| 초록 |
Within the course of the IRTG we developed a process to coat CdSe and InP QDs with semiconducting polymers. This allows it to disperse the QDs homogeneously in the matrix of the semiconducting polymer to deliver charges to the QDs.1 As a result the efficiency of QD-LEDs could be significantly improved.2 This work was recently expanded to demonstrate the suppression of electron trapping by quantum dot emitters using a grafted insulating polystyrene shell.3 This prevents the transfer of charges to the QDs, which act also a trapping sites, while the transfer of the electronic excitation is still possible. In this way QD-LEDs with a voltage independent electroluminescence spectrum and equal efficiency as the blue polymer host get accessible.3 (1) M. Zorn, W.K. Bae, et al, ACS Nano, 3, 1063 (2009). (2) A. Fokina, Y. Lee, et al, Adv. Mater. Interfaces, 3, 1600279 (2016). (3) E. Khodabakhshi, B. Klöckner, et al, Mater. Horiz., DOI: 10.1039/C9MH00551J (2019). |
