UV, Blue, Green, Yellow, Red, and Small: Newest Developments on Eu²⁺-Doped Nanophosphors

Abstract

Table 1. Existent Eu 2+ Nanophosphors, Size, and Emission Maximum (λ em ) for Nano and Bulk Phosphors compound size (nm) a λ em nano (nm) λ em bulk (nm) compound size (nm) a λ em nano (nm) λ em bulk (nm) aluminates

Layered host–guest long-afterglow ultrathin nanosheets: high-efficiency phosphorescence energy transfer at 2D confined interface

“…However, to date, an efficient phosphorescence energy transfer (PET) system has still very rarely been explored, probably because the long-lived emissive route of D is not easily available with the appearance of an A unit, since the long-lived excitation generally involves the conversion of the spin-allowed short-lived singlet states to the spin-forbidden triplet states. Studies of afterglow materials have mainly focused on transition metal or rare-earth (RE)-containing inorganic materials; 29 however, their high cost and relatively complicated synthesis methods ( e.g. , high-temperature solid-state process) have restricted their practical applications.…”

One-step structure-directing approach to Ce3+-doped CaS luminescent micro-nanocrystals

“…So phosphors with a larger size would show great improvement in PL intensity. As a result, the uniform self-assembly morphology and bright green luminescence under blue excitation make such material promising applications in displaying and light-emitting diodes [35][36][37][38][39][40][41][42][43] .…”

Multiscale and luminescent, hollow microspheres for gas phase thermometry

“…It is important to emphasize that while there is a significant lack in the synthesis methodology for hollow particles on the microscale , very interesting nano particles of phosphor materials have been described, e.g. SrAl 2 O 4 :Eu 2+ , 11 or MOF@Fe 3 O 4 /SiO 2 12 . Even hollow nanophosphors were synthesized, examples being Gd 2 O 2 SO 4 13 or SrZrO 3 :Eu 3+ for thermometry applications 14 .…”