Ding Yamei, He Ping, Li Shaohan, Chang Bo, Zhang Shengli, Wang Zhehan, Chen Jiayi, Yu Jin, Wu Sanxie, Zeng Haibo, Tao Li
School of Materials Science and Engineering, Jiangsu Key Laboratory of Advanced Metallic Materials, Southeast University, Nanjing 211189, China.
College of Materials Science and Engineering, Key Laboratory of Advanced Display Materials and Devices, Ministry of Industry and Information Technology, Nanjing University of Science & Technology, Nanjing 210094, China.
ACS Nano. 2021 Sep 28;15(9):14610-14617. doi: 10.1021/acsnano.1c04321. Epub 2021 Jul 29.
Hexagonal boron nitride quantum dot (BNQD) has aroused great interest in the optoelectronics field due to their metal-free nature with promising optical properties. However, it has been a great challenge to modulate its photoluminescence to the long-wavelength region so far. Herein, BNQDs with full-color emission (420-610 nm) have been implemented by doping diverse amino ligands in different solvents for the first attempt. This color variation from blue, green, yellow-green, yellow to red is ascribed to the surface states tunable amination degree. Attractively, the quantum yield of our blue BNQDs has set a record at 32.27%, and rare yellow-green BNQDs have been demonstrated. Combining good thermal dissipation capability and high transparency, our full-color BNQD holds great potential for transparent flexible display and security labels at the elevated temperature.
六方氮化硼量子点（BNQD）因其无金属特性和有前景的光学性质而在光电子领域引起了极大关注。然而，迄今为止，将其光致发光调制到长波长区域一直是一个巨大的挑战。在此，首次尝试通过在不同溶剂中掺杂不同的氨基配体来实现具有全色发射（420 - 610 nm）的BNQDs。这种从蓝色、绿色、黄绿色、黄色到红色的颜色变化归因于表面态可调的胺化程度。吸引人的是，我们蓝色BNQDs的量子产率达到了32.27%的创纪录水平，并且展示了稀有的黄绿色BNQDs。结合良好的热耗散能力和高透明度，我们的全色BNQD在高温下用于透明柔性显示器和安全标签具有巨大潜力。
