Results 131 to 140 of about 40,474 (283)

Phosphorescent Platinum(II) Complexes With Diazinedipyrrolide Pincer Ligands: Structure and Photophysical Properties

open access: yesEuropean Journal of Inorganic Chemistry, EarlyView.
A new family of phosphorescent Pt(II) complexes with pyrimidinedipyrrolide ligands, including a pyrazine analog, was designed and synthesized. Their emission properties can be finely tuned via ligand modification, revealing strong phosphorescence originating from intraligand charge transfer transitions.
Marcela Horáková   +7 more
wiley   +1 more source

Photoinduced Solution‐Stable Radicals via Intramolecular Charge Separation From anti‐Kasha Emissive BN‐Azepines

open access: yesElectron, EarlyView.
A series of BN‐azepines with a twisted heptagonal B–N donor–acceptor framework was synthesized, enabling stable photoinduced radicals in solution. Upon photoexcitation, charge separation between the triarylamine donor and boron acceptor yields a longer‐lived triplet state, which can generate a nitrogen radical cation through electron transfer.
Lingjuan Chen   +3 more
wiley   +1 more source

Blue‐hazard‐free single‐emissive‐layer white organic LEDs based on an anti‐quenching narrowband blue emitter

open access: yesFlexMat, EarlyView.
A blue‐hazard‐free single‐emissive‐layer white OLED is realized using an anti‐quenching multiple‐resonance TADF emitter, BNCT. By integrating a sterically protected MR core with efficient energy transfer capability, BNCT enables warm‐white emission with high efficiency, negligible hazardous blue photons, and a simplified device architecture for next ...
Xiao‐Long Liu   +9 more
wiley   +1 more source

Thermally activated delayed fluorescence exciplex sensitizers with fast reverse intersystem crossing for improving efficiency stability of organic light‐emitting diodes based on multi‐resonance emitters

open access: yesFlexMat, EarlyView.
Two exciplex emitters are constructed based on a host‐guest doping strategy, and their exciton dynamics processes are investigated in depth. High‐performance OLEDs are fabricated by employing these exciplexes as emitters or sensitizers, providing excellent electroluminescence efficiencies and low efficiency roll‐offs.
Jingwen Xu   +4 more
wiley   +1 more source

Flexible white thermally activated delayed fluorescence polymer with alkyl spacer and side‐chain encapsulation for efficient solution‐processed white organic light‐emitting diodes

open access: yesFlexMat, EarlyView.
A “gemstone‐necklace” FASCE strategy synthesizes single‐component white polymers (PTF‐Qx) by alternating rigid TADF units with flexible alkyl chains. The non‐doped rigid device achieves a high EQE of 15.66% with stable white emission (CIE: 0.36, 0.46).
Wenhao Zhang   +7 more
wiley   +1 more source

Spirobifluorene fusion in multiple resonance frameworks enables efficient pure‐red OLEDs with narrowband emission and suppressed efficiency roll‐off

open access: yesFlexMat, EarlyView.
An orthogonal spirobifluorene‐fusion strategy is introduced for B/N/O‐alternated MR frameworks, enabling improved kRISC (5.46 × 103 s−1), high ΦPL (97%), and narrow‐band pure‐red emission. Vacuum‐evaporated OLEDs incorporating this emitter achieve an EQEmax >40% (FWHM = 36 nm) and exhibit exceptionally low efficiency roll‐off at high luminance ...
Yan‐Yun Jing   +7 more
wiley   +1 more source

Flexible organic room‐temperature phosphorescent materials

open access: yesFlexMat, EarlyView.
This review highlights recent advances in flexible organic room‐temperature phosphorescent (RTP) materials, covering both organic crystal and polymer systems. It discusses strategies to overcome the inherent rigidity and enhance the mechanical flexibility of organic RTP materials, aiming to enable their practical applications in anti‐counterfeiting ...
Bolun Zhang   +6 more
wiley   +1 more source

Heteroatom location‐ and orientation mode‐dependent reverse intersystem crossing rate in multiple resonance emitters

open access: yesFlexMat, EarlyView.
By constructing two pairs of isomers with different heteroatom anchoring positions, the relationship between heteroatom location and orientation mode and reverse intersystem crossing rate constant (kRISC) in multiple resonance (MR) emitters is systematically investigated.
Tingting Huang   +5 more
wiley   +1 more source

Chiral supramolecular electronics for high‐efficiency circularly polarized organic light‐emitting diodes

open access: yesFlexMat, EarlyView.
This perspective highlights supramolecular strategy for achieving band‐level chirality in vacuum‐deposited triazatruxene thin films, enabling circularly polarized organic light‐emitting diodes (OLEDs) with both high dissymmetry factor and external quantum efficiency, thereby overcoming the longstanding efficiency‐dissymmetry trade‐off in circularly ...
Xiang‐Chun Li   +3 more
wiley   +1 more source

o‐Carborane‐based multi‐resonance thermally activated delayed fluorescence emitter exhibits highly efficient and multifunctional electroluminescence

open access: yesFlexMat, EarlyView.
By strategically incorporating boron/nitrogen multi‐resonance (B/N‐MR) core into the o‐carborane unit, perfect exciton utilization can be achieved as well as exhibiting stimuli‐responsive properties. The resulting DBN‐oCb‐based organic light‐emitting diode (OLED) demonstrated an impressive external quantum efficiency of 22.3%, the highest reported for ...
Jiasen Zhang   +8 more
wiley   +1 more source

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