Samples | Mn,P4VP* (kg/mol) | Mn,PtBA† (kg/mol) | Mn,PS‡ (kg/mol) | Mn,PEO§ (kg/mol) | PDI§ | Dimensions of MAPbBr3/SiO2 core/shell NCs (core diameter/shell thickness)║ (nm) |
Sample A | 8000 | 14,600 | – | 5000 | 1.15 | 6.1 ± 0.3/8.9 ± 0.4 |
Sample B | 9300 | 21,600 | – | 5000 | 1.18 | 8.0 ± 0.3/9.8 ± 0.4 |
Sample C | 8500 | 13,800 | 5,000 | – | 1.19 | 6.8 ± 0.3/8.0 ± 0.3 |
Sample D | 7800 | 15,600 | 10,000 | – | 1.19 | 6.0 ± 0.4/8.9 ± 0.5 |
*Number average MW of the inner P4VP block (Mn,P4VP) was calculated from 1H NMR data. The calculation method was adapted from a previous work (33).
†Number average MW, Mn of each PtBA block calculated on the basis of 1H NMR data from the MW difference between PtBA block and P4VP block. The intermediate PtBA block can be calculated by the following equation
‡Number average MW of the outer PS block was calculated from 1H NMR data based on the following equation
§PDI was recorded by DMF GPC.
║The core diameter and shell thickness of core/shell NCs were determined by performing image analysis on TEM images of MAPbBr3/SiO2 core/shell NCs.