2D/3D Heterostructured Perovskites for Highly Selective Room-Temperature Blue Spin-Polarized Light-Emitting Diodes DOI Creative Commons
Jooho Moon, Gyumin Jang,

Sangjun Lee

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 31, 2024

Abstract Circularly polarized light can be utilized in numerous applications, including 3D displays and magnetic memory. In this study, pure-blue spin-polarized light-emitting diodes (spin-LEDs) were fabricated by depositing chirality-induced spin selectivity (CISS) layers—2D perovskites incorporating R/S-2-fluoromethylbenzylamine (R/S-2F-MBA) chiral cations—on top of Br/Cl mixed-halide perovskite thin films. The chiroptical properties these heterostructured significantly improved, as reflected an approximately six-fold increase circular dichroism over a conventional iodide perovskite. Density functional theory calculations indicated that the ionic radius halogen atom decreased relative to iodine, hydrogen bonding between ammonium groups cations halide anions inorganic slabs became stronger; facilitated chirality transfer from 2F-MBA amplified structural distortion. Halogen–halogen interactions contributed further transfer, improving spin-polarizability CISS layer. enhanced effect yielded spin-LEDs with circularly electroluminescence dissymmetry factor exceeding 10%. Additionally, highly polar R/S-2F-MBA effectively passivated vacancies film, boosting luminescence well external quantum efficiency. As preliminary proof concept, employed vertical-type photodetectors, enabling interactive optical wireless communication.

Language: Английский

Green Spin Light-Emitting Diodes Enabled by Perovskite Nanocrystals in Situ Modified with Chiral Ligands DOI Creative Commons
Desui Chen, Bing Tang, A. A. Sergeev

et al.

ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown, P. 815 - 821

Published: Jan. 15, 2025

Spin-polarized light-emitting diodes (spin-LEDs) hold promise for next-generation technologies across optical communication, biological imaging, and quantum information processing. Chiral metal halide perovskites, which combine advantageous optoelectronic properties with chirality, are promising materials high-performance spin-LEDs. However, such spin-LEDs still suffer from low efficiency limited brightness, as they often rely on low-dimensional chiral perovskites rather inferior charge-transport spin filter layers. Herein, we demonstrate bright efficient green based perovskite nanocrystals emitters. We employed an in situ ligand modification using R-/S-1-(4-bromophenyl)-ethylammonium bromide to imprint chirality onto CsPbBr3 nanocrystals, exhibited both a high photoluminescence yield of 89% improved relaxation lifetime. A remarkable spin-polarization 88% was observed the nanocrystal films. Consequently, our without commonly used layer simultaneously achieved maximum brightness 12,800 cd m–2, record-high peak external 15.4%, circularly polarized electroluminescence dissymmetry factor 2.16 × 10–3 at room temperature, setting new benchmarks perovskite-based

Language: Английский

Citations

2
Chiral-induced spin selectivity in electrocatalysis DOI
Sujun Zheng, Hong Chen, Shuang‐Quan Zang

et al.

Matter, Journal Year: 2025, Volume and Issue: 8(2), P. 101924 - 101924

Published: Feb. 1, 2025

Language: Английский

Citations

1
Perovskite spin light-emitting diodes with simultaneously high electroluminescence dissymmetry and high external quantum efficiency DOI Creative Commons
Shuai He, Weixi Lin,

De Yu

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: March 5, 2025

Realizing high electroluminescence dissymmetric factor and external quantum efficiency at the same time is challenging in light-emitting diodes with direct circularly polarized emission. Here, we show that can be simultaneously achieved based on chiral perovskite dots. Specifically, dots chiral-induced spin selectivity concurrently serve as localized radiative recombination centers of spin-polarized carriers for emission, thereby suppressing relaxation spins, Meanwhile, improving ligand exchange found to synergistically promote their optoelectronic properties so chiroptoelectronic performance resulting devices facilitated. Our device exhibits (R: 0.285 S: 0.251) 16.8% 16%), demonstrating potential constructing high-performance light sources.

Language: Английский

Citations

1
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
Mixed‐Ligand Chiral Quasi‐2D Perovskites for Standard and Deep Blue CP‐LEDs DOI

Xinyao Yan,

Rui Cao,

Ruxi Zhang

et al.

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

Published: Aug. 7, 2024

Abstract This study presents the development of mixed‐ligand quasi‐2D perovskites ((2‐PEA) x ( R/S ‐2‐BA) 2 MA 1 Cs Pb 3 Br 10+ , = 0.8, 1.6, 2.4) for circularly polarized light‐emitting diodes (CP‐LEDs). By utilizing strong confinement effect 2‐phenylethylammonium (2‐PEA) and chirality R / S ‐2‐butylammonium ‐2‐BA), room‐temperature luminescence (CPL) across green to deep blue spectrum is achieved. The CPL attributes transfer spin‐polarized excitons while originates from direct excitation luminescent phases with intrinsic chirality. Finally, CP‐LEDs under ambient are realized. Notably, standard CP‐EL achieved based on 0.8PEA/( ‐2‐BA)‐ 1.2PEA/( ‐2‐BA)‐films impressive electroluminescent asymmetry factors (0.122 0.175), highlighting potential chiral in opening avenues full‐color display.

Language: Английский

Citations

6
Chiral Quasi‐2D Perovskites Based Single Junction Spin‐Light‐Emitting Diodes DOI

Binhe Li,

Yang Li, Wei Yuan

et al.

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

Published: Oct. 21, 2024

Abstract Low temperature solution‐processible chiral metal halide perovskites, which posse the innately chiral‐induced spin orbit coupling (CISOC), are valuable for realization of room single junctions‐based spin‐light‐emitting diodes (spin‐LEDs), without involving integrated optics and ferromagnetic electrodes. The current challenging primarily lies on development high‐performance spin‐LEDs demonstration selectivity (CISS). Herein, organic cation based quasi‐2D perovskite films with prominently circularly polarized luminescence bright emissions fabricated application room‐temperature spin‐LEDs. A remarkable external quantum efficiency (EQE) 15.42% electroluminescence (CP‐EL) 4.98% well achieved in ambient condition. With studies spin‐related exciton states magneto‐photoluminescence (magneto‐PL), spin‐lifetime (τ s ) is estimated to be 20 ps. This work has greatly promoted present growth perovskites

Language: Английский

Citations

6
Chiral Ionic Liquids Enable High‐Performance Room Temperature Single Junction Spin‐Light Emitting Diodes DOI
Jun Tang,

Sheng Tao,

Yang Li

et al.

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 20, 2024

Abstract Room temperature and solution‐processible spin‐light emitting diodes (spin‐LEDs) are of practical importance since electronic spins act as information carriers for circularly polarized electroluminescence (CP‐EL) generation. The recent boost quasi‐2D chiral hybrid perovskites (CHPs) has gained unprecedented attention because the possible spin manipulation via innate chiral‐induced spin‐orbit coupling (CISOC) without involving cumbersome injection from ferromagnets. Herein, a unique method is developed using ionic liquids (CILs) antisolvents fabricating highly reproducible stable lead‐bromide thin films based single junction spin‐LEDs. With this, chirality successfully transferred into with outstanding chiroptical properties improved film crystallinities. More than 75% photoluminescent quantum yields (PLQY) 13% CP‐EL have been achieved. existence selectivity (CISS) proved large degree current () ≈80% long lifetime exceeding 1.0 ns attained. Further their magneto‐chiroptical effects explored through magnetic circular dichroism (MCD) magneto‐photoluminescence (MPL). opens new avenue development CHPs high‐performance

Language: Английский

Citations

5
Elucidating Interfacial Carrier Transfer Dynamics for Circularly Polarized Emission in Self-Assembled Perovskite Heterostructures DOI

Yao Xu,

Jian Li,

Wenheng Xu

et al.

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

Published: April 9, 2025

By integrating carrier transfer with spin-selectivity in mixed-dimensional perovskites heterostructures (HSs), exceptional chiroptical behaviors can be activated, offering avenues for advanced applications spintronics and quantum information technologies. However, the critical role of interface effects this photophysical process remains insufficiently explored. We demonstrate fabrication self-assembled chiral 2D/achiral nanocrystal (NC) HSs different morphologies activities. Using femtosecond transient reflection spectroscopy, underlying interface-dependent was unraveled. Spin-polarized holes generated 2D component within an ultrafast time scale ∼362 fs across coherent heterointerface, inducing circularly polarized luminescence (CPL) intrinsically achiral NCs a high Pc ∼10.3%. Furthermore, interfacial halide exchange utilized to extend CPL wavelength from green near-infrared. Our findings reveal correlation between properties, charge transfer, activity, providing insights development high-quality optimized optical properties.

Language: Английский

Citations

0
Technical Routes to Achieve High Circular Polarized Luminescence in Chiral Perovskites: A Mini‐Review DOI Creative Commons

Yongge Yang,

Yang Zhao, Qing Shen

et al.

Advanced Physics Research, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 7, 2025

Abstract Chiral hybrid organic‐inorganic perovskites (HOIPs) have emerged as promising materials for optoelectronic and spintronic applications, leveraging unique properties such circularly polarized luminescence (CPL), nonlinear optical (NLO) emission, chiral‐induced spin selectivity (CISS). However, challenges remain in stabilizing these under environmental stresses precisely controlling chirality scalable use. This review summarizes five main strategies to induce HOIPs, i.e., direct incorporation of chiral cations, surface modification with ligands, ion doping, template‐induced chirality, metasurfaces. Each approach offers distinct advantages optimizing CPL efficiency device stability, paving the way next‐generation applications detectors, information encryption, devices, etc.

Language: Английский

Citations

0
Chiral metal halide perovskites toward room temperature spin light-emitting diodes: Insights and perspectives DOI Open Access
Jingyi Ding,

Hailong Wang,

Jibo Tang

et al.

Chemical Physics Reviews, Journal Year: 2025, Volume and Issue: 6(2)

Published: April 14, 2025

Chiral metal halide perovskites (MHPs) have emerged for the excellent integration of spin states freedom with optoelectronic properties. The chiral-induced selectivity (CISS) effect enables chiral MHPs great potential to spin-dependent applications. In this review, we briefly summarize construction principles and recent discoveries on CISS MHPs. Then, room temperature light-emitting diodes (spin-LEDs) based are discussed. end, challenges opportunities related spin-LEDs proposed.

Language: Английский

Citations

0