High‐Performance Orange–Red Organic Light‐Emitting Diodes with External Quantum Efficiencies Reaching 33.5% based on Carbonyl‐Containing Delayed Fluorescence Molecules DOI Creative Commons
Ruming Jiang, Xing Wu, Hao Liu

et al.

Advanced Science, Journal Year: 2021, Volume and Issue: 9(3)

Published: Dec. 19, 2021

Abstract Developing orange to red purely organic luminescent materials having external quantum efficiencies ( η ext s) exceeding 30% is challenging because it generally requires strong intramolecular charge transfer, efficient reverse intersystem crossing (RISC), high photoluminescence yield Φ PL ), and large optical outcoupling efficiency out ) simultaneously. Herein, by introducing benzoyl dibenzo[ a , c ]phenazine acceptor, stronger electron ]phenazin‐11‐yl(phenyl)methanone, created employed for constructing orange–red delayed fluorescence molecules with various acridine‐based donors. The incorporation of leads red‐shifted accelerated RISC, reduced lifetimes, increased s, the adoption spiro‐structured acridine donors promotes horizontal dipole orientation thus renders s. Consequently, state‐of‐the‐art light‐emitting diodes are achieved, providing record‐high electroluminescence (EL) 33.5%, 95.3 cd A −1 93.5 lm W ‒1 . By referring control molecule without benzoyl, demonstrated that presence can exert significant positive effect over improving enhancing EL efficiencies, which be feasible design robust materials.

Language: Английский

Recent advances in the design of afterglow materials: mechanisms, structural regulation strategies and applications DOI
Xin Yang, Geoffrey I. N. Waterhouse, Siyu Lu

et al.

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(22), P. 8005 - 8058

Published: Jan. 1, 2023

Afterglow materials have attracted widespread attention owing to their distinctive and long-lived optical emission properties which create exciting opportunities in various fields.

Language: Английский

Citations

168
NIR TADF emitters and OLEDs: challenges, progress, and perspectives DOI Creative Commons
Yuxin Xiao, Hailan Wang, Zongliang Xie

et al.

Chemical Science, Journal Year: 2022, Volume and Issue: 13(31), P. 8906 - 8923

Published: Jan. 1, 2022

Near-infrared (NIR) light-emitting materials show excellent potential applications in the fields of military technology, bioimaging, optical communication, organic diodes (OLEDs),

Language: Английский

Citations

121
A Highly Twisted Carbazole‐Fused DABNA Derivative as an Orange‐Red TADF Emitter for OLEDs with Nearly 40 % EQE DOI Open Access

Ying‐Chun Cheng,

Xiao‐Chun Fan, Feng Huang

et al.

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(47)

Published: Sept. 28, 2022

Multiple resonance (MR) type thermally activated delayed fluorescence (TADF) material is currently a research hotspot in organic light-emitting diodes (OLEDs) due to their high color purity and exciton utilization. However, there are only handful of MR-TADF emitters with emissions beyond the blue-to-green region. The very limited emission colors for mainly caused by fact that so far molecular modifications do not offer much change colors. Here, we report new approach modifying prototypical MR core DABNA fusing carbazoles framework. carbazole-fused molecule (TCZ-F-DABNA) basically maintains MR-dominated features while red-shifting emission. Its OLED achieves an external quantum efficiency 39.2 % peak at 588 nm, which record-high OLEDs peaks 560 nm. This work provides significantly tunning emitters.

Language: Английский

Citations

105
Highly efficient hybridized local and Charge-transfer (HLCT) Deep-blue electroluminescence with excellent molecular horizontal orientation DOI

Shengbing Xiao,

Ying Gao, Runze Wang

et al.

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 440, P. 135911 - 135911

Published: March 21, 2022

Language: Английский

Citations

88
RGB Thermally Activated Delayed Fluorescence Emitters for Organic Light‐Emitting Diodes toward Realizing the BT.2020 Standard DOI Creative Commons
Xiao‐Chun Fan,

Xiaoyao Hao,

Feng Huang

et al.

Advanced Science, Journal Year: 2023, Volume and Issue: 10(28)

Published: Aug. 16, 2023

Abstract With the surging demand for ultra‐high‐resolution displays, International Telecommunication Union (ITU) announce next‐generation color gamut standard, named ITU‐R Recommendation BT.2020, which not only sets a seductive but challenging milestone display technologies also urges researchers to recognize importance of coordinates. Organic light‐emitting diodes (OLEDs) are an important technology in current daily life, they face challenges approaching BT.2020 standard. Thermally activated delayed fluorescence (TADF) emitters have bright prospects OLEDs because possess 100% theoretical exciton utilization. Thus, development TADF emitting primary red (R), green and blue (B) emission is great significance. Here, comprehensive overview latest advancements that exhibit Commission Internationale de l'Éclairage (CIE) coordinates surpassing National Television System Committee (NTSC) standards presented. Rational strategies molecular designs, as well resulting photophysical properties OLED performances, discussed elucidate underlying mechanisms shifting CIE both donor‐acceptor multiple resonance (MR) typed toward Finally, realization wide‐color‐gamut standard this research area provided.

Language: Английский

Citations

69
Carbon dot-based afterglow composite with tunable room temperature phosphorescence and thermally activated delayed fluorescence and their anti-counterfeiting and encryption application DOI
Jing Hu,

Mingxiu Lei,

Lingpeng Yan

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 489, P. 151245 - 151245

Published: April 15, 2024

Language: Английский

Citations

20
The Golden Age of Thermally Activated Delayed Fluorescence Materials: Design and Exploitation DOI Creative Commons
John Marques dos Santos, David Hall, Biju Basumatary

et al.

Chemical Reviews, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 12, 2024

Since the seminal report by Adachi and co-workers in 2012, there has been a veritable explosion of interest design thermally activated delayed fluorescence (TADF) compounds, particularly as emitters for organic light-emitting diodes (OLEDs). With rapid advancements innovation materials design, efficiencies TADF OLEDs each primary color points well white devices now rival those state-of-the-art phosphorescent emitters. Beyond electroluminescent devices, compounds have also found increasing utility applications numerous related fields, from photocatalysis, to sensing, imaging beyond. Following our previous review 2017 (

Language: Английский

Citations

20
Recent Progress in Near-Infrared Organic Electroluminescent Materials DOI
Jie Zhang, Huiru Ye, Yanxian Jin

et al.

Topics in Current Chemistry, Journal Year: 2021, Volume and Issue: 380(1)

Published: Dec. 8, 2021

Language: Английский

Citations

64
Recent Advances in Structural Design of Efficient Near‐Infrared Light‐Emitting Organic Small Molecules DOI
Hae Un Kim, Taehyun Kim,

Chanhyuk Kim

et al.

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 33(1)

Published: Oct. 31, 2022

Abstract Organic light‐emitting materials in the near‐infrared (NIR) region are important to realize next‐generation lightweight and wearable applications bioimaging, photodynamic therapy, telecommunications. Inorganic organometallic expensive toxic; thus, development of purely organic is essential. However, highly efficient NIR made still its infancy. Therefore, this review outlines molecular design strategies for developing small‐molecule with high emission efficiency that can overcome energy‐gap law be applied devices. After briefly reviewing basic knowledge required molecules, representative high‐efficiency molecules reported over past 5 years classified according their core moieties, design, physical properties, luminescence characteristics analyzed. Further, perspective outlook regarding provided.

Language: Английский

Citations

63
Structure Rigidification Promoted Ultrabright Solvatochromic Fluorescent Probes for Super-Resolution Imaging of Cytosolic and Nuclear Lipid Droplets DOI

Mingyue Cao,

Ting Zhu, Mengying Zhao

et al.

Analytical Chemistry, Journal Year: 2022, Volume and Issue: 94(30), P. 10676 - 10684

Published: July 19, 2022

Lipid droplets (LDs) containing cytosolic and nuclear LDs have recently received increasing attention because of their diverse biological roles in living systems. However, developing fluorescent probes for super-resolution visualization these subcellular still remains challenging due to insufficient fluorescence brightness poor membrane permeability. Herein, we rationally synthesized a series ultrabright solvatochromic based on benzoboranils (BBAs) LD-specific imaging using structured illumination microscopy (SIM). The rigidly exhibit ultrahigh quantum yields up 99.9% low-polar solvents. They also show more significant enhancements lipid environments than commercial LD probes. Owing excellent merits, our lipophilic can specifically light at ultralow concentrations down 10 nM. Further use BBA-CF3 SIM fusion process was successfully achieved. unprecedented spatial resolution with an FWHM value 142 nm acquired. Collectively, hold tremendous potential unveil the mysterious research SIM.

Language: Английский

Citations

50