Abstract Simultaneously obtaining high efficiency and deep blue emission in organic light emitting diodes (OLEDs) remains a challenge. To overcome the demands associated with thermally activated delayed fluorescence (TADF) emitters, two TADF materials namely, DBA–BFICz DBA–BTICz, are designed synthesized by incorporating oxygen‐bridged boron (DBA) acceptor heteroatoms, oxygen sulphur‐based donors, BFICz BTICz, respectively. Both show photoluminescence emissions below 450 nm enhancing optical...

Abstract Two new orange–red thermally activated delayed fluorescence (TADF) materials, PzTDBA and PzDBA, are reported. These materials designed based on the acceptor–donor–acceptor (A–D–A) configuration, containing rigid boron acceptors dihydrophenazine donor moieties. exhibit a small Δ E ST of 0.05–0.06 eV, photoluminescence quantum yield (PLQY) as high near unity, short exciton lifetime (τ d ) less than 2.63 µs in 5 wt% doped film. Further, these show reverse intersystem crossing rate ( k...

The hyperfluorescence (HF) system has drawn great attention in display technology. However, the energy loss mechanism by low reverse intersystem crossing rate (k

Abstract In the field of organic light‐emitting diodes, organo‐boron based thermally activated delayed fluorescence (TADF) emitters have witnessed outstanding achievements. However, it is still challenging to achieve pure blue color (CIE y < 0.20) along with high efficiencies. To overcome these hurdles, hyperfluorescence (HF) system suggests a key strategy for future display applications. Here, two TADF host materials, p MDBA‐DI and m MDBA‐DI, multi‐resonance type tert‐butyl substituted...

New highly efficient thermally activated delayed fluorescence (TADF) dopant materials (PXB-DI and PXB-mIC) for blue organic light-emitting diodes are reported. These were designed by combining conjugated rigid ring donor moieties a boron acceptor with twisted configuration to have high TADF performance minimized self-quenching properties. In addition, new triplet energy hole transport-type host material,...

Abstract Thermally activated delayed fluorescence (TADF) materials have emerged as an efficient emitter for achieving high efficiency of blue organic light emitting diodes (OLEDs). However, it is challenging to satisfy both device and long operational lifetime together. Here, highly electrochemically stable TADF emitter, 5‐(5,9‐dioxa‐13b‐boranaphtho[3,2,1‐de]anthracen‐7‐yl)‐10,15‐diphenyl‐10,15‐dihydro‐5H‐diindolo[3,2‐a:3′,2′‐c]carbazole (DBA‐DI) designed synthesized OLED. This exhibits...

Deep-blue triplet emitters remain far inferior to standard red and green in terms of exhibiting high-color-purity Commission International de l'Éclairage (CIE) y values ≤0.1, external quantum efficiencies (EQEs), high electroluminescent brightnesses phosphorescent organic light-emitting diodes. In fact, no deep-blue emitter with color purity device performance has previously been reported. this study, a emitter, mer-tris(N-phenyl, N-benzyl-pyridoimidazol-2-yl)iridium(III) (mer-Ir1) is...

A red fluorescent material, 1,3,7,9-tetrakis(4-(tert-butyl)phenyl)-5,5-difluoro-10-(2-methoxyphenyl)-5H-4l4,5l4-dipyrrolo[1,2-c:2′,1′-f][1,3,2]diazaborinine (4tBuMB), as an emitting dopant in a thermally activated delayed fluorescence (TADF) sensitized hyperfluorescence organic light-emitting diode (HFOLED) is reported. The 4tBuMB shows high photoluminescence quantum yield (PLQY) of 99% with emission maximum at 620 nm and full width half-maximum (fwhm) 31 solution. Further, it deep lowest...

The novel carbazole-based multiresonance types of thermally activated delayed fluorescence (MR-TADF) emitters mICz-DABNA and BFCz-DABNA are reported, their spectroscopic properties investigated with the inductive effect on central nitrogen atom for pure deep blue emission. With introduction electron-donating/-withdrawing substituents, exhibited bathochromic/hypsochromic shifted emission, respectively, compared to simple MR-TADF. Moreover, spectral bandwidths became narrower. Theoretical...

White organic light-emitting diodes (WOLEDs) with high efficiencies and tunable colors attracts considerable interest from the industry academia. Thermally activated delayed-fluorescence (TADF) emitters can revolutionize such WOLED devices; however, they still suffer poor performances. In this study, an advanced double-emissive-layer device architecture capable of hole-trapping TADF-sensitized emissions is proposed to not only achieve a recombination zone shift for but also accelerate...

Abstract Developing boron‐based emitters in red region with a narrow band spectrum is crucial and challenging for optoelectronic applications. Herein the authors report novel reasonable multiple resonance (MR) effect by utilizing CC bond type connection instead of conventional CN bond. The designed BP‐2DPA DBP‐4DPA exhibit narrowband pure emissions photoluminescence (PL) maxima 599, 605 nm full width half maximum (FWHM) 34 high PL quantum yield 91.3, 96.4%, respectively. Moreover, compared...

Two new blue TADF emitters, <bold>3CzTB</bold> and <bold>M3CzB</bold>, for application in highly efficient organic light-emitting diodes are reported.

Two thermally activated delayed fluorescence (TADF) emitters with high synthetic yields were designed and synthesized.

Abstract To date, thermally activated delayed fluorescence‐sensitized fluorescent organic light‐emitting diodes (TSF‐OLEDs) have undergone substantial research to achieve high efficiency and good operational stability in wide color gamut regions. Usually, a highly efficient TSF device, the Förster resonance energy transfer rate ( k FRET ) should be enhanced, whereas Dexter DET suppressed. Even though devices are achieved all RGB regions by satisfying BT2020 requirements, achieving long...

Abstract Dopamine acting through D2 receptors (D2Rs) controls lactotroph proliferation and prolactin (PRL) levels. Ablation of this receptor in mice results hyperplasia prolactinomas aged females. Alternative splicing the Drd2 gene generates 2 independent isoforms, a long (D2L) short (D2S) isoform, which are present all D2R-expressing cells. Here, we addressed role D2L D2S on physiology generation analysis D2S-null their comparison with D2L-null animals. These represent valuable tool to...

For surveilling human health, industries, and the environment, pH monitoring is important. Numerous studies on fluorescent probes have been conducted to monitor various ranges. However, that are capable of sensing alkaline regions rare. In this study, we propose turn-on-type for detecting pHs using bis[2-(2'-hydroxyphenyl)benzazole] (bis(HBX)) derivatives. These high pKa values (from 9.7 10.8) exhibit strong fluorescence intensity color changes at pHs. Probes derived from bis(HBX) good...

Two novel, CN-substituted <italic>ortho</italic>-terphenyl (OTP) core based bipolar type host materials were designed and synthesized for application in blue thermally activated delayed fluorescence (TADF) devices.

We report a transmittance controllable electrochromic color filter (TCECF) by incorporating new leuco dyes and their optimized composition. Each primary red (R), green (G), blue (B) has an excellent of more than 84% at 650 nm, 540 450 the coordinates are from white (0.332, 0.347) to deep-red (0.621, 0.344), deep-green (0.327, 0.646), deep-blue (0.179, 0.085), respectively. Also, each TCECF good coloration efficiencies 188.7 cm2 C-1 189.3 147.8 with high optical density change. A full...