Large‐Scale, Stretchable, Self‐Protective, and Multifunctional Perovskite Luminescent Filament with Ultra‐High Stability DOI
Liyan Yang, Yunpeng Liu,

Xiaofang Li

et al.

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

Published: March 18, 2024

Abstract Lead halide perovskites possess great application potential in flexible displays and wearable optoelectronics owing to their prominent optoelectronic properties. However, the intrinsic instability upon moisture, heat, ultraviolet (UV) light irradiation hinders development application. In this work, an ultra‐stable CsPbX 3 (X = Cl, Br, I) perovskite luminescent filament (PLF) with high stretchability (≈2400%) luminescence performance (photoluminescence quantum yield (PLQY) of 24.5%, tunable emission spectrum, color purity) is introduced by a facile environmental‐friendly wet‐spinning technology via solvent extraction. Benefiting from situ encapsulation hydrophobic thermoplastic polyurethane (TPU) chelation Lewis base CO TPU acid Pb 2+ , CsPbBr PLF demonstrates ultra‐high photoluminescence (PL) stability when stored ambient air humidity circumstance, annealed at 50 °C, dipped water for 30 days, illuminated under 300 min, immersed organic solvents solutions pH 1‐13 5 respectively. Impressively, it retains 80% its initial PL after being recycled five times. Overall, promising prospects multifunctional applications, including dyes tensile strain sensing, pattern displays, secondary anti‐counterfeiting, hazard warning systems.

Language: Английский

Stability of Perovskite Light‐Emitting Diodes: Existing Issues and Mitigation Strategies Related to Both Material and Device Aspects DOI
Lingmei Kong, Xiaoyu Zhang, Chengxi Zhang

et al.

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(43)

Published: Aug. 3, 2022

Abstract Metal halide perovskites combine excellent electronic and optical properties, such as defect tolerance high photoluminescence efficiency, with the benefits of low‐cost, large‐area, solution‐based processing. Composition‐ dimension‐tunable properties have already been utilized in bright efficient light‐emitting diodes (LEDs). At same time, there are still great challenges ahead to achieving operational spectral stability these devices. In this review, origins instability perovskite materials, reasons for their degradation LEDs considered. Then, strategies improving materials reviewed, compositional engineering, dimensionality control, passivation, suitable encapsulation matrices, fabrication core/shell nanocrystals. For improvement LEDs, use inorganic charge‐transport layers, optimization charge balance, proper thermal management The review is concluded a detailed account current perspective on key approaches opportunities how reach goal stable, bright, LEDs.

Language: Английский

Citations

120
Highly bright and stable single-crystal perovskite light-emitting diodes DOI
Wenjing Chen,

Zongming Huang,

Haitao Yao

et al.

Nature Photonics, Journal Year: 2023, Volume and Issue: 17(5), P. 401 - 407

Published: Feb. 27, 2023

Language: Английский

Citations

112
Acceleration of radiative recombination for efficient perovskite LEDs DOI Creative Commons
Mengmeng Li, Yingguo Yang, Zhiyuan Kuang

et al.

Nature, Journal Year: 2024, Volume and Issue: 630(8017), P. 631 - 635

Published: May 29, 2024

The increasing demands for more efficient and brighter thin-film light-emitting diodes (LEDs) in flat-panel display solid-state lighting applications have promoted research into three-dimensional (3D) perovskites. These materials exhibit high charge mobilities low quantum efficiency droop

Language: Английский

Citations

101
Recent progress in perovskite solar cells: from device to commercialization DOI
Xinhui Luo, Xuesong Lin, Feng Gao

et al.

Science China Chemistry, Journal Year: 2022, Volume and Issue: 65(12), P. 2369 - 2416

Published: Nov. 3, 2022

Language: Английский

Citations

100
A Multifunctional “Halide‐Equivalent” Anion Enabling Efficient CsPb(Br/I)3 Nanocrystals Pure‐Red Light‐Emitting Diodes with External Quantum Efficiency Exceeding 23% DOI
Jibin Zhang, Tiankai Zhang, Zhuangzhuang Ma

et al.

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(8)

Published: Dec. 9, 2022

Pure-red perovskite LEDs (PeLEDs) based on CsPb(Br/I)3 nanocrystals (NCs) usually suffer from a compromise in emission efficiency and spectral stability account of the surface halide vacancies-induced nonradiative recombination loss, phase segregation, self-doping effect. Herein, "halide-equivalent" anion benzenesulfonate (BS- ) is introduced into NCs as multifunctional additive to simultaneously address above challenging issues. Joint experiment-theory characterizations reveal that BS- can not only passivate uncoordinated Pb2+ -related defects at NCs, but also increase formation energy vacancies. Moreover, because strong electron-withdrawing property sulfonate group, electrons are expected transfer NC for reducing effect altering n-type behavior near ambipolarity. Eventually, synergistic boost device performance achieved pure-red PeLEDs with CIE coordinates (0.70, 0.30) champion external quantum 23.5%, which one best value among ever-reported red approaching Rec. 2020 primary color. -modified PeLED exhibits negligible wavelength shift under different operating voltages. This strategy paves an efficient way improving PeLEDs.

Language: Английский

Citations

91
Passivation strategies for mitigating defect challenges in halide perovskite light-emitting diodes DOI Creative Commons
Xinyu Shen, Keehoon Kang, Zhongkai Yu

et al.

Joule, Journal Year: 2023, Volume and Issue: 7(2), P. 272 - 308

Published: Feb. 1, 2023

Language: Английский

Citations

84
Interface Modification for Efficient and Stable Inverted Inorganic Perovskite Solar Cells DOI
Tianfei Xu, Wanchun Xiang,

Junjie Yang

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(31)

Published: June 7, 2023

Due to their excellent thermal stability and ideal bandgap, metal halide inorganic perovskite based solar cells (PSCs) with inverted structure are considered as an choice for perovskite/silicon tandem cells. However, the power conversion efficiency (PCE) of still lags far behind that conventional n-i-p PSCs due interfacial energy level mismatch high nonradiative charge recombination. Herein, performance is significantly improved by engineering CsPbI3-x Brx films 2-mercapto-1-methylimidazole (MMI). It found mercapto group can preferably react undercoordinated Pb2+ from forming Pb-S bonds, which appreciably reduces surface trap density. Moreover, MMI modification results in a better alignment electron-transporting material, promoting carrier transfer reducing voltage deficit. The above combination open-circuit enhancement 120 mV, yielding champion PCE 20.6% 0.09 cm2 area 17.3% 1 area. Furthermore, ambient, operational heat stabilities also greatly improved. work demonstrates simple but effective approach fabricating highly efficient stable PSCs.

Language: Английский

Citations

76
All Solution‐Processed High Performance Pure‐Blue Perovskite Quantum‐Dot Light‐Emitting Diodes DOI

Aqiang Liu,

Chenghao Bi, Jianjun Tian

et al.

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(44)

Published: Aug. 10, 2022

Abstract Solution‐processed light‐emitting diodes (LEDs) show great potential for low‐cost fabrication of large‐area display panels, but the efficient perovskite LEDs (PeLEDs) cannot be achieved by all solution process, because emitter is easily destroyed subsequent solution. In particular, solution‐processed PeLEDs with blue emission wavelength in 460–470 nm (pure‐blue, meeting Rec. 2020 standards) still inferior. Here, highly and stable pure‐blue are process based on colloidal quantum dots difunctional ZnO (D‐ZnO) nanocrystals. The D‐ZnO nanocrystals obtained a ligand strategy phenethylammonium bromide, which not only repairs surface solvent solution, also enables balanced charge injection to suppress Auger recombination. PeLED presented emitting at 470 wavelength, maximum luminance 11 100 cd m ‐2 , external efficiency 8.7% (record emission). device showed continuous operation half‐lifetime 35 h .

Language: Английский

Citations

72
Inhibition of Ion Migration for Highly Efficient and Stable Perovskite Solar Cells DOI Open Access
Yang Zhong, Jia Yang, Xueying Wang

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(52)

Published: April 17, 2023

Abstract In recent years, organic‐inorganic halide perovskites are now emerging as the most attractive alternatives for next‐generation photovoltaic devices, due to their excellent optoelectronic characteristics and low manufacturing cost. However, resultant perovskite solar cells (PVSCs) intrinsically unstable owing ion migration, which severely impedes performance enhancement, even with device encapsulation. There is no doubt that investigation of migration summarization advances in inhibition strategies necessary develop “state‐of‐the‐art” PVSCs high intrinsic stability accelerated commercialization. This review systematically elaborates on generation fundamental mechanisms PVSCs, impact hysteresis, phase segregation, operational stability, characterizations PVSCs. Then, many related works inhibiting toward highly efficient stable summarized. Finally, perspectives current obstacles prospective boost meet all requirements commercialization success

Language: Английский

Citations

62
Suppressing Ion Migration of Mixed‐Halide Perovskite Quantum Dots for High Efficiency Pure‐Red Light‐Emitting Diodes DOI
Mingyuan Xie, Jie Guo, Xiaoyu Zhang

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(32)

Published: April 23, 2023

Abstract Perovskite‐based light‐emitting diodes (PeLEDs) with a mixed halide composition can be used to obtain the “pure red” emission, i.e., in 620–650 nm range, required for high‐definition displays. However, fast ion migration induces phase separation these materials under electric fields, resulting poor spectral stability and low efficiency. Herein, method producing CsPbI 3‐x Br x quantum dots (QDs) is reported which suppressed. The first achieved by anion exchange between 3 QDs hydrobromic acid (HBr), during that bromine ions efficiently passivate iodine vacancies of QDs. original oleic ligands are then exchanged 1‐dodecanethiol (1‐DT), suppresses via strong binding sulfhydryl group QD surface. PeLEDs based on exhibit pure‐red electroluminescence (EL) peak at 637 nm, maximum external efficiency (EQE) 21.8% an average value 20.4%, luminance 2653 cd m −2 , EQE decease increasing luminance. EL spectrum devices stable even 6.7 V they have half‐life 70 min initial 150 .

Language: Английский

Citations

53