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A fluorescein-centered polymer as a phosphor for fabricating pure white light-emitting diodes  
A fluorescein-centered polymer as a phosphor for fabricating pure white light-emitting diodes
资料类型: PDF文件
关键词: LEDs  fluorescein-centered  polymers  
资料大小: 1624k
所属学科: 高分子化学
来源: 来源网络
简介:
White light-emitting diodes (LEDs) are very important energy-saving lighting devices. It is still a big challenge to fabricate pure white LEDs using low-cost, easy-to-process and environment-friendly phosphors. Herein, we report a pure white LED fabricated by combining rationally designed fluorescein-centered polymers with a blue LED chip. Pure white LEDs with Commission International de L’Eclairage (CIE) coordinates of (0.33, 0.33), a satisfactory color rendering index (CRI) of 82 and a correlated color temperature (CCT) of 5230 K were achieved. Covalently embedding fluorescein into the center of the polymer chain realizedmolecular dispersion of fluorescein.Of significance, by varying the types of the side groups of the polymer, the fluorescence properties of the embedded fluorescein unit can be regulated. The performance parameters (i.e., emission spectra, CIE coordinates, CRI and CCT) of the as-fabricated LEDs could also be tailored by varying the working voltages, and the types and amounts of fluorescein-centered polymers.
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上传时间: 2019-04-01 16:31:00
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