Self‐Induced Bi‐interfacial Modification via Fluoropyridinic Acid For High‐Performance Inverted Perovskite Solar Cells

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

Published: Oct. 31, 2024

Abstract The uncontrolled crystallization of perovskite generates a significant number internal and interfacial defects, posing major challenge to the performance solar cells (PSCs). In this paper, novel bi‐interfacial modification strategy utilizing 5‐fluoropyridinic acid (FPA) is proposed modulate crystal growth provide defect passivation. It demonstrated that FPA self‐deposited at both top bottom interfaces films during thermal annealing. CO N functional groups in serve as chelating agents, binding closely uncoordinated Pb 2+ /Pb clusters, thereby passivating defects reducing charge recombination interfaces. strong chemical interactions between further stabilize Pb‐I framework, promoting formation high‐quality films, confirmed by situ photoluminescence measurements. Consequently, modified inverted PSCs achieved an exceptional power conversion efficiency (PCE) 25.37%. Moreover, devices retained over 93.17% initial after 3000 h continuous illumination under one‐sun equivalent conditions nitrogen atmosphere. This paper presents promising pathway for enhancing stability through self‐induced approach.

Language: Английский

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Dual Interface Passivation With Multi‐Site Regulation Toward Efficient and Stable Inverted Perovskite Solar Cells

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

Published: Feb. 23, 2025

Abstract The rapid crystallization process of perovskite produces a large number defects that remain critical factor disturbs the performance solar cells (PSCs). In this research, these challenges are mitigated by introducing multifunctional 2,6‐pyridinedicarboxylic acid chloride (PAC) as an additive into perovskite. During thermal annealing process, predominant accumulation PAC occurs at upper and buried interfaces film. possesses multiple passivating sites facilitate anchoring lead iodine defects, thereby enhancing quality material across both its dual grain boundaries. With unique property, combined with advantages enhanced crystallization, reduced non‐radiative recombination, boosted charge carrier mobility, optimal energy level alignment, PSC achieved power conversion efficiency (PCE) 25.60% maintained more than 90% after 3000 h under one equivalent light 1400 dark high temperature (85 °C). interface passivation strategy provides sustainable solution to stability environmental for commercialization cells.

Language: Английский

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Surface Stress Engineering of CsPbI₃ Perovskite Quantum Dots for Efficient Solar Cells

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 9, 2025

Abstract Inorganic CsPbI 3 perovskite quantum dots (PQDs) demonstrate high potential for new‐generation photovoltaics, but the imbalanced surface stress of PQDs induced by ligand deficiency and incompatibility significantly deteriorates their optoelectronic properties phase stability, restricting photovoltaic performance. Herein, a lattice regularization strategy is proposed engineering PQDs, in which series onium cations with appropriate dimensions good affinity are introduced into resulting substantially ameliorated stability PQDs. Meanwhile, engineering, PQD solid enhanced stacking orientation constructed, facilitating charge carrier transport. Consequently, solar cell an efficiency up to 17.01% obtained, one highest values inorganic cells. Such provides feasible access maximize high‐performance optoelectronics.

Language: Английский

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Optimizing Conjugation of Polymer Hole Transport Materials via Cyclic Alkoxylation for Highly Efficient and Stable Perovskite Solar Cells

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

Published: Dec. 4, 2024

Abstract Hole transport materials (HTMs) play a crucial role in realizing efficient perovskite solar cells (PSCs), as they improve affinity and passivation, charge extraction, ultimately the performance of PSCs. In this study, manipulating conjugation extension poly(triaryl amine) (PTAA) derivatives by cyclic alkoxylation side benzene groups with benzo[ d ][1,3]dioxole (PTAAO5) dihydrobenzo[ b ][1,4]dioxine (PTAAO6) is focused on. PTAAO6 exhibits extended π‐conjugation within groups, leading to improved energy level alignment enhanced carrier compared both PTAA PTAAO5. This strong also promotes interactions between perovskite, resulting larger grain sizes reduced defects layer. Therefore, PSCs incorporating HTM achieve an outstanding power conversion efficiency 25.19%, along excellent operational stability, retaining 90.2% initial PCE after 1000 h under ISOS‐L‐3 testing conditions. These results underscore promising approach for tailoring polymer HTMs provide insights designing high‐performance

Language: Английский

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