Metal Halide Perovskite Single Crystals toward Electroluminescent Applications DOI
Chao‐qiang Wang, Shuai Chen, Jiansheng Jie

et al.

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

Published: May 10, 2024

Abstract Metal halide perovskite single crystals (MHP SCs) have attracted extensive attention due to their superior properties, such as higher carrier mobility, longer diffusion length, and better stability than polycrystalline counterparts. In particular, the suppression of ion migration Auger recombination endows MHP SCs with excellent electroluminescence (EL) thus holding great potential for highly efficient stable light‐emitting devices. this review, general overview crystal structures are begin, highlight merits in terms outstanding optoelectronic properties high stability. Then, appropriate growth methods high‐quality, thickness‐controlled EL device applications systematically summarized. Subsequently, recent advancements developing SC‐based diodes (PeLEDs) discussed, effective strategies further enhance performance reviewed. Moreover, application electrically pumped lasers is highlighted. Finally, review concluded a detailed account current challenges perspective on key approaches opportunities optimization SC growth, improvement integration

Language: Английский

Focus on perovskite emitters in blue light-emitting diodes DOI Creative Commons
Xiaoyu Yang,

Li Ma,

Maotao Yu

et al.

Light Science & Applications, Journal Year: 2023, Volume and Issue: 12(1)

Published: July 24, 2023

Abstract Blue perovskite light-emitting diodes (PeLEDs) are essential in pixels of displays, while their progress lags far behind red and green counterparts. Here, we focus on recent advances blue PeLEDs systematically review the noteworthy strategies, which categorized into compositional engineering, dimensional control, size confinement, optimizing microstructures, energy landscapes, charge behaviors wide-bandgap emitters (bandgap >2.5 eV). Moreover, stability related devices is discussed. In end, propose a technical roadmap for fabrication state-of-the-art to chase achieve comparable performance with other two primary-color devices.

Language: Английский

Citations

65
A novel highly thermal-stable Ba2GdSbO6:Sm3+ phosphor with intrinsic deep-red emission for personal identification and plant cultivation LEDs DOI

Kezhou Jiang,

Chang Zhou, Wenhao Li

et al.

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 980, P. 173518 - 173518

Published: Jan. 14, 2024

Language: Английский

Citations

23
Self-Stabilized Quasi-2D Perovskite with an Ion-Migration-Inhibition Ligand for Pure Green LEDs DOI
Dezhong Zhang, Chunyu Liu, Jiayun Sun

et al.

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(3), P. 1133 - 1140

Published: Feb. 23, 2024

Perovskite light-emitting diodes (PeLEDs) have recently achieved a great breakthrough in external quantum efficiency (EQE). However, the operational stability of pure primary color PeLEDs lags far behind because serious ion migration. Herein, self-stabilized quasi-2D perovskite is constructed with strategically synthesized ion-migration-inhibition ligand (IMIligand) to realize highly stable and efficient green approaching standard light Rec. 2020. The IMIligand takes role not only eliminate migration pathways anchor halide ions suppress but also further enhance crystalline orientation energy transfer perovskites. Meanwhile, overcomes degradation electrical performance caused by conventional exogenous passivation additives. Ultimately, figure merit at least double that previous works. devices achieve an EQE 26.2% 920 min initial luminance 1000 cd m–2.

Language: Английский

Citations

21
Dual-Ligand Red Perovskite Ink for Electrohydrodynamic Printing Color Conversion Arrays over 2540 dpi in Near-Eye Micro-LED Display DOI
Xiao Yang, Shuli Wang, Yaqi Hou

et al.

Nano Letters, Journal Year: 2024, Volume and Issue: 24(12), P. 3661 - 3669

Published: Feb. 26, 2024

The lack of stability red perovskite nanocrystals (PeNCs) remains the main problem that restricts their patterning application. In this work, dual-ligand passivation strategy was introduced to stabilize PeNCs and inhibit halogen ion migration during high-voltage electrohydrodynamic (EHD) inkjet printing. as-printed arrays exhibit highest emisson intensity least blue shift compared with samples other strategies under a high electric field EHD Combining green PeNC inks, single-color tricolor color conversion layer were successfully printed, minimum pixel size 5 μm spatial resolution 2540 dpi. coordinate CsPbBrI

Language: Английский

Citations

18
Efficient Homojunction/Heterojunction Photocatalyst via Integrating CsPbBr3 Quantum Dot Homojunction with TiO2 for Degradation of Organic Dyes DOI
Chun Sun,

Yiwei Zhao,

Yelin Ding

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(19), P. 24806 - 24815

Published: May 4, 2024

A novel TiO2–CsPbBr3(Q) photocatalyst is proposed and rationally constructed, where CsPbBr3 perovskite quantum dots (QDs) of various sizes inside mesopore TiO2 (M-TiO2) are integrated. These QDs, generated in situ within M-TiO2, establish a type-II homojunction. Interestingly, Z-scheme heterojunction simultaneously formed at the interface between TiO2. Due to coexistence homojunction heterojunction, photogenerated electrons effectively transferred from CsPbBr3, thereby suppressing carrier recombination thus enhancing degradation rhodamine B (RhB). Compared with pure TiO2, shows significantly enhanced photocatalytic performance for RhB degradation. The efficiency presence attains 97.7% 5 min under light illumination, representing highest observed among photocatalysts based on This study will facilitate development superior semiconductor catalysts applications.

Language: Английский

Citations

16
Light‐Emitting Diodes Based on Metal Halide Perovskite and Perovskite Related Nanocrystals DOI Creative Commons
Ying Liu, Zhuangzhuang Ma, Jibin Zhang

et al.

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

Published: Jan. 29, 2025

Abstract Light‐emitting diodes (LEDs) based on halide perovskite nanocrystals have attracted extensive attention due to their considerable luminescence efficiency, wide color gamut, high purity, and facile material synthesis. Since the first demonstration of LEDs MAPbBr 3 was reported in 2014, community has witnessed a rapid development performances. In this review, historical perspective is provided then comprehensive survey current strategies for high‐efficiency lead‐based LEDs, including synthesis optimization, ion doping/alloying, shell coating presented. Then basic characteristics emission mechanisms lead‐free perovskite‐related emitters environmentally friendly from standpoint different colors are reviewed. Finally, progress LED applications covered an outlook opportunities challenges future developments field provided.

Language: Английский

Citations

2
Mitigating halide ion migration by resurfacing lead halide perovskite nanocrystals for stable light-emitting diodes DOI

Jun‐Nan Yang,

Jingjing Wang, Yi‐Chen Yin

et al.

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(16), P. 5516 - 5540

Published: Jan. 1, 2023

Lead halide perovskite nanocrystals are promising for next-generation high-definition displays, especially in light of their tunable bandgaps, high color purities, and carrier mobility. Within the past few years, external quantum efficiency nanocrystal-based light-emitting diodes has progressed rapidly, reaching standard commercial applications. However, low operational stability these remains a crucial issue industrial development. Recent experimental evidence indicates that migration ionic species is primary factor giving rise to performance degradation diodes, ion closely related defects on surface at grain boundaries thin films. In this review, we focus central idea reconstruction nanocrystals, discuss influence migration, summarize recent advances resurfacing nanocrystal strategies toward mitigating improve as-fabricated diode devices. From perspective resurfacing, set out research direction improving both spectral diodes.

Language: Английский

Citations

33
Top-Down Exfoliation Process Constructing 2D/3D Heterojunction toward Ultrapure Blue Perovskite Light-Emitting Diodes DOI
Kai Zhang, Zhenhuang Su, Yang Shen

et al.

ACS Nano, Journal Year: 2024, Volume and Issue: 18(5), P. 4570 - 4578

Published: Jan. 26, 2024

3D perovskites with low energy disorder and high ambipolar charge mobility represent a promising solution for efficient bright light-emitting diodes. However, the challenges of regulating nanocrystal size to trigger quantum confinement effect control surface trap states reduce loss hinder applications in blue perovskite diodes (PeLEDs). In this study, we present top-down exfoliation method obtain films clipped nanocrystals tunable bandgaps by employing methyl cyanide (MeCN) post-treatment. method, MeCN solvent exfoliates components grains through partial dissolution process. Moreover, dissolved precursor can be further utilized construct an ingenious 2D/3D heterostructure incorporating organic spacer into solvent, contributing defect passivation improved transfer. Consequently, PeLEDs featuring ultrapure emission at 478 nm achieve record external efficiency 12.3% among their counterparts. This work emphasizes significance inducing provides viable scheme situ regulation crystals.

Language: Английский

Citations

13
Color/Spectral Stability of Mixed Halide Perovskite Light‐Emitting Diodes DOI Creative Commons
Congyang Zhang, Luis K. Ono, Yabing Qi

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(27)

Published: March 3, 2024

Abstract Structuring metal halide perovskites with mixed anions is a promising strategy for attaining the desired bandgap and emission color technological applications such as electroluminescent (EL) light‐emitting diodes (LEDs) ultrahigh‐definition displays. However, these suffer from severe EL spectral stability issues. During device operation, homogeneously perovskite phases are prone to form halide‐segregated domain spatially inhomogeneous color, which hinders practical use of LEDs (PeLEDs). In this review, comprehensive survey performed about underlying driving forces phase segregation, representative strategies discussed development color/spectral stable PeLEDs. Finally, future directions prospects outlined regarding further enhancement

Language: Английский

Citations

13
Enhancing crystal integrity and structural rigidity of CsPbBr3 nanoplatelets to achieve a narrow color-saturated blue emission DOI Creative Commons
Qianqian Huang,

Wenxu Yin,

Bo Gao

et al.

Light Science & Applications, Journal Year: 2024, Volume and Issue: 13(1)

Published: May 11, 2024

Abstract Quantum-confined CsPbBr 3 perovskites are promising blue emitters for ultra-high-definition displays, but their soft lattice caused by highly ionic nature has a limited stability. Here, we endow nanoplatelets (NPLs) with atomic crystal-like structural rigidity through proper surface engineering, using strongly bound N-dodecylbenzene sulfonic acid (DBSA). A stable, rigid crystal structure, as well uniform, orderly-arranged of these NPLs is achieved optimizing intermediate reaction stage, switching from molecular clusters to mono-octahedra, while interaction DBSA resulted in formation Cs x O monolayer shell capping the NPL surface. As result, both and optical stability enhanced strong covalent bonding DBSA, which inhibits undesired phase transitions decomposition perovskite potentially ligand desorption. Moreover, rather small amount ligands at results short inter-NPL spacing closely-packed films, facilitates efficient charge injection transport. Blue photoluminescence produced bright (nearly unity emission quantum yield) peaks 457 nm an extremely narrow bandwidth 3.7 80 K, electroluminescence (peaked 460 nm) also reaches record-narrow value 15 room temperature. This corresponds CIE coordinates (0.141, 0.062), meets Rec. 2020 standards displays.

Language: Английский

Citations

13