Abstract
White light, which contains polychromic visible components, affects the rhythm of organisms and has the potential for advanced applications of lighting, display, and communication. Compared with traditional incandescent bulbs and inorganic diodes, pure organic materials are superior in terms of better compatibility, flexibility, structural diversity, and environmental friendliness. In the past few years, polychromic emission has been obtained based on organic aggregates, which provides a platform to achieve white-light emission. Several white-light emitters are sporadically reported, but the underlying mechanistic picture is still not fully established. Based on these considerations, we will focus on the single-component and multicomponent strategies to achieve efficient white-light emission from pure organic aggregates. Thereinto, single-component strategy is introduced from four parts: dual fluorescence, fluorescence and phosphorescence, dual phosphorescence with anti-Kasha’s behavior, and clusteroluminescence. Meanwhile, doping, supramolecular assembly, and cocrystallization are summarized as strategies for multicomponent systems. Beyond the construction strategies of white-light emitters, their advanced representative applications, such as organic light-emitting diodes, white luminescent dyes, circularly polarized luminescence, and encryption, are also prospected. It is expected that this review will draw a comprehensive picture of white-light emission from organic aggregates as well as their emerging applications.
Highlights
Light has illuminated the world and promoted the development of society, especially since Thomas Edison invented incandescent lightbulbs in 1879
From the mechanistic perspective, we focus on the fundamental strategies to achieve efficient white-light emission from pure organic aggregates, which are summarized from single-component and multicomponent systems, respectively (Fig. 1)
From the perspectives of single-component and multicomponent systems, we have discussed the recent progress of the development of white-light emission using organic molecules in the aggregate state
Summary
Light has illuminated the world and promoted the development of society, especially since Thomas Edison invented incandescent lightbulbs in 1879. It affects the metabolism of humans and controls the circadian rhythm of organisms.[1] To mimic natural sunlight, steps on the exploration of white-light luminescent materials have never stopped. They have exhibited a wide range of lighting applications in illumination, industry automotive, information communication, and luminescent dyes. It is expected that this review will draw a comprehensive picture for white-light emitters of organic aggregates
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