发光
荧光粉
热稳定性
发光二极管
材料科学
光致发光
二极管
显色指数
光电子学
化学
有机化学
作者
Luqiao Yin,Yuxian Yan,Huazhang Guo,Liang Wang,Huixin Xiu,Jianhua Zhang
标识
DOI:10.1109/ted.2021.3094495
摘要
Solid-state carbon dots (CDs) are a new kind of color converting material for white light-emitting diodes (white LEDs) because of its good luminesce performance and low toxicity; however, CDs in solid state suffer from aggregation-caused quenching (ACQ); thus, solid-state CDs need to be dispersed into or encapsulated with matrix. Herein, we prepared the CDs in one-pot hydrothermal method and encapsulated the CDs with BaSO 4 matrix by electrostatic force guided assemble; the CDs@BaSO 4 phosphor is further dispersed into silica gel for white LEDs' application. The thermal stability of our CDs is significantly improved after BaSO 4 warping and further application on white LEDs shows great luminescence property of our CDs@BaSO 4 phosphors. The morphology, structure, photo luminescence properties, thermal stability, and photo stability of the phosphor are investigated. The fabricated white LEDs characterize for CIE coordinate at (0.3669, 0.3671), belonging to white gamut, and an ultrahigh color rendering index (CRI) (including three indicators: R a = 95.1, R 9 = 88.65, and R 13 = 97.9).
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