| Autor: |
Kubicki, Dominik J., Prochowicz, Daniel, Pinon, Arthur, Stevanato, Gabriele, Hofstetter, Albert, Zakeeruddin, Shaik M., Grätzel, Michael, Emsley, Lyndon |
| Zdroj: |
Journal of Materials Chemistry A; 2/7/2019, Vol. 7 Issue 5, p2326-2333, 8p |
| Abstrakt: |
Lead halide perovskites belong to a broad class of compounds with appealing optoelectronic and photovoltaic properties. Doping with transition metal ions such as Mn2+ and Co2+ has recently been reported to substantially enhance luminescence and stability of these materials. However, so far atomic-level evidence for incorporation of the dopants into perovskite phases has been missing. Here, we introduce a general and straightforward method for confirming the substitutional doping of bulk perovskite phases with paramagnetic dopants. Using 133Cs and 1H solid-state MAS NMR relaxation measurements we provide for the first time direct evidence that, consistent with current understanding, Mn2+ is incorporated into the perovskite lattice of CsPbCl3 and CsPbBr3 and does not form clusters. We also show that, contrary to current conviction, Co2+ is not incorporated into the perovskite lattice of MAPbI3. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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