In:
Advanced Optical Materials, Wiley
Abstract:
As the field of perovskite emerges, doping presents an optimistic way to upgrade the functionalities of these materials and improve the photoluminescence quantum yield (PLQY). While doping is well‐explored in perovskites, it has received less attention in layered double perovskites (LDPs). Doping with lanthanides is particularly interesting for these wide bandgap materials because of their narrow and intense luminescence spectra. Here, the doping of (PEA) 4 NaInCl 8 LDP (PEA = Phenylethylammonium) with Tb 3+ and complex of Tb 3+ with hexafluoroacetylacetonate (hfa) is studied, i.e., tetrakis β‐diketonate complex. In both cases, energy transfer from host to dopant leading to photoluminescence (PL) emission due to Tb 3+ f‐f transitions is observed. However, in the case of Tb 3+ doping, sensitization is not very efficient due to the nonideal alignment of energy levels of the host and resonance acceptor energy levels of Tb 3+ . Whereas, doping of (PEA) 4 NaInCl 8 with Tb 3+ in the form of hfa complex, provides a more ideal energetic environment for the efficient energy transfer from host to Tb 3+ in the LDP matrix, resulting in a 20‐fold enhancement in the luminescence efficiency. The doping of Tb 3+ and Tb 3+ complex in LDP sets the foundation for a new approach for the synthesis of LDPs‐lanthanide host‐guest systems for high PLQY.
Type of Medium:
Online Resource
ISSN:
2195-1071
,
2195-1071
DOI:
10.1002/adom.202302456
Language:
English
Publisher:
Wiley
Publication Date:
2024
detail.hit.zdb_id:
2708158-8
