SCHEDULED MAINTENANCE
Synthesis and structure design of I–III–VI quantum dots for white light-emitting diodes
The synthesis and structural design of I–III–VI quantum dots are summarized and WLED applications are highlighted. The routes to improve the performance of WLED devices and the challenges of design optimization and practical application are discussed.
Thermally activated delayed fluorescence dendrimers achieving 20% external quantum efficiency for solution-processed OLEDs
TADF dendrimers with a D–A–D structure, with multi-carbazole as the donor and di(pyridine-3-yl)methanone as the acceptor, are synthesized and their solution-processed OLEDs achieved a CEmax of 52.6 vs. 27.0 cd A−1 and an EQEmax of 20.4% vs. 9.2%.
Highly efficient thermally activated delayed fluorescence emitter based on the 5H-benzo[d]benzo[4,5]imidazo[1,2-a]imidazole donor
A donor–π-acceptor-type TADF emitter (BzITz) was designed and synthesized using 5H-benzo[d]benzo[4,5]imidazo[1,2-a]imidazole as a fused rigid electron donor and a benzonitrile merged triazine unit as an electron acceptor.
An efficient solution-processable non-doped hybridized local and charge-transfer (HLCT) emitter for a simplified organic light-emitting diode
A solution-processable HLCT fluorescent molecule realizes a highly efficient non-doped OLED with a high brightness of 30 800 cd m−2, a maximum external quantum efficiency (EQEmax) of 6.74% and a maximum current efficiency (CEmax) of 14.38 cd A−1.
A large-scale deep-blue tetraphenylbenzene-bridged hybridized local and charge transfer fluorophore exhibiting small efficiency roll-off and low amplified spontaneous emission threshold
A deep-blue HLCT emitter PTPC achieved a high EQE of 6.78% in a non-doped OLED as well as a low ASE threshold of 1.18 μJ cm−2.
Research Article
Spiro-configured dibenzosuberene compounds as deep-blue emitters for organic light-emitting diodes with a CIEy of 0.04
Deep blue electroluminescence is highly required for organic light-emitting diode (OLED) technology. We report, in this work, blue emitting fluorophores for OLED with low CIEy.
Highly emissive and color-tunable copper-based halide composites for bright white light-emitting diodes
The blue-emissive Cs3Cu2I5, yellow-emissive CsCu2I3, and white-emissive Cs3Cu2I5@CsCu2I3 composites have been obtained by a one-step microwave method. The three UV-pumped WLEDs are fabricated by using the composites, and a CRI of 92 is achieved.
Efficient red organic LEDs via the combination of an exciplex host and micro-cavity
We report a current efficiency of 99.7 cd A−1 for a red OLED with an electroluminescence (EL) peak at 604 nm (full width at half maximum of 32 nm).
Isomeric thermally activated delayed fluorescence emitters based on a quinolino[3,2,1-de]acridine-5,9-dione multiple resonance core and carbazole substituent
The color purity of the pixels is an essential indicator in organic light-emitting diode (OLED) commercial displays.
New aggregation-induced delayed fluorescent materials for efficient OLEDs with high stabilities of emission color and efficiency
New aggregation-induced delayed fluorescence luminogens are developed, which exhibit high electroluminescence efficiencies, very small efficiency roll-offs and high emission color stability.
A meta-linkage strategy towards high-performance hosts for efficient blue thermally activated delayed fluorescence OLEDs
The development of high-performance host materials for blue thermally activated delayed fluorescence (TADF) emitters is crucial for realizing efficient blue organic light-emitting diodes (OLEDs).
Spirobifluorene modified electron transport materials for high efficiency in phosphorescent organic light-emitting diodes
Spirobifluorene modified materials developed as electron transport layers lowered device driving voltage, enhanced quantum efficiency, and more than doubled the lifetime of green phosphorescent organic light-emitting diodes.
Synthesis of broadband NIR garnet phosphor Ca4ZrGe3O12: Cr3+, Yb3+ for NIR pc-LED applications
The emission mechanism and origin of the host and Cr3+/Yb3+ co-doped Ca4ZrGe3O12.
Chemistry Frontiers
Are pure hydrocarbons the future of host materials for blue phosphorescent organic light-emitting diodes?
This Chemistry Frontiers deals with a new generation of host materials for phosphorescent OLEDs only constituted with carbon and hydrogen atoms, which can be beneficial for the future development of the OLED industry.
About this collection
Materials Chemistry Frontiers is delighted to introduce you the following collection of articles on “Light-emitting Technologies”. Articles featured in our focus collections are handpicked by Editors. We hope you find them enjoyable to read. Access is free till November 30th, 2022.