Surface Engineering of Perovskite Films via Sequential Moisture Cooling and Passivation for Efficient Solar Cells

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

Published: Jan. 16, 2025

Abstract Defect density on the perovskite film surface significantly exceeds that found in bulk, primarily due to presence of dangling bonds and excessive strain. Herein, a synergistic engineering is reported aimed at reducing defects films. This method involves subjecting thermally‐annealed films controlled cooling condition involving an ambient environment with regulated humidity, as opposed nitrogen environment, followed by phenethylammonium iodide (PEAI) passivation. The treated moisture (MC) exhibit enhanced radiative recombination, prolonged charge carrier lifetime, improved hole transport extraction when contact layer (HTL), alongside significant reduction Notably, passivation effect PEAI MC‐treated amplified compared subjected (NC) treatment, evidenced more uniform potential mapping markedly extended lifetime. may arise from higher ratio newly‐formed 2D phase PEA 2 FAPb I 7 PbI 4 film. Consequently, MC‐based solar cell (PSC) achieves champion power conversion efficiency (PCE) 25.28%, surpassing NC‐treated device, which exhibits PCE only 24.01%.

Language: Английский

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Eliminating high-dimensional defects by upward unidirectional crystallization for efficient and stable inverted perovskite solar cells

Energy & Environmental Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Upward unidirectional crystallization is achieved by maximizing the difference in nucleation driving force between top and bottom sides of perovskites, which contributes to efficient stable solar cells with eliminated high-dimensional defects.

Language: Английский

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Enhanced field electron emission of formamidine lead triiodide induced by strong electric field assisted morphology reconstruction

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 162423 - 162423

Published: Jan. 1, 2025

Language: Английский

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Stabilizing Precursor Solutions by Proton‐Rich Additive for High‐Performance Air‐Processed Solar Cells

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

Published: March 10, 2025

Storing perovskite precursor solutions under ambient conditions poses a significant challenge to commercialization, as humidity and oxidation accelerate ageing introduce defects in devices. A major contributor solution impurity phases is the deprotonation of hybrid organic cations, specifically methylammonium (MA+) formamidinium (FA+). In this work, proton-rich additive, 4-(aminomethyl)pyridine 2-iodide, used inhibit MA+ by generating free H+, thereby mitigating degradation cations oxygen stress. The treated stored for several days exhibits no condensation reaction products. Due synergistic effect H+ I-, films exhibit pure phase formation abnormal "aggregate" crystals. Therefore, additive reacts with FA+ form new complexes, termed N-(4-methylpyridine)formamidinium), which efficiently passivate nonradiative defects. Consequently, strategy enables solar cells achieve power conversion efficiency (PCE) 25.25%, demonstrating enhanced long-term stability both light thermal Notably, optimized device retains 95.5% its initial PCE after 1200 h continuous illumination 91.61% 600 at 85 °C 85% relative humidity.

Language: Английский

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Understanding perovskite light-emitting diodes through transmission electron microscopy: materials structure, optical regulation and devices

Nano Energy, Journal Year: 2024, Volume and Issue: unknown, P. 110627 - 110627

Published: Dec. 1, 2024

Language: Английский

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