Perovskite
quantum dots (PeQDs) have been regarded as an alternative
to traditional phosphor color converters in the backlit display to
improve the color gamut and rendition of LCD. However, the pending
barriers of aggregation quenching and structure instability are hindering
their practical applications. Herein, high-quality CsPbX3 (X = Br, Br/I) PeQDs were in situ precipitated inside glass to produce
nanocomposites with superior optical performance and stability. The
highest photoluminescence quantum yield (PLQY) of ∼100% for
CsPbBr3@glass is ascribed to the elimination of the inner
filter effect via a physical dilution approach to restore its apparent
value to an intrinsic one, and the exceptional photostability and
water/heat resistance are benefited from their effective isolation
from the external environment by the surrounding glass network units.
Employing the PeQDs@glass@PDMS monolithic film, a high-performance
backlit LCD was designed, and its color gamut reached 152% of commercial
LCD and 103% of NTSC, demonstrating a great potential in the optoelectronic
industry.
Highly luminescent glass-stabilized CsPbX3 (X = Cl, Br, I) perovskite QDs are fabricated via an in situ glass crystallization strategy and fluorine doping.
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