Efficient Full-Color Boron Nitride Quantum Dots for Thermostable Flexible Displays.

Ding, Yamei; He, Ping; Li, Shaohan; Chang, Bo; Zhang, Shengli; Wang, Zhehan; Chen, Jiayi; Yu, Jin; Wu, Sanxie; Zeng, Haibo; Tao, Li

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 via 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.