Synthesis of highly luminescent CsPbxMn1−xCl3 perovskite nanocrystals via using metal-organic Mn-Complex as precursor

Abstract

Mn doping of CsPbCl3 perovskites nanocrystals (PNCs) would trigger the excitation energy transfer from host of PNCs to Mn (II) and lead to bright orange emission. Furthermore, Mn doped can effectively replace toxic Pb in PNCs. In this work, we first propose a novel synthesis method of CsPbxMn1-xCl3 PNCs using metal-organic Mn-trioctylphosphine oxide complex (Mn-TOPO) as the Mn source by hot-injection (HI) method. Compared with the CsPbxMn1-xCl3 PNCs prepared via conventional approach, the as-prepared product exhibited much more excellent properties, such as higher Mn substitution ratio, higher photoluminescence quantum yields (up to 63%). More importantly, the dispersibility and stability in solvents were significantly improved. In addition, some synthesis parameters of Mn-TOPO complex which could affect the property of PNCs, such as the reaction temperature and reaction time were optimized in the experiment. Finally, the CsPbxMn1-xCl3 PNCs were used as color conversion materials in the preparation of light-emitting diode (LED) devices.