide perovskites such as the exciton lifetime, charge carrier traps, and luminescent quenching. The fundamental understanding has led to remarkable improvement on device performance including the brightness, the quantum efficiency, and the stability during extended operation. Moreover, the development of light-emitting perovskites also benefits from the emergence of low-dimensional crystals with various morphology produced using newly developed synthetic schemes. While the underlying mechanisms of radiative recombination are still debatable, more experimental evidences collectively indicate that confining charge carriers in small crystallites, such as nanocrystals, nanowires, nano-sheets and films with nanocrystalline grains, is a very effective means to overcome the problems of large exciton diffusion lengths and significant exciton dissociation. Furthermore, carbon or inorganic low-dimensional materials in the form of quantum dots, nanowires, and nanosheets are also emerging for display and lighting applications.
This symposium will be dedicated to the synthesis, photophysics and devices of emerging light emitting materials. While reports on metal halide perovskites will be particularly encouraged, outstanding achievements from the most recently research in other carbon and inorganic nanoscale materials will also be the topics in two sessions. Besides electroluminescence, materials for down-conversion emission and stimulated emission (laser) will also be covered. Subjects to be discussed in this symposium will span from fundamental material development including the synthesis and characterization of the materials, to practical device demonstration concerning engineering and optimization of device performance.
The symposium will deliver multidisciplinary topics related to chemistry, physics, materials science and engineering of the emerging light emitters. Active, renowned researchers in relevant fields will be invited to present in order to enhance the impact of the discussions and encourage the attendance of the symposium.