Highly Stable Mixed Halide Perovskite Nanocrystals for High Performance Pure‐Red Light‐Emitting Diodes DOI Open Access
Siyuan Ye, Fei Lin,

Linwei Peng

et al.

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

Published: Nov. 6, 2024

Abstract Pure‐red CsPbBr x I 3−x nanocrystals (NCs) light‐emitting diodes (PeLEDs) are promising candidates for high‐performance display due to their high brightness, excellent color purity and readily tunable band gap. However, achieving highly stable pure‐red PeLEDs is still challenging phase segregation in the mixed halide NCs. Herein, NCs with a relatively small size synthesized using phosphate acid as ligand, effectively avoiding spontaneous separation. The strong interaction between ligands Pb 2+ facilitates slow formation of NCs, resulting NC sizes. In addition, dense passivation layer forms around surface which imparts stability against light, moisture heat treatment. Utilizing an emission layer, emitting at 633 nm, external quantum efficiency (EQE) 10.0%, brightness 8231 cd m −2 half‐life 393 min, fabricated. Notably, show stability, negligible changes spectra under elevated bias voltage 14 V. This work provides new avenue enhancing performance pure red through strongly coordinated ligand passivation.

Language: Английский

Highly efficient blue light-emitting diodes based on mixed-halide perovskites with reduced chlorine defects DOI Creative Commons
Yun Gao,

Qiuting Cai,

Yifan He

et al.

Science Advances, Journal Year: 2024, Volume and Issue: 10(29)

Published: July 17, 2024

Perovskite light-emitting diodes (PeLEDs) provide excellent opportunities for low-cost, color-saturated, and large-area displays. However, the performance of blue PeLEDs lags far behind that their green red counterparts. Here, we show external quantum efficiencies (EQEs) scale linearly with photoluminescence yields (PL QYs) CsPb(Br

Language: Английский

Citations

42
Synchronously Polishing the Lead-Rich Surface and Passivating Surface Defects of CsPb(Br/I)3 Quantum Dots for High-Performance Pure-Red PeLEDs DOI
Xin Zhou, Mengmeng Yang, Chao Shen

et al.

Nano Letters, Journal Year: 2024, Volume and Issue: 24(12), P. 3719 - 3726

Published: March 14, 2024

Mixed-halide CsPb(Br/I)3 perovskite quantum dots (QDs) are regarded as one of the most promising candidates for pure-red light-emitting diodes (PeLEDs) due to their precise spectral tuning property. However, lead-rich surface these QDs usually results in halide ion migration and nonradiative recombination loss, which remains a great challenge high-performance PeLEDs. To solve above issues, we employ chelating agent 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid hydrate (DOTA) polish meanwhile introduce new ligand 2,3-dimercaptosuccinic (DMSA) passivate defects QDs. This synchronous post-treatment strategy high-quality with suppressed an improved photoluminescence yield, enables us fabricate spectrally stable PeLEDs peak external efficiency 23.2%, representing best performance based on mixed-halide reported date.

Language: Английский

Citations

17
Microsecond-response perovskite light-emitting diodes for active-matrix displays DOI Creative Commons
Yun Gao,

Hongjin Li,

Xingliang Dai

et al.

Nature Electronics, Journal Year: 2024, Volume and Issue: 7(6), P. 487 - 496

Published: June 18, 2024

Abstract Perovskite light-emitting diodes (PeLEDs) could be of use in the development active-matrix displays. However, due to ion migration crystal structure, PeLEDs have electroluminescence rise times over milliseconds, which is problematic for high-refresh-rate Here, we show that time can reduced microseconds using an individual-particle passivation strategy. The approach based on BF 4 − ions passivate every nanocrystal a perovskite emissive layer during film deposition. It leads defect-free with discrete nanostructure and excellent crystallinity, inhibits migration. Our strategy applied films different colours: red (635 nm), green (520 nm) blue (475 nm). These all demonstrate response within high external quantum efficiencies 22.7%, 26.2% 18.1%, respectively. This allows us create microsecond-response exhibit above 20% at display brightness 500–3,000 cd m −2 devices resolution 30 pixels per inch. We also develop red, displays 90

Language: Английский

Citations

17
Towards operation‐stabilizing perovskite solar cells: Fundamental materials, device designs, and commercial applications DOI Creative Commons

Jian-Fang Qin,

Zhigang Che,

Yifei Kang

et al.

InfoMat, Journal Year: 2024, Volume and Issue: 6(4)

Published: Feb. 1, 2024

Abstract Over the last decade, perovskite solar cells (PSCs) have drawn extensive attention owing to their high power conversion efficiency (single junction: 26.1%, perovskite/silicon tandem: 33.9%) and low fabrication cost. However, short lifespan of PSCs with initial still blocks practical applications. This operational instability may originate from intrinsic extrinsic degradation materials or devices. Although lifetime has been prolonged through component, crystal, defect, interface, encapsulation engineering, so on, systematic analysis failure regularity for perspective devices against multiple operating stressors is indispensable. In this review, we start elaboration predominant pathways mechanism under working stressors. Then strategies improving long‐term durability respect fundamental materials, interface designs, device summarized. Meanwhile, key results discussed understand limitation assessing stability, potential applications in indoor photovoltaics wearable electronics are demonstrated. Finally, promising proposals, encompassing material processing, film formation, strengthening, structure designing, encapsulation, provided improve stability promote commercialization. image

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
Resurfacing mixed-halide perovskite nanocrystal for efficient and spectral stable pure-red light-emitting diodes DOI

Wenda Sun,

Haolin Lu,

Changjiu Sun

et al.

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 110760 - 110760

Published: Feb. 1, 2025

Language: Английский

Citations

2
Perovskite Nanocrystals: Superior Luminogens for Food Quality Detection Analysis DOI
Yuechun Li,

Zhaowen Cui,

Longhua Shi

et al.

Journal of Agricultural and Food Chemistry, Journal Year: 2024, Volume and Issue: 72(9), P. 4493 - 4517

Published: Feb. 21, 2024

With the global limited food resources receiving grievous damage from frequent climate changes and ascending demand resulting increasing population growth, perovskite nanocrystals with distinctive photoelectric properties have emerged as attractive prospective luminogens for exploitation of rapid, easy operation, low cost, highly accurate, excellently sensitive, good selective biosensors to detect foodborne hazards in practices. Perovskite demonstrated supreme advantages luminescent biosensing products due their high photoluminescence (PL) quantum yield, narrow full width at half-maximum PL, tunable PL entire visible spectrum, preparation, various modification strategies compared conventional semiconductors. Herein, we carried out a comprehensive discussion concerning application high-performance products, including brief introduction nanocrystals, nanocrystal-based biosensors, different categories products. Finally, challenges opportunities faced by superior were proposed promote practicality future supply.

Language: Английский

Citations

7
Lead-halide perovskite quantum dots embedded in mesoporous silica as heterogeneous photocatalysts combined with organocatalysts for asymmetric catalysis DOI
Hao Ren, Yiming Li, Wenjing Li

et al.

Green Chemistry, Journal Year: 2024, Volume and Issue: 26(10), P. 6068 - 6077

Published: Jan. 1, 2024

CsPbBr 3 quantum dots embedded in KIT-6 to form silica-shell-protected heterogeneous photocatalysts, which were further combined with chiral organocatalysts forming dual-catalysts explore the activity and stereoselectivity asymmetric catalysis.

Language: Английский

Citations

6
Perovskite nanocrystals (PNCs) served as an emerging optical indicator for food safety and quality assessment: progress, challenges, and opportunities DOI
Shuo Qi, Eslam M. Hamed, Pengfei Ma

et al.

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 514, P. 215925 - 215925

Published: May 12, 2024

Language: Английский

Citations

5
2D/0D Heterojunction Interface with Photovoltaic Enhancement and Stabilization for Label‐Free Exosome Biosensor DOI

Yindian Wang,

Suyun Zhong,

Jaebeom Lee

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(45)

Published: May 27, 2024

Abstract The selection and design of interface materials as the key to engineering is crucial for excellent performance optoelectronic devices, enabling multi‐functional integration at interfaces. MXene has been extensively employed in devices an material. primary drawback interfacial applications, however, MXene's vulnerability oxidation hot, humid environments, which severely reduces photovoltaic performance. Based on hetero‐interface engineering, this work offers a novel 2D‐semiconductor/0D‐plasma heterojunction MXene‐TA‐Au‐PEG (MTAP) high‐performance multifunctional MTAP not only effectively protects against stacking spontaneous oxidation, but also exhibits properties antifouling capability. Moreover, enhance SPR spectroscopy, allowing direct, real‐time detection tumor cell exosomes with LODs low 0.28 particles mL −1 . addresses conventional “three S” requirements sensors terms sensitivity, specificity, stability by integrating photoelectric enhancement, antifouling, oxidative stabilization characteristics. Finally, results serum sample analysis showed sensor some potential application value clinical diagnosis. This study perspectives fabrication 2D/0D heterojunctions using semiconductor plasma materials, aim developing improved sensing chips.

Language: Английский

Citations

4