Mixed‐Ligand Chiral Quasi‐2D Perovskites for Standard and Deep Blue CP‐LEDs DOI

Xinyao Yan,

Rui Cao,

Ruxi Zhang

et al.

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

Published: Aug. 7, 2024

Abstract This study presents the development of mixed‐ligand quasi‐2D perovskites ((2‐PEA) x ( R/S ‐2‐BA) 2 MA 1 Cs Pb 3 Br 10+ , = 0.8, 1.6, 2.4) for circularly polarized light‐emitting diodes (CP‐LEDs). By utilizing strong confinement effect 2‐phenylethylammonium (2‐PEA) and chirality R / S ‐2‐butylammonium ‐2‐BA), room‐temperature luminescence (CPL) across green to deep blue spectrum is achieved. The CPL attributes transfer spin‐polarized excitons while originates from direct excitation luminescent phases with intrinsic chirality. Finally, CP‐LEDs under ambient are realized. Notably, standard CP‐EL achieved based on 0.8PEA/( ‐2‐BA)‐ 1.2PEA/( ‐2‐BA)‐films impressive electroluminescent asymmetry factors (0.122 0.175), highlighting potential chiral in opening avenues full‐color display.

Language: Английский

Double-side 2D/3D heterojunctions for inverted perovskite solar cells DOI
Randi Azmi,

Drajad Satrio Utomo,

Badri Vishal

et al.

Nature, Journal Year: 2024, Volume and Issue: 628(8006), P. 93 - 98

Published: Feb. 21, 2024

Language: Английский

Citations

158
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

25
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

22
Achieving Near‐Unity Red Light Photoluminescence in Antimony Halide Crystals via Polyhedron Regulation DOI Creative Commons
Jin‐Feng Liao, Zhipeng Zhang, Lei Zhou

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(24)

Published: April 15, 2024

Exploration of efficient red emitting antimony hybrid halide with large Stokes shift and zero self-absorption is highly desirable due to its enormous potential for applications in solid light emitting, active optical waveguides. However, it still challenging rarely reported. Herein, a series (TMS)

Language: Английский

Citations

20
Molecular sublimation enables 2D–3D transformation of orientational FAPbI3 perovskites DOI
Zihui Liang,

Jinguo Cao,

Zezhu Zhou

et al.

Nature Synthesis, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Language: Английский

Citations

2
Designing Polymer Electrolytes via Ring‐Opening Polymerization for Advanced Lithium Batteries DOI
Shi Wang, Lei Zhang,

Qinghui Zeng

et al.

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 14(3)

Published: Nov. 27, 2023

Abstract Replacing liquid electrolytes with solid‐state polymer (SPEs) can solve the safety hazards of Li metal batteries (LMBs) while increasing their energy density. However, there has been limited success so far in preparing advanced SPEs controllable molecular structure and chemical composition, posing great obstacles to further promoting its application LMBs. Recently, ring‐opening polymerization (ROP), including cationic ROP, anionic metathesis polymerization, become a dazzling new star achieving due mild conditions composition (molecular structure, functional group), etc. Besides, is no small molecule released during process, which means reduced interfacial side reaction. Hence, this review, merits ROP mechanism as well interfering factors, etc are evaluated from perspective synthetic chemistry. Furthermore, review focuses on outlining existing cases related much possible summarize them different ring structures (from triple multivariate ring) methods, hoping provide comprehensive understanding serve strategic guidance for designing high‐performance SPEs. Challenges opportunities regarding burgeoning field also discussed at end.

Language: Английский

Citations

37
Bilayer 2D-3D Perovskite Heterostructures for Efficient and Stable Solar Cells DOI
Peng Chen, Dongxu He, Xia Huang

et al.

ACS Nano, Journal Year: 2023, Volume and Issue: 18(1), P. 67 - 88

Published: Dec. 22, 2023

With a stacking-layered architecture, the bilayer two-dimensional-three-dimensional (2D-3D) perovskite heterostructure (PHS) not only eliminates surface defects but also protects 3D matrix from external stimuli. However, these 2D-3D PHSs suffer impaired interfacial charge carrier transport due to relatively insulating 2D fragments with random phase distribution. Over past decade, substantial efforts have been devoted pioneering molecular and structural designs of interlayers for improving their mobility, which enables state-of-the-art solar cells high power conversion efficiency exceptional operational stability. Herein, this review offers comprehensive up-to-date overview on recent progress PHSs, encompassing advancements spacer cation engineering, modification, advanced deposition protocols, characterization techniques. Then, evolutionary trajectory is outlined by summarizing its mainstream development trends, followed perspective discussion about future research opportunities toward efficient durable cells.

Language: Английский

Citations

28
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

17
“T-shaped” Carbazole Alkylammonium Cation Passivation in Perovskite Solar Cells DOI
Zhuojie Shi, Renjun Guo,

Ran Luo

et al.

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(2), P. 419 - 427

Published: Jan. 10, 2024

Incorporating alkylammonium cations atop the 3D perovskite enables effective defect passivation and significantly enhances power conversion efficiency of solar cells. However, diversity durability this strategy have been limited to ligand type diffusion ligands due high reactivity. Here, we designed bulky "T-shaped" conjugated carbazole with inner π–π interaction enlarged steric hindrance minimize while maintaining effects. As verified by grazing incidence X-ray diffraction transient absorption spectra, these passivators could keep a stable intrinsic crystal phase on surface after thermal aging. Additionally, devices utilizing organic semiconductor-based were relatively constant in series resistance introduced higher hole mobility than PEAI. Finally, champion device using passivator achieved maximum 25.1% improved operational stability under 1 sun illumination.

Language: Английский

Citations

12
Dual-ligand quasi-2D perovskites with chiral-induced spin selectivity for room temperature spin-LEDs DOI

Haotian Gao,

Yu Chen,

Ruxi Zhang

et al.

Materials Horizons, Journal Year: 2024, Volume and Issue: 11(12), P. 2906 - 2913

Published: Jan. 1, 2024

We developed new quasi-2D perovskites with chiral and achiral organic cations as co-ligands demonstrated their effective application in spin-LEDs at room temperature based on the chiral-induced spin selectivity (CISS) effect.

Language: Английский

Citations

10