Luminescent hybrid materials based on nanodiamonds

Publication date: Available online 4 November 2017
Source:Carbon
Author(s): Dongxue Zhang, Qi Zhao, Jinhao Zang, Ying-Jie Lu, Lin Dong, Chong-Xin Shan
Luminescent hybrid materials were prepared by covalently functionalizing nanodiamonds (NDs) with rare earth (RE) complexes. Pyromellitic acid (PMA), as the organic sensitizer, was grafted onto amino-terminated NDs to chelate lanthanide ions (Eu³⁺ and Tb³⁺). The emission colors of the hybrid composite of ND-PMA-EuxTby can be tuned from red to orange, yellow and green by adjusting the molar ratio of Eu³⁺ to Tb³⁺. Moreover, the luminescence of the hybrid composites exhibits remarkable photostability under ultraviolet irradiation for 60 h. As a proof-of-concept experiment, the as-synthesized ND-PMA-Eu and ND-PMA-Tb were employed as the phosphors for red and green light-emitting-diode (LED) devices with ultraviolet (UV) chips. Therefore, the nanodiamond-based luminescent hybrid material may find potential application in optical device.

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