Lanthanide (III) complexes are used extensively in solar conversion devices, such as
Luminescent Solar Concentrators (LSCs) and Luminescent Down-Shifting (LDS) for
their peculiar characteristics of narrow band emission, avoidance of re-absorption
losses due to large Stokes shift and possibility of high photoluminescence quantum
yield (PLQY).
The study has looked into the synthesis of Ln (III) complexes of the general formula:
[Ln(hfac)3DPEPO], where DPEPO = bis(2-(diphenylphosphino)phenyl)ether oxide,
and hfac = hexafluoroacetylacetonate. The work presented in this thesis focuses on
the synthesis, and subsequent photophysical characterisation of these Ln(III)
complexes, plus characterisation and spectroscopic study of [Tb(pobz)3(hacim)2],
(where Hpobz = phenoxybenzoic acid, and Hacim = acetylacetone imine), yielding
results that open new design of functional Ln(III) systems.
Spectroscopic study of Chromium dioxalate and analogous compounds has
revealed that with the appropriate design, Cr(III)Ln(III) energy transfer can be
achieved, while study of polyaromatic hydrocarbons (PAH) such as coronene,
enable to explore a ligand with better absorption in the whole UV region. These
results open attractive perspectives for light-conversion systems, such as LSC
devices