Research on the photoluminescence properties of Cu²⁺-doped perovskite CsPbCl₃ quantum dots

Abstract

Schematic of the synthesis of Cu:CsPbCl3 QDs and PL spectra.

Transition metal ion-doped cesium lead halide perovskite nanocrystals: doping strategies and luminescence design

“…Generally, Cu 2+ can be readily doped in CsPbX 3 (X = Cl, Br, I or mixture) NCs. 63,82,83 By employing reductive reagents such as trioctylphosphate in the solution, Cu + can be doped into CsPbCl 3 NCs. 75 Interestingly, the selection of transition metal precursors may result in different doping sites of transition metal ions in CsPbX 3 NCs.…”

“…In another work, Wu et al proposed that the transition from the T 2 energy level of Cu 2+ to the conduction band of CsPb(Cl/Br) 3 NCs promoted the recombination of excitons via the radiative pathway, thus effectively enhancing the PLQYs of CsPbCl 3 NCs from 3% to 51%. 82 In addition to near band edge states tuning, the doping with transition metal ions may also engineer the local structure of cesium lead halide perovskite NCs to improve their luminescence efficiency. A typical example is Ni 2+ doping in CsPbCl 3 NCs, where NiCl 2 was employed as a dopant precursor.…”

Lanthanide-doped inorganic halide perovskites (CsPbX3): novel properties and emerging applications

“…Metal ions (M-ion), other than lanthanides, such as alkali metal cations Li + , 131 Na + , 132 K + , 133,134 and Rb + , 135 alkaline earth metal cations Mg 2+ , 136 and Ca 2+ , 137 transition metals Zn 2+ , 138,139 Mn 2+ , [140][141][142][143] Ni 2+ , 144,145 Cu 2+ , 146,147 Ti 3+ , 148,149 Y 3+ , 150 and Cd 2+ , 124 post-transition metal Sn 2+ , 151 etc., have also been incorporated with the all-IHPs. These metal ions also improve the optoelectronic properties and the stability of IHPs against various environments.…”

“…136 3.1.1.3 Transition metal ion-doped CsPbX 3 . Transition metals such as Zn 2+ , 138,139 Mn 2+ , [140][141][142][143] Ni 2+ , 144,145 Cu 2+ , 146,147 Cd 2+ , Ti 3+ , 148,149 Y 3+ , 150 Cd 2+ , 124 etc., have been used as dopant elements for all-IHPs. The Mn 2+ ion has been widely used for improving the PLQYs and stability and to reduce the toxicity of Pb-based all-IHPs.…”

Enhance luminescence or change morphology: effect of the doping method on Cu2+-doped CsPbBr3 perovskite nanocrystals

“…34 Doping Cu 2+ in all-inorganic CsPbX 3 NCs not only improved their optical characteristics, but also changed the morphologies of the CsPbX 3 NCs. 32–35 However, to the best of our knowledge, there has been no research to study the influence of Cu 2+ on CsPbBr 3 NCs while using different doping methods.…”