Suppressing Interlayer Ion Migration in CsPbX3 Nanocrystal Films for Realizing Efficient and Stable Electroluminescence DOI

L.W. Ye,

Yun Gao,

Yifeng Feng

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 30, 2025

Abstract Mixed‐halide perovskite light‐emitting diodes (PeLEDs) face the critical challenge of field‐dependent phase separation. Discrete colloidal CsPbX 3 nanocrystals anchored with ligands are promising to suppress separation, yet it remains a mystery how ion migration proceeds when integrated into LEDs as emissive films. Specifically, influence inside single nanocrystal or across along electric field on performance PeLEDs needs be decoupled. Here, low‐temperature‐assisted transfer‐printing method is developed construct model PeLED containing clear CsPbBr ‐CsPbI film interface for tracing between films direction fields. The comprehensive study demonstrates that halogen ions crossing lead severe separation and poor device stability, rather than horizontal intra‐layer diffusion. monolayer prevents caused by interlayer migration, significantly improving electroluminescent including spectrum lifetime. optimized structure achieves high external quantum efficiency 26.9% remarkably improved operational half‐lifetime 61.2 h at an initial luminance 100 cd m −2 in pure‐red based mixed‐halide CsPb(I x /Br 1‐x ) , more 300 times longer control using multilayer nanocrystals.

Язык: Английский

Multiple Chemical Interactions in Additive Engineering of Perovskite for Enhanced Efficiency and Stability of Pure Blue Light-Emitting Diodes DOI

Ziheng Xiong,

Run Zhang, Dezhong Zhang

и другие.

The Journal of Physical Chemistry Letters, Год журнала: 2025, Номер 16(9), С. 2196 - 2203

Опубликована: Фев. 21, 2025

Additive engineering is extensively employed in perovskite light-emitting diodes (PeLEDs) to enhance the device performance. However, effectiveness of additives restricted, as they generally interact with only one or two components within structure. Consequently, these are unable fulfill comprehensive functional requirements imposed by materials. In this work, we successfully designed and synthesized a multifunctional additive N-(perfluorophenyl)-P,P-diphenylphosphinic amide (PFNPO) via one-step synthesis approach. Multiple chemical interactions can be provided between PFNPO different components, thereby effectively modulating quasi-two-dimensional (quasi-2D) crystallization, passivating coordination-unsaturated Pb defects, suppressing halide ion migration simultaneously. Based on synergistic effects, incorporation pure blue quasi-2D PeLEDs resulted significant enhancement external quantum efficiency from 1.83 4.26%, an operational lifetime that was extended more than 3-fold, improved spectral stability at 466 nm.

Язык: Английский

Процитировано

1
Phase Control and Defect Passivation via (2-Aminoethyl)phosphonic Acid-Modified PEDOT:PSS for Blue Perovskite Light-Emitting Devices DOI
Z. Y. Ge, Li Song, Yuan Zhang

и другие.

ACS Applied Nano Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 14, 2025

Achieving pure blue emission of perovskite light-emitting diodes (PeLEDs) is great importance for fulfilling full-color display and lighting applications. However, achieving high-performance PeLEDs in bromide quasi-2D (Q2D) perovskites has always been a formidable challenge. Here, an interface engineering strategy proposed to regulate the light color device photoelectric performance simultaneously by employing (2-aminoethyl)phosphonic acid (AEP)-modified poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS). The AEP-PEDOT:PSS not only enhances wettability toward precursor but also coordinates with unsaturated Pb atoms, facilitating growth nanocrystals fewer defects. Thereby, shifted from sky-blue region higher PLQY was achieved. Additionally, incorporation AEP reduces conductivity PEDOT:PSS film, enabling more balanced charge transport device. Consequently, modification achieve external quantum efficiency (EQE) 5.2%, approximately 1.9 times that control Our findings may provide valuable insights helpful guidance development Q2D LEDs.

Язык: Английский

Процитировано

1
Synergistic Mixed Halide and Additive Strategy for Efficient Pure Red Quasi-2D Perovskite Light-Emitting Diodes DOI
Fanyuan Meng,

Shengxuan Shi,

Zhao Chen

и другие.

Journal of Materials Chemistry C, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Stable pure red PeLEDs were achieved via a synergistic mixed-halide and TDA strategy, where concurrently passivates defects anchors halides to suppress spectral redshift for high-performance optoelectronics.

Язык: Английский

Процитировано

0
Violet light excitable organic halides with short ∼ns emissions for multiple optoelectronic applications DOI
Tianrui Zhou,

Yunluo Wang,

Zhiyu Qin

и другие.

Materials Chemistry Frontiers, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Novel violet-excitable organic halides with short PL lifetimes (∼ns) enable green lighting and visible light communication (VLC), achieving a −3 dB bandwidth of 22.1 MHz, suggesting the promising potential in VLC.

Язык: Английский

Процитировано

0
Intrinsically‐Stretchable and Patternable Quantum Dot Color Conversion Layers for Stretchable Displays in Robotic Skin and Wearable Electronics DOI Creative Commons
K. W. Kim,

D. Kim,

Doh-Yeon Kim

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 6, 2025

Abstract Stretchable displays are essential components as signal outputs in next‐generation stretchable electronics, particularly for robotic skin and wearable device technologies. Intrinsically‐stretchable patternable color conversion layers (CCLs) offer practical solutions developing full‐color micro‐light‐emitting diode (LED) displays. However, significant challenges remain creating CCLs without backlight leakage under mechanical deformation. Here, a novel material strategy heavy‐metal‐free quantum dot (QD) CCLs, potentially useful electronics is presented. Through versatile crosslinking technique, uniform high‐concentration QD loading the elastomeric polydimethylsiloxane matrix loss of optical properties achieved. These demonstrate excellent capabilities with minimal leakage, even 50% tensile strain. Additionally, fine‐pixel patterning process resolutions up to 300 pixels per inch compatible suitable high‐resolution display applications. The integration these micro‐LED also demonstrated, showcasing their use haptic‐responsive healthcare monitoring sensors. This study offers promising preparation methodology QDs/polymer composites highlights potential advancing flexible light‐emitting devices.

Язык: Английский

Процитировано

0
Efficient Rec. 2020 Compliant Pure‐Green Mixed‐Cation Perovskite Light‐Emitting Diodes With Multifunctional Co‐Additives DOI
Maowei Jiang, Long Tu Li, Zhiwen Qi

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 13, 2025

Abstract Perovskite light‐emitting diodes (PeLEDs) compliant with Rec. 2020 standards have raised increasing attention for next‐generation displays. As a class of pure‐green emitters, the mixed‐cation FA x Cs 1‐x PbBr 3 perovskites exhibit compatible band emission, but suffer from inferior luminescence performance. The approach to tackling this issue is hindered by lack in‐depth understanding their crystallization manipulating mechanism. This work unveils process 0.7 0.45 GA 0.1 perovskites, demonstrating fast spontaneous growth readily induces severe crystal defects accompanied poor charge confinement. motivates us introduce additional kinetic barriers manipulate perovskite via synergistic co‐additives 3‐((2‐(methacryloyloxy)ethyldimethyl)ammonio)‐propane‐1‐sulfonate (DMAPS) and 1,4,7,10,13,16‐hexaoxacyclooctadecane (crown). multifunctional groups in afford robust chemical affinities diverse organic inorganic precursor ions simultaneously, which enable decent nanograin effective defect healing Ultimately, high photoluminescence quantum yield 96% are achieved. resultant PeLEDs compliance champion external efficiency (EQE) 31.89%, average EQE 29.5%, maximum luminance 2 × 10 5 cd m −2 operational half‐lifetime 3.2 h at an initial 7000 (extrapolated: ≈3500 100 ).

Язык: Английский

Процитировано

0
Suppressing Interlayer Ion Migration in CsPbX3 Nanocrystal Films for Realizing Efficient and Stable Electroluminescence DOI

L.W. Ye,

Yun Gao,

Yifeng Feng

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 30, 2025

Abstract Mixed‐halide perovskite light‐emitting diodes (PeLEDs) face the critical challenge of field‐dependent phase separation. Discrete colloidal CsPbX 3 nanocrystals anchored with ligands are promising to suppress separation, yet it remains a mystery how ion migration proceeds when integrated into LEDs as emissive films. Specifically, influence inside single nanocrystal or across along electric field on performance PeLEDs needs be decoupled. Here, low‐temperature‐assisted transfer‐printing method is developed construct model PeLED containing clear CsPbBr ‐CsPbI film interface for tracing between films direction fields. The comprehensive study demonstrates that halogen ions crossing lead severe separation and poor device stability, rather than horizontal intra‐layer diffusion. monolayer prevents caused by interlayer migration, significantly improving electroluminescent including spectrum lifetime. optimized structure achieves high external quantum efficiency 26.9% remarkably improved operational half‐lifetime 61.2 h at an initial luminance 100 cd m −2 in pure‐red based mixed‐halide CsPb(I x /Br 1‐x ) , more 300 times longer control using multilayer nanocrystals.

Язык: Английский

Процитировано

0