Oriented Halide Perovskite Nanostructures and Thin Films for Optoelectronics DOI Creative Commons
Jie Chen, Yang Zhou, Yongping Fu

et al.

Chemical Reviews, Journal Year: 2021, Volume and Issue: 121(20), P. 12112 - 12180

Published: July 12, 2021

Oriented semiconductor nanostructures and thin films exhibit many advantageous properties, such as directional exciton transport, efficient charge transfer separation, optical anisotropy, hence these are highly promising for use in optoelectronics photonics. The controlled growth of structures can facilitate device integration to improve optoelectronic performance benefit in-depth fundamental studies the physical properties materials. Halide perovskites have emerged a new family cost-effective materials next-generation high-power conversion efficiency photovoltaics versatile high-performance optoelectronics, light-emitting diodes, lasers, photodetectors, high-energy radiation imaging detectors. In this Review, we summarize advances fabrication halide perovskite with dimensionality crystallographic orientation, along their applications characteristics optoelectronics. We examine methods, mechanisms, strategies several technologically relevant structures, including nanowires, nanoplates, nanostructure arrays, single-crystal films, oriented films. highlight discuss photophysical remarkable Finally, survey remaining challenges provide perspective regarding opportunities further progress field.

Language: Английский

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
A Multifunctional Additive Strategy Enables Efficient Pure‐Blue Perovskite Light‐Emitting Diodes DOI
Yongjie Liu, Shuxin Wang,

Zhiqiu Yu

et al.

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

Published: May 11, 2023

Lead halide perovskites have shown exceptional performance in light-emitting devices (PeLEDs), particularly producing significant electroluminescence sky-blue to near-infrared wavelengths. However, PeLEDs emitting pure-blue light at 465-475 nm are still not satisfactory. Herein, efficient and stable reported by controlling phase distribution, passivation of defects, as well surface modifications using multifunctional phenylethylammonium trifluoroacetate (PEATFA) reduced-dimensional p-F-PEA2 Csn-1 Pbn (Br0.55 Cl0.45 )3n+1 polycrystalline perovskite films. Compared with 4-fluorophenylethylammonium (p-F-PEA+ ) the pristine films, (PEA+ has lower adsorption energy while interacting perovskites, resulting large-n low-dimensional which can greatly facilitate charge transport within The interaction between CO group (TFA- significantly reduces defects Additionally, electron-giving CF3 TFA- uplifts potential smooth electronic injection devices. additive strategy leads elevated radiative recombination carrier films As a result, exhibit maximum external quantum efficiency (EQE) 11.87% 468 spectral output, highest date for PeLEDs. Thus, this study extends way high-efficiency LED polycrystal

Language: Английский

Citations

68
Design Rules for Obtaining Narrow Luminescence from Semiconductors Made in Solution DOI
Hao Nguyen, Grant J. Dixon, Florence Y. Dou

et al.

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(12), P. 7890 - 7952

Published: June 13, 2023

Solution-processed semiconductors are in demand for present and next-generation optoelectronic technologies ranging from displays to quantum light sources because of their scalability ease integration into devices with diverse form factors. One the central requirements used these applications is a narrow photoluminescence (PL) line width. Narrow emission widths needed ensure both color single-photon purity, raising question what design rules obtain made solution. In this review, we first examine colloidal emitters variety including light-emitting diodes, photodetectors, lasers, information science. Next, will delve spectral broadening, "homogeneous" broadening dynamical mechanisms single-particle spectra, heterogeneous static structural differences ensemble diffusion. Then, compare current state art terms width materials II–VI dots (QDs) nanoplatelets, III–V QDs, alloyed metal–halide perovskites nanocrystals 2D structures, doped nanocrystals, and, finally, as point comparison, organic molecules. We end some conclusions connections, an outline promising paths forward.

Language: Английский

Citations

46
Manipulating Local Lattice Distortion for Spectrally Stable and Efficient Mixed‐halide Blue Perovskite LEDs DOI
Li Zhang, Yuanzhi Jiang, Yanxing Feng

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(21)

Published: March 3, 2023

Mixed-halide perovskites are considered the most straightforward candidate to realize blue perovskite light-emitting diodes (PeLEDs). However, they suffer severe halide migration, leading spectral instability, which is particularly exaggerated in high chloride alloying perovskites. Here, we demonstrate energy barrier of migration can be tuned by manipulating degree local lattice distortion (LLD). Enlarging LLD a suitable level increase barrier. We herein report an "A-site" cation engineering tune optimal level. DFT simulation and experimental data confirm that manipulation suppresses Conclusively, mixed-halide PeLEDs with champion EQE 14.2 % at 475 nm have been achieved. Moreover, devices exhibit excellent operational stability (T50 72 min), representing one efficient stable pure-blue reported yet.

Language: Английский

Citations

43
High-Performance Blue Perovskite Light-Emitting Diodes Enabled by Synergistic Effect of Additives DOI
Fujun Zhang, Yingguo Yang,

Yanbo Gao

et al.

Nano Letters, Journal Year: 2024, Volume and Issue: 24(4), P. 1268 - 1276

Published: Jan. 19, 2024

While quasi-two-dimensional (quasi-2D) perovskites have good properties of cascade energy transfer, high exciton binding energy, and quantum efficiency, which will benefit high-efficiency blue PeLEDs, inefficient domain distribution management unbalanced carrier transport impede device performance improvement. Herein, (2-(9H-carbazol-9-yl)ethyl)phosphonic acid (2PACz) methyl 2-aminopyridine-4-carboxylate (MAC) were simultaneously introduced to a quasi-2D perovskite film. Relying on the synergistic effect 2PACz MAC, it not only modulates phase inhibiting n = 2 but also greatly improves electrical property As result, as-modified PeLED demonstrated an external efficiency (EQE) 17.08% luminance 10142 cd m–2. This study exemplifies among dual additives offers new effective additive strategy modulating building balanced transport, paves way for fabrication highly efficient PeLEDs.

Language: Английский

Citations

21
Efficient and Stable Red Perovskite Light‐Emitting Diodes via Thermodynamic Crystallization Control DOI

Shi‐Chi Feng,

Yang Shen,

Xin‐Mei Hu

et al.

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

Published: Sept. 2, 2024

Abstract Efficient and stable red perovskite light‐emitting diodes (PeLEDs) demonstrate promising potential in high‐definition displays biomedical applications. Although significant progress has been made device performance, meeting commercial demands remains a challenge the aspects of long‐term stability high external quantum efficiency (EQE). Here, an situ crystallization regulation strategy is developed for optimizing films through ingenious vapor design. Mixed containing dimethyl sulfoxide carbon disulfide (CS 2 ) incorporated to conventional annealing, which contributes thermodynamics dominated well‐aligned cascade phase arrangement. Additionally, surface defect density minimized by CS molecule adsorption. Consequently, target exhibit smooth exciton energy transfer, reduced density, blocked ion migration pathways. Leveraging these advantages, spectrally PeLEDs are obtained featuring emission at 668, 656, 648 nm, yield record peak EQEs 30.08%, 32.14%, 29.04%, along with prolonged half‐lifetimes 47.7, 60.0, 43.7 h initial luminances 140, 250, 270 cd m −2 , respectively. This work provides universal represents stride toward commercialization PeLEDs.

Language: Английский

Citations

21
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

20
Efficient Green Spin Light-Emitting Diodes Enabled by Ultrafast Energy- and Spin-Funneling in Chiral Perovskites DOI
Jingwen Yao, Zhiyu Wang, Yuling Huang

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(20), P. 14157 - 14165

Published: May 10, 2024

Introducing molecular chirality into perovskite crystal structures has enabled the control of carrier spin states, giving rise to circularly polarized luminescence (CPL) in thin films and electroluminescence (CPEL) LEDs. Spin-LEDs can be fabricated either through a spin-filtering layer by chiral-induced selectivity or chiral emissive layer. The former requires high degree polarization compatible spinterface for efficient injection, which might not easily integrated Alternatively, also generate electroluminescence, but efficiency remains low fundamental mechanism is elusive. In this work, we report an green LED based on quasi-two-dimensional (quasi-2D) perovskites as emitting (EML), where CPEL directly produced without separate injection. optimized exhibited strong CPL at 535 nm with photoluminescence quantum yield (PLQY) 91% dissymmetry factor (glum) 8.6 × 10–2. Efficient spin-LEDs were successfully demonstrated, large EL (gEL) 7.8 10–2 maximum external (EQE) 13.5% room temperature. Ultrafast transient absorption (TA) spectroscopic study shows that generated from rapid energy transfer accompanied 2D 3D perovskites. Our only demonstrates reliable approach achieve performance reveals

Language: Английский

Citations

20
Stable and efficient CsPbI3 quantum-dot light-emitting diodes with strong quantum confinement DOI Creative Commons
Yanming Li,

Ming Deng,

Xuanyu Zhang

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: July 7, 2024

Abstract Even though lead halide perovskite has been demonstrated as a promising optoelectronic material for next-generation display applications, achieving high-efficiency and stable pure-red (620~635 nm) emission to cover the full visible wavelength is still challenging. Here, we report light-emitting diodes emitting light at 628 nm high external quantum efficiencies of 26.04%. The performance attributed successful synthesizing strongly confined CsPbI 3 dots with good stability. strong binding 2-naphthalene sulfonic acid ligands are introduced after nucleation suppress Ostwald ripening, meanwhile, ammonium hexafluorophosphate exchanges long chain avoids regrowth by during purification process. Both enhance charge transport ability dots. state-of-the-art synthesis pure red achieves 94% efficiency, which can maintain over 80% 50 days, providing method

Language: Английский

Citations

20
Advanced Organic–Inorganic Hybrid Materials for Optoelectronic Applications DOI
Kun Zhou,

Bingyu Qi,

Zhongwei Liu

et al.

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

Published: Sept. 9, 2024

Abstract Research on organic–inorganic hybrid materials (OIHMs) has experienced explosive growth in the past decades. The diversity of organic components allows for introduction various spatial scales, functional groups, and polarities, while inorganic provide higher hardness, heat resistance, stability, their flexible combination facilitates formation diverse structures. Furthermore, simple cost‐effective synthesis methods, such as room temperature solution processes mechanochemical techniques, enable precise control over materials' properties at different thus achieving adjustable structure–performance relationships. This review will discuss recent research progress OIHMs within field optoelectronics related optoelectronic device applications. According to dimension nature interface, this divides into four structural categories. ongoing revealed applications fields solar cells, light‐emitting devices, detectors, memristors. As an outlook, potential perovskite 0D metal halide materials, which are currently most studied, enhancing performance stability is discussed.

Language: Английский

Citations

19