| Autor: |
Konoshchuk, N. V., Rozovik, O. P., Fedorenko, H. V., Koshechko, V. G., Pokhodenko, V. D. |
| Předmět: |
|
| Zdroj: |
Theoretical & Experimental Chemistry; Nov2023, Vol. 59 Issue 5, p332-342, 11p |
| Abstrakt: |
A series of Mn2+ -doped hybrid perovskites MAPb1-xMnxHal3 (MA = CH3NH3, Hal = Cl and Br in different ratios, x = 0.33, 0.5, 0.67, 0.8) was obtained for the first time by mechanochemical synthesis. It is shown that materials obtained retain the perovskite structure even at the highest content of manganese ions (x = 0.8), and their structural and optical characteristics are mainly determined by the Cl/Br ratio. It is established that dispersions in toluene and nanocomposite films in polystyrene exhibit the intense photoluminescence (PL) due to the formation of pseudo-2D nanoparticles as a result of the ultrasonic disintegration of powders in an organic solvent. It is shown that the PL spectra of dispersions and nanocomposite films based on MAPb1–xMnxCl3 are characterized by the appearance of an additional emission band from Mn2+ ions in the red region of the spectrum, due to which it is possible to increase the PL quantum yield from 0.2% (for the undoped sample) to 6.3% (films) and 10.2% (dispersions). [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink