High‐Performance Narrowband Pure‐Green OLEDs with Gamut Approaching BT.2020 Standard: Deuteration Promotes Device Efficiency and Lifetime Simultaneously DOI Open Access
Jiahui Liu, Xiaojun Yin,

Manli Huang

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 26, 2024

In order to fulfill the demand for ultrahigh definition organic light-emitting diodes (OLEDs), pure-green emitters with Commission Internationale de l'Éclairage (CIE) y-coordinate over 0.71 are in urgent demand. Meanwhile, high device efficiency, small efficiency roll-off, and operational lifetime also remain challenging issues. this work, a series of narrowband fluorescent based on double-boron (B) doped polycyclic aromatic hydrocarbons (PAHs) framework fused naphthalene units is reported. The newly designed realize green emission peaks 512-521 nm extremely narrow full-width at half-maxima (FWHMs) 16-17 toluene solution. Utilizing these phosphor-sensitized fluorescence (PSF) system, resulting OLEDs exhibit pure range 514-526 very FWHMs 19-20 nm. Notably, devices partially deuterated emitter, DBN-NaPh-d, not only achieve maximum external quantum (EQE

Language: Английский

Paper and Pencil Design of Color-Pure Organic Emitters: The Curious Case of Xanthene Dyes DOI

Morteza Eskandari,

Liangxuan Wang, Begoña Milián‐Medina

et al.

The Journal of Physical Chemistry A, Journal Year: 2025, Volume and Issue: 129(6), P. 1599 - 1608

Published: Jan. 31, 2025

The quest for color-pure emitters multicolor bioimaging as well ultrahigh definition organic light-emitting diodes demands facile design concepts to avoid tedious synthetic or computational trial-and-error procedures. We have recently presented a simple recipe construct blue emitters, which combines basic resonance structure and frontier molecular orbital treatments; this applies multiresonant type allows enlarge the chemical space toward novel structural motifs. In current work, we show that such fundamental considerations further apply structurally entirely different family of xanthene dyes. Opposite related polymethine dye with small bond length alternation (BLA) in ground excited state (S0, S1), however, dyes display large BLA S0 S1, so overall change BLA, ΔBL, is small. This gives equally rise emission; underlying reasons curious behavior are carved out study. generalization fact constitutes desired "paper pencil" strategy, spanning now whole visible range.

Language: Английский

Citations

0
Comprehensive Review on the Structural Diversity and Versatility of Multi-Resonance Fluorescence Emitters: Advance, Challenges, and Prospects toward OLEDs DOI Creative Commons
Xiugang Wu,

Songqian Ni,

Chih‐Hsing Wang

et al.

Chemical Reviews, Journal Year: 2025, Volume and Issue: unknown

Published: May 9, 2025

Fluorescence emitters with a multiple-resonant (MR) effect have become research hotspot. These MR mainly consist of polycyclic aromatic hydrocarbons boron/nitrogen, nitrogen/carbonyl, and indolocarbazole frameworks. The staggered arrangement the highest occupied molecular orbital lowest unoccupied facilitates MR, resulting in smaller internal reorganization energy narrower emission bandwidth. Optimal charge separation suppresses gap between singlet triplet excited states, favoring thermally activated delayed fluorescence (TADF). MR-TADF materials, due to color purity high efficiency, are excellent candidates for organic light-emitting diodes. Nevertheless, significant challenges remain; particular, limitation imposed by alternated core configuration hinders their diversity versatility. Most existing materials concentrated blue-green range, only few red near-infrared spectra. This review provides timely comprehensive screening from pioneering work present. Our goal is gain understandings structure-performance relationship both basic advanced perspectives. Special emphasis placed on exploring correlations chemical structure, photophysical properties electroluminescent performance depth breadth an aim promote future development emitters.

Language: Английский

Citations

0
Synthesis and Optical Properties of Near‐Ultraviolet‐Emissive B─O‐Containing Azaborines DOI

Peiyuan Yang,

Hiroko Nomura,

Masakazu Nagata

et al.

Asian Journal of Organic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: June 5, 2025

Abstract Ultraviolet (UV)‐emissive organic luminophores have attracted significant attention owing to their potential biological and industrial applications. In this study, a novel dibenzo‐1,4‐azaborine ( DBAB ) derivative 2BO2Dpa containing boron‐─oxygen bonds were synthesized. toluene, exhibited sharp violet‐blue photoluminescence centered at 399 nm, with full width half maximum of 17 nm. Furthermore, light‐emitting diodes based on blue‐violet electroluminescence 404 demonstrating for application as near‐UV emitters.

Language: Английский

Citations

0
High‐Performance Narrowband Pure‐Green OLEDs with Gamut Approaching BT.2020 Standard: Deuteration Promotes Device Efficiency and Lifetime Simultaneously DOI Open Access
Jiahui Liu, Xiaojun Yin,

Manli Huang

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 26, 2024

In order to fulfill the demand for ultrahigh definition organic light-emitting diodes (OLEDs), pure-green emitters with Commission Internationale de l'Éclairage (CIE) y-coordinate over 0.71 are in urgent demand. Meanwhile, high device efficiency, small efficiency roll-off, and operational lifetime also remain challenging issues. this work, a series of narrowband fluorescent based on double-boron (B) doped polycyclic aromatic hydrocarbons (PAHs) framework fused naphthalene units is reported. The newly designed realize green emission peaks 512-521 nm extremely narrow full-width at half-maxima (FWHMs) 16-17 toluene solution. Utilizing these phosphor-sensitized fluorescence (PSF) system, resulting OLEDs exhibit pure range 514-526 very FWHMs 19-20 nm. Notably, devices partially deuterated emitter, DBN-NaPh-d, not only achieve maximum external quantum (EQE

Language: Английский

Citations

3