| 초록 |
CH3NH3PbX3(X = Br, I) perovskite Quantum Dots (PQDs) have excellent physical and chemical properties, but have been limited due to poor efficiency than conventional QDs. PQDs are undergoing experiments with many efforts to improve efficiency and stability. We succeeded in synthesizing colloidal QDs that can simultaneously improve efficiency and stability. Octylamine, which controls the size of QDs, and the oleic acid, which acts as a stabilizer, are separately dissolved to conduct the experiment. We call this the S-LMRP (Split-Ligand Re-Precipitation) technique, and it is done in an easy way. Strong luminescence and narrow FWHM can be obtained. The experiment was performed under ambient conditions, and PLQY of CH3NH3PbX3was obtained up to 91.5%. CH3NH3PbX3 synthesized through S-LMRP is maintained a strong PL intensity even after 500 hour. These results suggest that PQDs through the proposed synthesis method have potential for high-performance displays and technology using QDs. |
