Metal Halide Perovskites for Photodetection

Lin, Qianqian

doi:10.1002/9781119579182.ch19

Cited by 3 publications

(1 citation statement)

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“…As a representative perovskite, lead halide perovskites process the typical crystal structure with the chemical formula of ABX 3 , where A represents a monovalent inorganic or organic cation [MA + = CH 3 NH 3 + ; FA + = HC(NH 2 ) 2 + ; or Cs + ], B presents Pb 2+ , and X is a halide anion (typically, Cl − , Br − , I − , or mixtures thereof ) (8,9). The great achievements based on lead halide perovskites in photovoltaics and optoelectronics have been made, such as solar cells (10)(11)(12), light-emitting diodes (LEDs) (13)(14)(15), photodetectors (16)(17)(18), and lasers (19). However, pristine perovskites have some inherent drawbacks, for instance, limited adjustability of optical and electrical properties and poor stability (against water, oxygen, heat, etc.…”

Section: Introductionmentioning

confidence: 99%

Atomic-scale imaging of ytterbium ions in lead halide perovskites

Xu,

Liu,

Dong

et al. 2023

Sci. Adv.

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Lanthanide-doped lead halide perovskites have demonstrated great potential for photoelectric applications. However, there is a long-standing controversy about the existence of lanthanide ions, e.g., whether the doping of Ln 3+ is successful or not; the substituting sites of Ln 3+ in lead halide perovskites are unclear. We directly identify the doped Yb 3+ in CsPbCl 3 perovskites by using the state-of-the-art transmission electron microscopy and three-dimensional atom probe tomography at atomic scale. Different from the previous assumptions and/or results, we evidence that Yb 3+ simultaneously replace Pb 2+ and occupy the lattice interstitial sites. Furthermore, we directly observe the cluster phenomenon of CsPbCl 3 single crystal at near atomic scale. Density functional theory modeling further confirms and explains the mechanisms of our findings. Our findings thus provide an atomic-level understanding of the doping mechanism in perovskites and will stimulate a further thinking of the doping effect on the performance of perovskites.

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