Constructing honeycomb architectures from polymer carbon dot composites for luminous efficacy enhancement of LEDs
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In this work, we report a facile construction of honeycomb-patterned membranes from polymer carbon dot (PCD) composites, which are demonstrated to effectively enhance the luminous efficacy of GaN-based light-emitting diodes (LEDs). A series of PCD composites were successfully achieved by a pyrolysis process from poly(methyl methacrylate-co-dimethyl diallyl ammonium chloride) copolymers, in which CDs were in situ formed and bonded with the polymer chains. Subsequently, ordered porous PCD membranes with a bifunctionality of fluorescence and hydrophobicity were generated via a “breath figure” method under humid conditions. Significantly, these honeycomb-like architectures could contribute to 41.9% improvement of the luminous efficacy for LEDs, showing great potentials for electrical, optoelectronic, and photovoltaic applications.
This work was supported by the National Natural Science Foundation of China (21706122 and 21736006), National Key Research and Development Program of China (2016YFB0401700), Fund of State Key Laboratory of Material-Oriented Chemical Engineering (ZK201704 and ZK201716), and Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
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