| 초록 |
Perovskite materials have attracted great attention due to their special optical properties, such as convenient tunable bandgaps, narrow emission band width and high photoluminescence quantum yield (PLQY). In this study, CsPbBr3 perovskite quantum dots were synthesized by hot-injection method and the surface ligands were removed and controlled by different solvent treatment in order to be applied to quantum dot light-emitting diodes (QLEDs). The QDs have high PL emission at 516 nm, whereas EL emission (green) at 519 nm with narrow FWHM of ~18 nm. The ITO/PEDOT:PSS/Poly-TPD/QDs/TPBi/LiF/Al device demonstrated that the ligands have a great effect on the performance and the champion devices show a luminescence of ~1000 Cd m-2, current efficiency of 2.4 cd A-1 and EQE value of 0.7%. |
