Coherence Programming for Efficient Linearly Polarized Perovskite Light-Emitting Diodes DOI

Meiqin Xiao,

Jonghee Yang, Wei Zhang

et al.

ACS Nano, Journal Year: 2024, Volume and Issue: 18(42), P. 29261 - 29272

Published: Oct. 10, 2024

Although quasi-two-dimensional (quasi-2D) perovskites are ideal material platforms for highly efficient linearly polarized electroluminescence owing to their anisotropic crystal structures, so far, there has been no practical implementation of these materials the demonstration perovskite light-emitting diodes (LP-PeLEDs). This scarcity is due difficulty in orientation and phase distribution control quasi-2D while minimizing defects, all which required manifest aligned transition dipole moments (TDMs). To achieve this multifaceted goal, herein, we introduce a synergistic strategy by incorporating both trimethylolpropane triacrylate anchoring layer 18-Crown-6 molecular passivator into film fabrication process. It found that interfacial guides oriented growth along (110) plane, whereas reduces number defects homogenizes phase. As result, with macroscopically TDM renders high radiative recombination degree linear polarization (DoLP) constructed. "coherence-programmed emission layer" demonstrates LP-PeLEDs, not only achieving maximum external quantum efficiency ∼23.7%, brightness ∼36,142 cd/m

Language: Английский

Dual-stage Crystallization Regulation for Efficient and Stable Perovskite Solar Cells DOI

Zhuoyuan Kong,

Shuo Ding, Ming Cai

et al.

Materials Today Energy, Journal Year: 2025, Volume and Issue: unknown, P. 101836 - 101836

Published: Feb. 1, 2025

Language: Английский

Citations

0
Surface Modification with Diaza-Crown Ether for High-Efficiency and Stable Inverted Perovskite Solar Cells DOI

B.Y. Li,

Haixia Mao,

Yingjie Xing

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

The presence of positively charged cationic defects and residual PbI2 on the perovskite surface has hindered improvement device performance long-term stability. Herein, 4,10-diaza-15-crown 5-ether (DA15C5), a diaza-crown ether featuring multiple N atom O donors, is developed to modify surface. Owing strong chemical interactions between DA15C5 both Pb2+ A-site cations, films are effectively passivated, thereby suppressing nonradiative recombination promoting charge transport at cathode interface. Furthermore, treatment promotes formation two-dimensional (2D) phase by reacting with PbI2, which optimizes energy-level alignment enhances film Consequently, open-circuit voltage (VOC) fill factor (FF) solar cells (PSCs) improved significantly, achieving an impressive power conversion efficiency (PCE) 24.75%. Moreover, environmental thermal stabilities DA15C5-treated PSCs markedly enhanced. unencapsulated retains over 80% initial PCE after heating 1400 h 85 °C in N2 atmosphere maintains 78% 550 air 40 ± 10% relative humidity (RH). This study proposes as molecular modulator achieve efficient stable PSCs.

Language: Английский

Citations

0
Nickel Chlorophyll-Derived Hole Transport Materials for Stable and Efficient Inverted Perovskite Solar Cells DOI
Ziyan Liu,

Xianzhao Wang,

Tian‐Fu Xiang

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: April 4, 2025

Hole-selective layers (HSLs) are critical for efficient and stable perovskite solar cells (PSCs). Chlorophylls (Chls) their analogs exhibit unique optoelectronic properties, making them attractive photovoltaics. However, dopant-free Chl-based materials remain underexplored, with reported power conversion efficiencies (PCEs) below 19%. This study investigates three nickel chlorins (NiChls) as monomers functional materials. Nickel methyl pyropheophorbide-a (NiChl-Oxo), derived from natural Chl-a, was chemically modified at the C13-keto-carbonyl group, yielding NiChl-Deoxo NiChl-CN. Electrochemical polymerization used to fabricate corresponding polymerized NiChl films HSLs. Without dopants, NiChl-Deoxo-based PSCs achieved a record PCE of 21.8%, fill factor 83.8%, which is highest efficiency date. Additionally, these devices exhibited exceptional long-term stability. highlights effectiveness strategic molecular modifications in advancing presents promising pathway developing high-performance, HSLs next-generation PSCs.

Language: Английский

Citations

0
Sweet Zwitterionic Aspartame for High‐Performance Wide‐Bandgap Perovskite Solar Cells and Tandem Devices DOI
Shulin Wang,

Yufei Shao,

Weideren Dai

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 8, 2025

Abstract The development of high‐quality wide‐bandgap (WBG) perovskite films is essential for achieving high‐efficiency and stable tandem solar cells (TSCs). However, WBG perovskites often suffer from high trap‐state densities significant non‐radiative recombination, leading to substantial voltage losses. To address these challenges, aspartame (ASP), a food sweetener, designed serve as multifunctional additive regulate the microstructure precursor solution optimize crystallization dynamics, enabling fabrication films. resulting exhibit reduced defect density enhanced charge extraction properties. Consequently, single‐junction (PSCs) with bandgap 1.67 eV achieve power conversion efficiency (PCE) 23.20%, while perovskite/Si TSCs reach PCE 30.68%. Furthermore, ASP‐treated devices photostability operational durability, retaining 95% their initial after 1900 h in ambient conditions. This work demonstrates potential molecular engineering through zwitterionic additives optoelectronic properties stability films, paving way high‐performance TSCs.

Language: Английский

Citations

0
Coherence Programming for Efficient Linearly Polarized Perovskite Light-Emitting Diodes DOI

Meiqin Xiao,

Jonghee Yang, Wei Zhang

et al.

ACS Nano, Journal Year: 2024, Volume and Issue: 18(42), P. 29261 - 29272

Published: Oct. 10, 2024

Although quasi-two-dimensional (quasi-2D) perovskites are ideal material platforms for highly efficient linearly polarized electroluminescence owing to their anisotropic crystal structures, so far, there has been no practical implementation of these materials the demonstration perovskite light-emitting diodes (LP-PeLEDs). This scarcity is due difficulty in orientation and phase distribution control quasi-2D while minimizing defects, all which required manifest aligned transition dipole moments (TDMs). To achieve this multifaceted goal, herein, we introduce a synergistic strategy by incorporating both trimethylolpropane triacrylate anchoring layer 18-Crown-6 molecular passivator into film fabrication process. It found that interfacial guides oriented growth along (110) plane, whereas reduces number defects homogenizes phase. As result, with macroscopically TDM renders high radiative recombination degree linear polarization (DoLP) constructed. "coherence-programmed emission layer" demonstrates LP-PeLEDs, not only achieving maximum external quantum efficiency ∼23.7%, brightness ∼36,142 cd/m

Language: Английский

Citations

2