In:
Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), Vol. 10, No. 26 ( 2022), p. 9834-9840
Kurzfassung:
Colloidal CsPbBr 3 perovskite nanoplatelets (NPLs) with readily controllable thickness are considered promising blue-emitting materials. However, the relatively low photoluminescence quantum yield (PLQY) and poor stability hinder their further applications. Herein, a class of novel surface ligands, such as 2-butynoic acid (BtA), phenylpropiolic acid (PA) and 2-pentynoic acid (PtA), are proposed for conveniently preparing high-performance blue-emitting NPLs. Benefiting from the strong electron delocalization effect of alkynyl, the protonated amine species (RNH 3 + ) and R–CC–COO − prefer to coordinate with the perovskite, which can not only enhance the PLQY of NPLs from ∼15% to ∼100%, but also promote their endurability to high temperatures and strong UV irradiation. To our knowledge, this is the first report on the post-treatment of perovskites with electron delocalized ligands containing alkynyl and the effect of electron delocalization of Lewis bases on high-performance NPLs is systematically investigated from the perspective of molecular structure, which will be helpful to develop novel short-chain and conjugated ligands for perovskite electroluminescence devices.
Materialart:
Online-Ressource
ISSN:
2050-7526
,
2050-7534
Sprache:
Englisch
Verlag:
Royal Society of Chemistry (RSC)
Publikationsdatum:
2022
ZDB Id:
2702245-6
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