Anion-assisted Yb³⁺and Mn²⁺doping of 0D and 2D lead halide perovskite nanostructures

Abstract

Currently, lead halide perovskite nanostructures are an essential platform for designing new optical materials with required functionalities. Photoluminescence (PL) wavelength tuning is an important tool for targeted applications of optical...

Halide exchange mediated cation exchange facilitates room temperature co-doping of d-and f-block elements in cesium lead halide perovskite nanoparticles

“…1h shows a binding energy range in CsPbBr 3 /MnCl 2 YbCl 3 NPs constituting overlapping bands that have been assigned to the Cl 2p (2p 1/2 and 2 p3/2 doublet), Yb 4d (4d 3/2 and 4 d5/2 doublet), and Br 3p (3p 1/2 and 3p 3/2 ). 35 The presence of Br XPS signatures corroborates the results of the XRD for CsPbBr 3 /MnCl 2 YbCl 3 NPs which argues a near completion of the halide exchange reaction ( vide supra ). The presence of the Mn 2p and Yb 4d signatures in the XPS data of the CsPbBr 3 /MnCl 2 YbCl 3 NPs confirms these elements as dopants and as constituents of the perovskite framework on post-synthetic treatment of CsPbBr 3 NPs with MnCl 2 and YbCl 3 (note the core level shifts in the Yb 4d spectra in the doped NPs when compared to the YbCl 3 salt, see Fig.…”

Near-infrared two-photon excited photoluminescence from Yb3+-doped CsPbClxBr3−x perovskite nanocrystals embedded into amphiphilic silica microspheres

“…7,51,52 The long decay of the Yb 3+ -related emission further supports the insertion of the guest ions into the perovskite lattice rather than their distribution at the NC surface. 25 Anion exchange from Cl − to Br − performed on Yb 3+ :CsPbCl 3 NCs…”

“…Apart from the Yb 3+ -related NIR emission, variation in the anion composition of a host perovskite matrix helps to tune the position of their band-edge (BE) emission, making these nanostructures versatile dual-band emitters. To date, development of Yb 3+ -doped perovskite NCs included novel synthetic approaches, 21–25 applications in solar harvesting, 26,27 light detection 22 and light-emitting 28–31 devices, as well as a deeper understanding of the fundamental processes governing the photoexcitation dynamics in these nanostructures. 32,33 While TPA-excited photoluminescence (PL) from perovskite NCs has been studied in detail, less attention has been given to multiphoton-excited PL from the dopant ions, mostly limited to Mn 2+ dopants.…”

Thickness-Dependent Photoluminescence Properties of Mn-Doped CsPbBr3 Perovskite Nanoplatelets Synthesized at Room Temperature

“…Recently, impurity ion doping has gained significant attention for its ability to control the optical properties of perovskite NPLs. − Among various dopants, Mn 2+ is the most widely investigated. − It is well-established that the introduction of Mn 2+ ions into the host material leads to the emergence of new magnetic and optical properties. This process involves energy transfer from excitons within the host to Mn 2+ ions, resulting in the emission of orange-red light due to the spin-forbidden 4 T 1 → 6 A 1 Mn 2+ d-d transition.…”