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Systematic Microwave-Assisted Postsynthesis of Mn-Doped Cesium Lead Halide Perovskites with Improved Color-Tunable Luminescence and Stability
| Content Provider | MDPI |
|---|---|
| Author | Zhang, Yaheng Fan, Chao Tang, Jianghong Huang, Gaoming Qiang, Xinfa Fu, Yu Zhou, Wenjuan Wu, Juan Huang, Shouqiang |
| Copyright Year | 2022 |
| Description | The metal doping at the $Pb^{2+}$ position provides improved luminescence performance for the cesium lead halide perovskites, and their fabrication methods assisted by microwave have attracted considerable attention due to the advantages of fast heating and low energy consumption. However, the postsynthetic doping strategy of the metal-doped perovskites driven by microwave heating still lacks systematic research. In this study, the assembly of $CsPbBr_{3}/CsPb_{2}Br_{5}$ with a strong fluorescence peak at 523 nm is used as the $CsPbBr_{3}$ precursor, and through the optimization of the postsynthetic conditions such as reaction temperatures, $Mn^{2+}/Pb^{2+}$ feeding ratios, and $Mn^{2+}$ sources, the optimum $Mn^{2+}$-doped product $(CsPb(Cl/Br)_{3}$:Mn) is achieved. The exciton fluorescence peak of $CsPb(Cl/Br)_{3}$:Mn is blueshifted to 437 nm, and an obvious fluorescence peak attributing to the doped $Mn^{2+}$ ions at 597 nm is obtained. Both the $CsPbBr_{3}$ precursor and $CsPb(Cl/Br)_{3}$:Mn have high PLQY and stability because there are $CsPb_{2}Br_{5}$ microcubic crystals to well disperse and embed the $CsPbBr_{3}$ nanocrystals (NCs) in the precursor, and after $Mn^{2+}$-doping, this structure is maintained to form $CsPb(Cl/Br)_{3}$:Mn NCs on the surface of their microcrystals. The exploration of preparation parameters in the microwave-assisted method provides insights into the enhanced color-tunable luminescence of the metal-doped perovskite materials. |
| Starting Page | 2535 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano12152535 |
| Journal | Nanomaterials |
| Issue Number | 15 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-07-23 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Inorganic Chemistry Microwave Heating Postsynthetic Doping Strategy Mn2+-doped Cesium Lead Halide Perovskite Photoluminescence Stability |
| Content Type | Text |
| Resource Type | Article |
