Unveiling the Role of Additive Molecular Characteristics in Regulating Chlorine Loss and Phase Distribution for Blue Perovskite Light‐Emitting Diodes

Advanced Functional Materials, Год журнала: 2024, Номер 34(51)

Опубликована: Авг. 23, 2024

Abstract Perovskite light‐emitting diodes (PeLEDs) have garnered extraordinary attention in displaying field owing to their excellent luminescence properties. Although exogenous additives are extensively employed for optimizing PeLEDs, comprehensive regulation including side effects still lacks in‐depth study. Here the first time, it is demonstrated that deprotonation degree of significantly influences performance blue PeLEDs. Benzenesulfonic acid (BSA) and ammonium benzenesulfonate (ABS) with similar molecular structures while distinctly different dissociation constants (p K a ) used modifying perovskites. By comparison, high‐p ABS holds greater potential boosting device performance, contributing an improved peak external quantum efficiency 18.8%. This discrepancy ascribed fact low‐p BSA prone induce prominent perovskite chlorine loss its intense deprotonation, suppresses vacancy formation. Meanwhile, adsorption energy organic spacer onto greatly reduced due strong intermolecular hydrogen bonding ABS, concentrated phase arrangement smooth exciton transfer. Additionally, modification further trap‐mediated nonradiative recombination by coordinating undercoordinated lead (II) ions at grain boundaries. work provides valuable guidelines additive screening toward high‐performance

Язык: Английский

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Synergistic Passivation on Buried Interface for Highly Efficient and Stable p–i–n Perovskite Solar Cells

Small, Год журнала: 2024, Номер unknown

Опубликована: Июнь 11, 2024

Abstract The properties of an interface at the hole transport layer (HTL)/perovskite are crucial for performance and stability perovskite solar cells (PVSCs), especially buried between HTL layer. Here, a molecular named potassium 1‐trifluoroboratomethylpiperidine (3FPIP) assistant‐modified bottom strategy is proposed to improve charge transfer capability balances energy level perovskite. BF 3 − in 3FPIP molecule interacts with undercoordinated Pb 2+ passivate iodine vacancies enhance PVSCs performance. Furthermore, infiltration K + ions into molecules enhances crystallinity Therefore, treatment exhibit champion 24.6%. More importantly, corresponding devices represent outstanding ambient stability, remaining 92% initial efficiency after 1200 h. This work provides new method engineering functional group synergy.

Язык: Английский

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Enhancing Durability of Organic–Inorganic Hybrid Perovskite Solar Cells in High‐Temperature Environments: Exploring Thermal Stability, Molecular Structures, and AI Applications

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 19, 2024

Abstract The commercialization of perovskite solar cells (PSCs), as an emerging industry, still faces competition from other renewable energy technologies in the market. It is essential to ensure that PSCs are durable and stable high‐temperature environments order meet varied market demands hot regions or seasons. influence high temperatures on complex, encompassing factors such lattice strain, crystal phase changes, creation defects, ion movement. Furthermore, it intensifies vibrations phonon scattering, which turn impacts migration rate charge carriers. This review focuses durability organic–inorganic hybrid under temperatures. begins by analyzing impact external temperature variations internal dynamics PSCs. Subsequently, outlines various mechanisms provided different functional molecules, applied interface stabilization, grain boundary passivation, growth control, electrode protection, development new hole transport layers, enhance thermal stability Additionally, machine learning (ML) discussed for predicting structure stability, operational material screening, with a focus potential deep explainable artifical intelligence (AI) techniques

Язык: Английский

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Enhancing the Efficiency and Stability of Inverted Formamidinium-Cesium Lead-Triiodide Perovskite Solar Cells through Lewis Base Pretreatment of Buried Interfaces

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(27), С. 35732 - 35739

Опубликована: Июнь 26, 2024

Mixed components of formamidinium(FA) and cesium (Cs)-based perovskite solar cells are the most hopeful for commercialization owing to their excellent operational phase stabilities, especially devices with inverted structure. The nonradiative recombination carriers can be effectively suppressed through interface optimization, therefore, performance improved. Notably, buried emerges as critical aspects such charge transport, kinetics, morphology films. This study focuses on a straightforward yet effective approach overcome challenges between organic polymers (poly(-triarylamine) (PTAA) FACs-based PTAA substrate is pretreated Lewis base known 2-butynoic acid (BA) C═O functional group. First, it an interfacial buffering layer, harmonizing stress mismatch layers, consequently optimizing crystallization improving film quality. Second, Pb2+ defect passivated at binding group BA molecule. dual-function strategy leads substantial enhancement in both photoelectric conversion efficiency (PCE) stability devices. Finally, PCE device-modified reaches impressive 23.33%. Furthermore, unencapsulated treatment maintain approximately 94% initial after aging maximum power point tracking 1000 h.

Язык: Английский

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Target therapy at buried interfaces toward efficient and stable inorganic perovskite solar cells

Chemical Engineering Journal, Год журнала: 2024, Номер 496, С. 154189 - 154189

Опубликована: Июль 23, 2024

Язык: Английский

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