Doping Copper(I) in Ag7 Cluster for Circularly Polarized OLEDs with External Quantum Efficiency of 26.7% DOI Open Access
Xing-zhao Ding,

Lin‐Xi Shi,

Jin‐Yun Wang

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 4, 2024

Abstract Hetero‐metal doping or substitution to create alloy clusters is a highly appealing strategy for improving physicochemical characteristics as well tailoring optical and electronic properties, although high‐yield synthesis of with precise positioning doped metals daunting challenge. Herein, we manifest rational chiral cluster enantiomers R / S ‐Ag 6 Cu in 85 %–87 % yield by replacing one Ag(I) atom Cu(I) homometallic 7 , achieving circularly polarized luminescence (CPL) quantum beyond 90 %. As small energy gap (ca. 0.07 eV) between 1 T states facilitates thermally activated delay fluorescence (TADF) through reverse intersystem crossing (RISC), the photoluminescence (PL) at ambient temperature originates mostly from TADF (85 86 %) place phosphorescence (15 14 %). Relative those copper(I) not only triples PL yields due accelerating ISC (intersystem crossing) RISC, but also doubles CPL asymmetry factors ascribed rigidizing structure stronger Ag−Cu interaction apart dramatically thermodynamic stability. Solution‐processable organic light‐emitting diodes (CP‐OLEDs) demonstrate high‐efficiency electroluminescence (CPEL) external efficiency (EQE) 26.7 %, which superior most red‐emitting OLEDs solution process.

Language: Английский

Chiral Copper(I) Iodide Cluster Hybrids Enabling Highly Efficient Circularly Polarized Electroluminescence DOI Open Access
Hao Zeng,

Jin‐Yun Wang,

Liang‐Jin Xu

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 16, 2025

Abstract While the emergence of copper(I)‐iodide cluster hybrid materials as potential substitutes for toxic lead halides in electroluminescence applications represents a major advancement, efficiency still needs improvement and fact circularly polarized (CPEL) remains largely unexplored. In this work, design chiral phosphine ligands is dedicated to attaining strongly luminescent materials, thus achieving high‐efficiency CPEL through host‐guest doping strategy. The hybrids exhibit intense yellow emission peaked at 567 nm with notable luminescence (CPL). Doping films comprising 30% 1,3‐bis(N‐carbazolyl)benzene (mCP), 2,6‐bis(3‐(9H‐carbazol‐9‐yl)phenyl)pyridine (2,6‐DCZPPY), 40% Cu 2 I demonstrated excellent CPL quantum yield (PLQY) exceeding 80% low surface roughness 0.358 nm. Based on this, electrically driven light‐emitting diodes (LEDs) dissymmetry factor ( g EL ) 1.36×10 −3 peak external (EQE) 20.5% are successfully developed. Notably, work not only first demonstration Cu(I) halide clusters but also provides one top device efficiencies non‐lead metal materials.

Language: Английский

Citations

1
Efficient Orange Light-Emitting Diodes from Nontoxic Organic–Inorganic Hybrid Copper Halides Enabled by Nonionic Surfactant Chemisorption DOI
Zhuangzhuang Ma,

Shuailing Lin,

Xinzhen Ji

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 27, 2025

Ternary copper halides with an eco-friendly property have emerged as attractive candidates to replace toxic lead-containing perovskites for light-emitting diodes (LEDs), yet achieving long-wavelength electroluminescence remains unexplored. Herein, we report the first realization of orange-emitting LEDs (595 nm) based on nontoxic organic-inorganic PEA4Cu4I4 (PEA = β-phenylethylamine) films enabled by a nonionic surfactant poly(propylene glycol) bis(2-aminopropyl ether) (APPG) chemisorption. Experimental and theoretical analyses rationalize that APPG additive has strong chemisorption Cu-I framework within grain boundaries films, which not only improves film's morphology but also passivates iodine vacancy defects. Moreover, can raise ionization energy increase carrier mobility thereby balancing charge transport. Consequently, achieve orange made from APPG-treated showing external quantum efficiency 1.21%, operational stability treated device is greatly prolonged, resulting suppressed ion migration.

Language: Английский

Citations

0
Bidentate Lewis Base Ligand-Mediated Surface Stabilization and Modulation of the Electronic Structure of CsPbBr3 Perovskite Nanocrystals DOI
Md. Samim Hassan, Pooja Basera, Bilawal Khan

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 147(1), P. 862 - 873

Published: Dec. 20, 2024

The desorption of conventional ligands from the surface halide perovskite nanocrystals (NCs) often causes their structural instability and deterioration optoelectronic properties. To address this challenge, we present an approach using a bidentate Lewis base ligand, namely, 1,4-bis(diphenylphosphino)butane (DBPP), for synthesis CsPbBr3 NCs. phosphine group DBPP has strong interaction with PbBr2 precursor, forming highly crystalline intermediate complex during reaction. In presence oleic acid, uncoordinated is converted into phosphonium cation, which strongly binds to bromide formed NCs through hydrogen bonding. Density functional theory calculations suggest that can bind undercoordinated lead ions its unprotonated protonated groups, respectively. robust binding helps preserve integrity under various environmental stresses. Moreover, electron density energy levels are regulated in DBPP-capped by donation electrons NCs, resulting improved photocatalytic CO2 reduction performance. Our study highlights potential stabilize modulate optical electronic

Language: Английский

Citations

2
Doping Copper(I) in Ag7 Cluster for Circularly Polarized OLEDs with External Quantum Efficiency of 26.7% DOI
Xiaoyan Ding,

Lin‐Xi Shi,

Jin‐Yun Wang

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 4, 2024

Hetero-metal doping or substitution to create alloy clusters is a highly appealing strategy for improving physicochemical characteristics as well tailoring optical and electronic properties, although high-yield synthesis of with precise positioning doped metals daunting challenge. Herein, we manifest rational chiral cluster enantiomers R/S-Ag

Language: Английский

Citations

1
Cuprous-Based Layered Single-Crystalline Scintillators for X-ray Detection and Imaging DOI
Y. F. Zhao, Danping Chen, Haitao Tang

et al.

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(43), P. 17587 - 17594

Published: Jan. 1, 2024

A new metal halide single crystal (C 6 H 10 N 2 ) Cu I 3 (PO was demonstrated. The optical and X-ray properties of were fully characterized evaluated, which demonstrated great potential for detection imaging.

Language: Английский

Citations

0
Enhanced piezo-response of mixed-cation copper perovskites with Cl/Br halide engineering DOI Creative Commons
Amr Elattar,

Christopher Munoz,

Libor Kobera

et al.

Materials Advances, Journal Year: 2024, Volume and Issue: 5(22), P. 8953 - 8960

Published: Jan. 1, 2024

Structural modulation of (Cs/MA) mixed-cation copper perovskite via (Cl/Br) mixed-halide engineering led to enhancement the piezoelectric response.

Language: Английский

Citations

0
Emergent updates and future directions on white light emitting diodes based on luminous lead-free halide perovskites DOI
Prashant Kumar, Manish Kumar, Dharm Veer Singh

et al.

Materials Letters, Journal Year: 2024, Volume and Issue: 379, P. 137671 - 137671

Published: Nov. 6, 2024

Language: Английский

Citations

0
Rational Design of Single‐Component White‐Light Emissive Molecular Copper Clusters DOI Creative Commons

Alain Rocheteau,

Lanig Lemeur,

Marie Cordier

et al.

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 13(2)

Published: Nov. 21, 2024

Abstract The development of low‐cost and earth‐abundant phosphors for substituting expensive noble metals toxic lead materials is currently major importance sustainable solid‐state lighting technologies. Hybrid copper halide are receiving considerable attention due to their unique diverse structural photophysical properties combined low cost toxicity. This article reports the rational design iodide compounds developing single‐component white light emitters. By a ligand engineering strategy, energy layout molecular clusters can be adjusted variation in relative intensity two emission bands obtained, enabling emitted. Temperature dependence this dual‐emission feature also allows high contrast luminescence thermochromism. Thanks good solubility properties, studied have been successfully incorporated within organic polymer leading with processability suitable application development. Therefore, potential applicability these composite has demonstrated various fields as ratiometric thermometry, emitters phosphor‐converted white‐light emitting diodes, ink anticounterfeiting properties. study highlights power strategy develop multifunctional based on light‐emitting materials.

Language: Английский

Citations

0
Doping Copper(I) in Ag7 Cluster for Circularly Polarized OLEDs with External Quantum Efficiency of 26.7% DOI Open Access
Xing-zhao Ding,

Lin‐Xi Shi,

Jin‐Yun Wang

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 4, 2024

Abstract Hetero‐metal doping or substitution to create alloy clusters is a highly appealing strategy for improving physicochemical characteristics as well tailoring optical and electronic properties, although high‐yield synthesis of with precise positioning doped metals daunting challenge. Herein, we manifest rational chiral cluster enantiomers R / S ‐Ag 6 Cu in 85 %–87 % yield by replacing one Ag(I) atom Cu(I) homometallic 7 , achieving circularly polarized luminescence (CPL) quantum beyond 90 %. As small energy gap (ca. 0.07 eV) between 1 T states facilitates thermally activated delay fluorescence (TADF) through reverse intersystem crossing (RISC), the photoluminescence (PL) at ambient temperature originates mostly from TADF (85 86 %) place phosphorescence (15 14 %). Relative those copper(I) not only triples PL yields due accelerating ISC (intersystem crossing) RISC, but also doubles CPL asymmetry factors ascribed rigidizing structure stronger Ag−Cu interaction apart dramatically thermodynamic stability. Solution‐processable organic light‐emitting diodes (CP‐OLEDs) demonstrate high‐efficiency electroluminescence (CPEL) external efficiency (EQE) 26.7 %, which superior most red‐emitting OLEDs solution process.

Language: Английский

Citations

0