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

Regulating Surface‐Passivator Binding Priority for Efficient Perovskite Light‐Emitting Diodes DOI

Xinwen Sun,

Weiwei Meng,

Kwan Ho Ngai

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(25)

Published: April 4, 2024

Suppressing trap-assisted nonradiative losses through passivators is a prerequisite for efficient perovskite light-emitting diodes (PeLEDs). However, the complex bonding between and perovskites severely suppresses passivation process, which still lacks comprehensive understanding. Herein, number, category, degree of bonds different functional groups are quantitatively assessed to study dynamics. Functional with high electrostatic potential large steric hindrance prioritize strong organic cations halides on perfect surface, leading suppressed coordination bulky defects. By modulating binding priorities capacity, from intense interaction significantly reduced, more direct process. Consequently, near-infrared PeLED without external light out-coupling demonstrates record quantum efficiency 24.3% at current density 42 mA cm

Language: Английский

Citations

10
Defects in lead halide perovskite light-emitting diodes under electric field: from behavior to passivation strategies DOI
Na Jiang,

Guoquan Ma,

Dandan Song

et al.

Nanoscale, Journal Year: 2024, Volume and Issue: 16(8), P. 3838 - 3880

Published: Jan. 1, 2024

This review summarizes the significance, behaviors, and passivation strategies of defects under electric field in perovskite materials optoelectronic devices.

Language: Английский

Citations

9
Tailored Supramolecular Additives to Control the Crystallization Process and Morphology of MAPbI3 DOI Creative Commons
Meike Kuhn, Felix A. Wenzel, Christopher Greve

et al.

Small, Journal Year: 2025, Volume and Issue: 21(9)

Published: Feb. 5, 2025

Perovskite films feature unique optoelectronic properties, rendering them promising for electronic devices. The properties depend on the morphology a broad range of length scales from nanometers to millimeters, influenced by variety factors. However, controlling is challenging. A tailored supramolecular additive, N, N'-bis(2-aminoethyl) terephthalamide developed control intermediate and perovskite crystallization methyl ammonium lead iodide (MAPbI3) enhance thermal moisture stability in final film. Reversible coordinative interactions carbonyl groups with Pb2+ ions via Lewis acid-base adduct subsequent ion-ion peripheral grain boundaries are combined which stabilized strong hydrogen bonding pattern formed between amide moieties additive molecules. Adding low amounts this precursor solution significantly decelerates structure formation systematically reduces crystallite size. Slower growth phases incorporation boundary observed multiple time-resolved techniques. Evidence single-molecule interlayers MAPbI3 crystals presence directed interaction molecules shown. Transferability approach other perovskites anticipated, paving way improved processing stability.

Language: Английский

Citations

1
Multifunctional Additives with Cation−π Interactions Enable High-Performance Blue Perovskite Light-Emitting Diodes DOI

Shuxin Wang,

Zhiqiu Yu,

Xiang‐Feng Yang

et al.

ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1183 - 1191

Published: Feb. 11, 2025

Language: Английский

Citations

1
Size matters: quantum confinement-driven dynamics in CsPbI3 quantum dot light-emitting diodes DOI
Shuo Li,

Wenxu Yin,

Weitao Zheng

et al.

Journal of Semiconductors, Journal Year: 2025, Volume and Issue: 46(4), P. 042103 - 042103

Published: April 1, 2025

Abstract The quantum confinement effect fundamentally alters the optical and electronic properties of dots (QDs), making them versatile building blocks for next-generation light-emitting diodes (LEDs). This study investigates how governs charge transport, exciton dynamics, emission efficiency in QD-LEDs, using CsPbI 3 QDs as a model system. By systematically varying QD sizes, we reveal size-dependent trade-offs LED performance, such enhanced smaller but increased brightness stability larger under high current densities. Our findings offer critical insights into design high-performance paving way scalable energy-efficient optoelectronic devices.

Language: Английский

Citations

1
Entropy-Driven Strongly Confined Low-Toxicity Pure-Red Perovskite Quantum Dots for Spectrally Stable Light-Emitting Diodes DOI
Jie Guo,

Yuhao Fu,

Weijia Zheng

et al.

Nano Letters, Journal Year: 2023, Volume and Issue: 24(1), P. 417 - 423

Published: Dec. 27, 2023

Spectrally stable pure-red perovskite quantum dots (QDs) with low lead content are essential for high-definition displays but difficult to synthesize due QD self-purification. Here, we make use of entropy-driven quantum-confined QDs fabricate light-emitting diodes (LEDs) that have toxicity and efficient spectrum-stable. Based on experimental data first-principles calculations, multiple element alloying results in a 60% reduction while improving entropy promote crystal stability. Entropy-driven exhibit photoluminescence 100% yields single-exponential decay lifetimes without alteration their morphology or structure. The LEDs utilizing spectrally electroluminescence, achieving brightness 4932 cd/m2, maximum external efficiency over 20%, 15-fold longer operational lifetime than the CsPbI3 QD-based LEDs. These achievements demonstrate can mitigate local compositional heterogeneity ion migration.

Language: Английский

Citations

21
Perovskite Nanocrystals Protected by Hermetically Sealing for Highly Bright and Stable Deep‐Blue Light‐Emitting Diodes DOI Creative Commons
Yongju Hong, Chungman Yu,

Hyeondoo Je

et al.

Advanced Science, Journal Year: 2023, Volume and Issue: 10(23)

Published: June 4, 2023

Metal-halide perovskite nanocrystals (NCs) have emerged as suitable light-emitting materials for diodes (LEDs) and other practical applications. However, LEDs with NCs undergo environment-induced ion-migration-induced structural degradation during operation; therefore, novel NC design concepts, such hermetic sealing of the NCs, are required. Thus far, viable synthetic conditions to form a robust semiconducting shell on been rarely reported LED applications because difficulties in delicate engineering encapsulation techniques. Herein, highly bright durable deep-blue (PeLED) formed by hermetically epitaxial ZnS shells is reported. This protects from environment, facilitates charge injection/transport, effectively suppresses interparticle ion migration operation, resulting exceptional brightness (2916 cd m-2 ) at 451 nm high external quantum efficiency 1.32%. Furthermore, even unencapsulated state, shows long operational lifetime (T50 1192 s (≈20 min) air. These results demonstrate that powerful strategy fabricating high-performance deep-blue-emitting PeLEDs.

Language: Английский

Citations

20
Recent advances in the development of perovskite@metal-organic frameworks composites DOI Creative Commons
Qian Li, Yanfei Zhang, Guangxun Zhang

et al.

National Science Open, Journal Year: 2023, Volume and Issue: 2(3), P. 20220065 - 20220065

Published: Feb. 27, 2023

Due to the advantages of adjustable structure, high porosity and rich active centers, metal-organic frameworks (MOFs) have received extensive attention. Meanwhile, perovskite has attracted researchers’ interest due its unique emission quantum yield excellent optoelectronic properties. However, instability under certain conditions hinders more comprehensive development. Fortunately, a novel strategy is encapsulate in pores MOFs protect it from external interference increase thus improving performance perovskite@MOF composites. In this review, latest research progress synthesis strategy, function application composites are systematically summarized. Additionally, challenges further developing discussed. Hopefully, review will provide some creative inspiration advance future studies on emerging field.

Language: Английский

Citations

19
Dual‐Defect Manipulation Enables Efficient and Spectrally Stable Blue Perovskite Light‐Emitting Diodes DOI Creative Commons
Chengxi Zhang, Hao Yuan, Lingmei Kong

et al.

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 11(14)

Published: April 21, 2023

Abstract Performance of blue solution‐processed perovskite light‐emitting diodes (LEDs) is limited by availability materials. Herein, 4‐(trifluoromethyl)benzoyl ammonium bromide (4‐TMBABr) used with abundant NH and CO groups to passivate the defects produce highly stable PEA x PA 2‐x (CsPbBr 3 ) n‐1 PbBr 4 perovskites for LED applications. The group in 4‐TMBABr suppresses Br‐ion mismatch through hydrogen bonds (N‐H···Br) coordinates unsaturated lead dangling (CO:Pb). effective defect passivation reduces nonradiative recombination films, hence enhancing its optical performance. In structure, sodium bis(trifluoromethanesulfonyl)imide (SBTI) modified NiO films are improve hole transport inhibit fluorescence quenching layer. dual‐defect manipulation strategy advantageous producing efficient spectrally LEDs, authors demonstrate an maximum luminance 1094 cd m −2 external quantum efficiency 10.3%. This work can inform underpin future development LEDs stabile

Language: Английский

Citations

19
Epitaxial Growth of Lead‐Free Double Perovskite Shell for CsPbX3/Cs2SnX6 (X = Cl, Br, and I) Core/Shell Perovskite Nanocrystals with Enhanced Photoelectric Properties and Stability DOI Creative Commons

Hanjie Lin,

Shuya Li, Yuchen Zhang

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(7)

Published: Nov. 1, 2023

Abstract All‐inorganic lead halide perovskite nanocrystals (NCs) have great optoelectronic properties with promising applications in light‐emitting diodes (LEDs), lasers, photodetectors, solar cells, and photocatalysis. However, the intrinsic toxicity of Pb instability NCs impede their broad applications. Shell‐coating is an effective method for enhanced environmental stability while reducing by choosing non‐toxic shell materials such as metal oxides, polymers, silica, etc. multiple can be encapsulated within material a uniform epitaxial‐type growth well‐isolated still challenging. In this work, lead‐free vacancy‐ordered double Cs 2 SnX 6 (X = Cl, Br, I) shells are epitaxially grown on surface CsPbX 3 hot‐injection method. The effectiveness protection demonstrated phase against UV illumination water. addition, photoluminescence quantum yields (PL QYs) increase CsPbCl CsPbBr after shelling because type I band alignment core/shell materials, charge transport obtained from CsPbI /Cs SnI due to efficient separation II alignment.

Language: Английский

Citations

19