Regulating crystallization kinetics in high-performance perovskites solar modules via vapor seed layer engineering

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161632 - 161632

Опубликована: Март 1, 2025

Язык: Английский

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Synergistic Interfacial Dipole and π-Conjugation Effects Enable Efficient Tin Perovskite Solar Cells

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Март 31, 2025

Tin perovskites are considered promising candidates for realizing high-performance, lead-free perovskite solar cells (PSCs). Despite prominent progress made through bulk optimization, unsatisfactory interfaces between tin and charge transport layers critical obstacles to boosting device performance. Herein, we address this issue by introducing piperazine dihydroiodide (PDI) ferrocene (Fc) at the interface of perovskite/C60 synergistically improve interfacial transport. Specifically, PD+ interacts with formamidinium ions (FA+) form an dipole, Fc establishes π-π conjugation C60. These effects significantly electron extraction reduce energy losses. As a result, efficiency PSCs is remarkably improved from 10.62% 13.65%, accompanied enhanced stability. This work highlights importance modulation in toward efficient eco-friendly photovoltaics.

Язык: Английский

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Regulating Crystallization and Carrier Recombination of Quasi-2D Perovskite for Efficient Air-Processed Light-Emitting Diodes

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Май 19, 2025

Fabricating perovskite light-emitting diodes (PeLEDs) in ambient air is beneficial for reducing the production costs and promoting their further applications. However, device performance significantly restricted by uncontrolled crystallization unfavorable carrier recombination of films when processing under an environment. In this work, we report effective strategy to tackle these issues introducing a bifunctional molecule, formamidinium trifluoroacetate (FATFA). It found that FATFA can accelerate reduce defects perovskites improve recombination. Accordingly, air-processed green PeLEDs based on optimization exhibit high external quantum efficiency exceeding 16%, with maximum luminance approaching 33,000 cd m-2 operational half-lifetime nearly 25 min at initial brightness ∼900 m-2, which represent best-performed PeLEDs. This work provides feasible way realize cost-efficient boost practical applications future.

Язык: Английский

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Defect Passivation Strategies in Two‐Dimensional Organic–Inorganic Hybrid Perovskites for Enhanced Photoelectric Performance

Advanced Optical Materials, Год журнала: 2024, Номер 12(27)

Опубликована: Июль 30, 2024

Abstract The polycrystalline perovskite films treated with solutions inevitably are subjected to high‐density crystal defects, significantly affecting the performance and stability of perovskite‐based photodetectors. In this research, a reasonably designed organic small molecule using piperazine iodide (PI) as an additive is employed modify films. results indicate that not only improves crystallinity film but also effectively passivates defects by modifying local electron density. Consequently, recombination non‐radiation charges inhibited, improving optoelectronic device. modified flexible photoelectric device exhibits responsivity 3.07 mA W −1 under 405 nm laser illumination. Notably, it maintains high even after 7000 bending cycles. Furthermore, generality strategy verified applying various types two‐dimensional organic–inorganic hybrid perovskite. Additionally, another molecular amine phthalimide (PTM) selected further verify universality strategy, which reveals demonstrates same passivation PI. This provides novel idea for defect perovskite, signifying practical application significance developing wearable devices optimized performance, light‐emitting diodes, solar cells.

Язык: Английский

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Molecularly Engineered Alicyclic Organic Spacers for 2D/3D Hybrid Tin‐based Perovskite Solar Cells

Small, Год журнала: 2024, Номер unknown

Опубликована: Сен. 3, 2024

Abstract The high defect density and inferior crystallinity remain great hurdles for developing highly efficient stable Sn‐based perovskite solar cells (PSCs). 2D/3D heterostructures show strong potential to overcome these bottlenecks; however, a limited diversity of organic spacers has hindered further improvement. Herein, novel alicyclic spacer, morpholinium iodide (MPI), is reported structurally stabilized perovskite. Introducing secondary ammonium ether group in 2D enhances its rigidity, which leads increased hydrogen bonding intermolecular interaction within These strengthened interactions facilitate the formation oriented with low structural disorder, effective passivation Sn I defects. Consequently, MP‐based PSCs achieved power conversion efficiency (PCE) 12.04% superior operational oxidative stability. This work presents new insight into design PSCs.

Язык: Английский

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Hexafluoroisopropanol modified MXene for perovskite surface remodeling and interfacial dipole effect enhancement

Journal of Power Sources, Год журнала: 2024, Номер 625, С. 235710 - 235710

Опубликована: Ноя. 5, 2024

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