Effects of Deuterium Isotopes on Pt(II) Complexes and Their Impact on Organic NIR Emitters.
Angew Chem Int Ed Engl
; 63(10): e202317571, 2024 Mar 04.
Article
em En
| MEDLINE
| ID: mdl-38230818
ABSTRACT
Insight into effect of deuterium isotopes on organic near-IR (NIR) emitters was explored by the use of self-assembled Pt(II) complexes H-3-f and HPh-3-f, and their deuterated analogues D-3-f and DPh-3-f, respectively (Schemeâ
2). In vacuum deposited thin film, albeit having nearly identical emission spectral feature maximized at ~810â
nm, H-3-f and D-3-f exhibit remarkable difference in photoluminescence quantum yield (PLQY) of 29 % and 50 %, respectively. Distinction in PLQY is also observed for HPh-3-f (800â
nm, 50 %) and DPh-3-f (798â
nm, 67 %). We then elucidated the theoretical differences in the impact on near-infrared (NIR) luminescence between Pt(II) complexes and organic small molecules upon deuteration. The results establish a general guideline for the deuteration on NIR emission efficiency. From a perspective of practical application, NIR OLEDs based on D-3-f and DPh-3-f emitters attain EQEmax of 15.5 % (radiance 31,287â
mW Sr-1 m-2 ) and 16.6 % (radiance of 32,279â
mW Sr-1 m-2 ) at 764â
nm and 796â
nm, respectively, both of which set new records for NIR OLEDs of >750â
nm.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Guideline
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article