Multifunctional Organic–Inorganic Hybrid Perovskite Microcrystalline Engineering and Electromagnetic Response Switching Multi‐Band Devices

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(25)

Published: March 19, 2023

High-efficiency electromagnetic (EM) functional materials are the core building block of high-performance EM absorbers and devices, they indispensable in various fields ranging from industrial manufacture to daily life, or even national defense security space exploration. Searching for high-efficiency realizing devices remain great challenges. Herein, a simple solution-process is developed rapidly grow gram-scale organic-inorganic (MAPbX3 , X = Cl, Br, I) perovskite microcrystals. They exhibit excellent response multi bands covering microwaves, visible light, X-rays. Among them, outstanding microwave absorption performance with multiple can be achieved, their intrinsic properties tuned by adjusting polar group. An ultra-wideband bandpass filter high suppression level -71.8 dB stopband GHz band, self-powered photodetectors tunable broadband narrowband photoresponse visible-light X-ray detector sensitivity 3560 µC Gyair-1 cm-2 band designed realized precisely regulating physical features designing novel planar device structure. These findings open door toward developing devices.

Language: Английский

---

Self‐Driven Prenucleation‐Induced Perovskite Crystallization Enables Efficient Perovskite Solar Cells

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(22)

Published: March 31, 2023

Abstract Perovskite film with high crystal quality is fundamental to achieving high‐performance solar cells. A fast nucleation process crucial improving the crystallization quality. Here, we propose a self‐driven prenucleation strategy achieve nucleation. This realized through rational solvent design. The key characteristics of different solvents are systematically evaluated. Among them, formamide, ultra‐high dielectric constant, low Gutman donor number, and boiling point, selected as co‐solvent. These unique render formamide double‐face that good for formamidinium iodide (FAI) CsI while poor PbI 2 . As result, induces ‐DMSO seeding crystals accelerates nucleation, crystalline perovskite film. efficiency hole transport layer‐free carbon‐based cells boosted beyond 19 % first time.

Language: Английский

---

Highly Stable and Efficient Light-Emitting Diodes Based on Orthorhombic γ-CsPbI₃ Nanocrystals

ACS Nano, Journal Year: 2023, Volume and Issue: 17(10), P. 9290 - 9301

Published: May 1, 2023

Orthorhombic γ-CsPbI3 possesses the highest structural stability among optically active (light-emissive) CsPbI3 perovskites. Here, we make use of a seed-assisted heteroepitaxial growth to fabricate seed/core/shell CaIx/γ-CsPbI3/CaI2 nanocrystals. Ultrasmall CaIx nanoparticles serve as seeds template Pb-centered octahedral arrangement which enables formation phase and at same time inhibit lattice strain by blocking force transfer that otherwise leads an twist so improve resulting An outer shell composed from material, CaI2, isolates formed nanocrystals environment, also significantly improves their under ambient conditions. Optical electrical studies indicate structure shallower set trap states compared cubic α-CsPbI3 Light-emitting diodes utilizing these show record high external quantum efficiency 25.3%, brightness over 13600 cd/m2, operational lifetime ∼14 h before reaching 50% initial luminance. These devices can repeatedly be illuminated 650 times ∼500 cd/m2 with no decline brightness, indicates great commercial potential.

Language: Английский

---

Stable and efficient CsPbI3 quantum-dot light-emitting diodes with strong quantum confinement

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

---

Suppressing wide-angle light loss and non-radiative recombination for efficient perovskite solar cells

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

Published: Jan. 9, 2025

Language: Английский

---

Recent Progress and Advances of Perovskite Crystallization in Carbon‐Based Printable Mesoscopic Solar Cells

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

Published: Jan. 15, 2025

Carbon-based printable mesoscopic solar cells (p-MPSCs) offer significant advantages for industrialization due to their simple fabrication process, low cost, and scalability. Recently, the certified power conversion efficiency of p-MPSCs has exceeded 22%, drawing considerable attention from community. However, key challenge in improving device performance is achieving uniform high-quality perovskite crystallization within mesoporous structure. This review highlights recent advancements p-MPSCs, with an emphasis on controlling kinetics regulating morphology confined mesopores. It first introduces offering a solid foundation understanding behavior. Additionally, summarizes mechanisms crystal nucleation growth, explaining how these processes influence quality perovskites. Furthermore, commonly applied strategies enhancing quality, such as additive engineering, solvent evaporation controlling, post-treatment techniques, are also explored. Finally, proposes several potential suggestions aimed at further refining crystallization, inspiring continued innovation address current limitations advance development p-MPSCs.

Language: Английский

---

Ligands in Lead Halide Perovskite Nanocrystals: From Synthesis to Optoelectronic Applications

Small, Journal Year: 2022, Volume and Issue: 19(11)

Published: Dec. 14, 2022

Abstract Ligands are indispensable for perovskite nanocrystals (NCs) throughout the whole lifetime, as they not only play key roles in controllable synthesis of NCs with different sizes and shapes, but also act capping shell that affects optical properties electrical coupling NCs. Establishing a systematic understanding relationship between ligands is significant to enable many potential applications This review mainly focuses on influence First all, ligands‐dominated size shape control discussed. Whereafter, surface defects bonding classified, corresponding post‐treatment via summarized. Furthermore, advances engineering towards high performance optoelectronic devices based NCs, including photodetector, solar cell, light emitting diode (LED), laser, finally challenges

Language: Английский

---

Bulk Incorporation with 4‐Methylphenethylammonium Chloride for Efficient and Stable Methylammonium‐Free Perovskite and Perovskite‐Silicon Tandem Solar Cells

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(9)

Published: Jan. 10, 2023

Abstract Methylammonium (MA)‐free perovskite solar cells have the potential for better thermal stability than their MA‐containing counterparts. However, efficiency of MA‐free lags behind due to inferior bulk quality. In this work, 4‐methylphenethylammonium chloride (4M‐PEACl) is added into a precursor, which results in greatly enhanced The crystal grains are significantly enlarged, and defects suppressed by factor four upon incorporation an optimal concentration 4M‐PEACl. Quasi‐2D perovskites formed passivate at grain boundaries crystals. Furthermore, surface chemistry modified, resulting energies more favorable hole extraction. This facile approach leads steady state 23.7% (24.2% reverse scan, 23.0% forward scan) cells. devices also show excellent light stability, retaining 93% initial after 1000 h constant illumination nitrogen environment. addition, four‐terminal mechanically stacked perovskite‐silicon tandem cell with champion 30.3% obtained using composition. encapsulated operational 98% performance 42 day/night cycles ambient atmosphere.

Language: Английский

---

Strain Engineering Toward High‐Performance Formamidinium‐Based Perovskite Solar Cells

Solar RRL, Journal Year: 2023, Volume and Issue: 7(19)

Published: July 16, 2023

The power conversion efficiency (PCE) of organic–inorganic halide perovskite solar cells (PSCs) has increased rapidly in recent years, with the certified best single‐junction photovoltaics reaching an astounding PCE 26%. Formamidine (FA)‐based perovskites possess excellent photovoltaic properties and superior thermal stability, establishing them as one most promising materials for light absorption. However, issue phase instability black‐phase formamidinium lead iodide ( α ‐FAPbI 3 ) seriously impeded its commercialization process, strain found films being regarded a significant factor impacting stability PSCs. This article begins by examining sources characterization techniques related to perovskites. Subsequently, it outlines effects on FA‐based presents strategies modify lattice strain. Finally, potential engineering future is discussed. review aims clarify impact perovskite, determine methods enhance device performance, ultimately facilitate these materials.

Language: Английский

---

Tailoring perovskite crystallization and interfacial passivation in efficient, fully textured perovskite silicon tandem solar cells

Joule, Journal Year: 2024, Volume and Issue: 8(10), P. 2811 - 2833

Published: July 19, 2024

Fully textured perovskite silicon tandem solar cells are promising for future low-cost photovoltaic deployment. However, the fill factor and open-circuit voltage of these devices currently limited by high density defects at grain boundaries interfaces with charge transport layers. To address this, we devise a strategy to simultaneously enhance crystallization passivate perovskite/C60 interface. By incorporating urea (CO(NH2)2) as an additive in solution step hybrid evaporation/spin-coating deposition method, kinetics accelerated, leading formation desired photoactive phase room temperature. With that, films large sizes (>1 μm) improved optoelectronic quality formed low annealing temperatures (100°C). Concurrently, remnant molecules expelled surface, which locally displaces C60 layer, thus reducing interfacial non-radiative recombination losses. this strategy, resulting achieve 30.0% power conversion efficiency.

Language: Английский

---