Journal
JOURNAL OF LUMINESCENCE
Volume 243, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2021.118622
Keywords
Perovskite quantum dots; Mn-doping; Solid-state luminescence
Categories
Funding
- Taishan Scholars Program of Shandong Province [tsqn201909117]
- Natural Science Foundation of Shandong Province [ZR2021YQ32]
- Youth Science and Technology Talent Promotion Project of Jiangsu Association for Science and Technology
- National Natural Science Foundation of China [21802074, 11604155]
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Mn2+ doping in CsPbCl3 perovskite quantum dots affects their photoluminescence, with stable properties observed at certain doping concentrations. Anion exchange reactions between stable CsPb0.796Mn0.204Cl3 and CsPbBr3 PQDs result in a wide fluorescence color gamut for Mn:CsPb(Cl/Br)3 PQDs.
Mn2+ doping has been developed to modulate the photoluminescence (PL) of CsPbCl3 perovskite quantum dots (PQDs). However, the doped Mn2+ may be expelled from the PQDs host with the long-term storing, resulting in inferior stability. Herein, CsPbCl3 PQDs doped with different concentrations of Mn2+ (Mn:CsPbCl3) are prepared by a hot injection method. Our photostability tests reveal that when the doping concentration is <25%, or 40%- 50%, the Mn2+ doped PQDs are intrinsically stable. Anion exchange reactions are conducted between the stable CsPb0.796Mn0.204Cl3 and CsPbBr3 PQDs. Fluorescence color gamut of the resulting Mn:CsPb(Cl/Br)3 PQDs almost covers the entire visible spectrum except for the deep red color. Benefiting from the intrinsic stability and wide color gamut, multicolor solid-state luminescence are acquired by incorporating the Mn:CsPb(Cl/Br)3 PQDs in polymethyl methacrylate (PMMA) matrices, which are used as color converters for constructing light-emitting diodes (LEDs) with different colors.
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