BN/CsPbX3复合纳米晶的制备及其白光LED应用

摘要

全无机钙钛矿(CsPbX3)纳米晶因其出色的光电特性在光电子器件领域具有广泛应用,然而稳定性依然是制约其发展的瓶颈.本工作结合当前的研究进展,采用全固态反应,通过对球磨参数以及反应物配比等多种条件的调控研究,实现了在空气中可稳定放置60 d以上的BN/Cs PbX3复合纳米晶荧光粉,其发光中心波长可覆盖417～680 nm的范围,发光峰半高宽为23～47 nm,展示出极高的色纯度.在出色发光性能基础上,进一步将其直接应用于白光LED照明,获得了出色、稳定的发光性能.在空气中放置1 m后,其亮度衰减仅为0.7％,且连续工作2 h后,衰减程度小于4％,展现出优异的工作稳定性.%All inorganic perovskite (CsPbX3) nanocrystals has wide applications in the field of optoelectronic devices due to its excellent photoelectric characteristics, however, stability is still the bottleneck restricting its development.Combining with the current research progress, the BN/CsPbX3 composite nanocrystals phosphors was synthesized via all-solid-state reactions.During the process, parameters of ball milling, ratio of reactants and other reaction conditions were optimized, thus the BN/CsPbX3 composite nanocrystals can be stable in the air for more than 60 days.Its luminescence wavelength can cover the range of 417-680 nm with full width at half maximum of 23-47 nm, showing high color purity, and was further used in white LED with high stability and luminance.After placed in the atmosphere for a month, the attenuation of LED luminance is only about 0.7％, and less than 4％deterioration was observed after continuous work of 2 h, showing great working stability.