Hybrid Self‐Assembled Molecular Interlayers for Efficient and Stable Inverted Perovskite Solar Cells

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

Published: Feb. 21, 2025

Abstract Self‐assembled molecules (SAMs) have been widely employed as hole transport layers (HTLs) in inverted perovskite solar cells (PSCs). However, the carbazole core of [4‐(3,6‐dimethyl‐9H‐carbazol‐9‐yl)butyl]phosphonic acid (Me‐4PACz) is insufficiently effective for passivating defects at “bottom” films, and weak anchoring ability phosphate groups toward NiO x substrate appears to promote formation dimers, trimers, higher‐order oligomers, resulting molecular accumulation. Herein, a novel technique proposed combine Me‐4PACz with different thiol modify buried interface PSCs. Molecular dynamics simulations infrared scattering‐type scanning near‐field optical microscopy (IR s‐SNOM) results show that co‐depositing forms hybrid SAMs densely uniformly cover surface. The island‐like structure serves template forming bulk heterojunction composed interpenetrating networks MA‐rich FA‐rich domains, enabling efficient charge generation suppressed bimolecular recombination. Particularly, (3‐mercaptopropyl) trimethoxysilane (MPTMS) effectively prevents aggregation by multi‐dentate anchor on surface through hydrolytic condensation ─OCH 3 groups, while its ─SH passivate uncoordinated Pb 2+ perovskite/HTL interface. Consequently, SAMs‐modified PSC achieve champion photoelectric conversion efficiency (PCE) 25.4% demonstrated better operational stability.

Language: Английский

Fluorine-substituted bifunctional molecules for enhanced perovskite solar cell performance

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159876 - 159876

Published: Jan. 1, 2025

Language: Английский

Synergistic Passivation Strategies for Enhancing Efficiency and Stability of Perovskite Solar Cells

Energy Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 12, 2024

Perovskite solar cells (PSCs) are celebrated for their potential in clean and renewable energy applications. However, performance longevity often compromised by surface grain boundary defects. Herein, a posttreatment strategy using 4‐hydroxy‐4′‐biphenylcarboxylic acid ethyl ester (EHBC) is introduced to passivate these defects perovskite films, thereby enhancing the of PSCs. As Lewis base, carbonyl group EHBC interacts with uncoordinated lead ions vacancy defects, while hydroxyl forms hydrogen bonds iodide ions, reducing migration. Additionally, hydrophobic biphenyl groups enhance resistance moisture. The study demonstrates that PSCs treated retain 69% initial after 700 h under 30% relative humidity, achieving maximum power conversion efficiency (PCE) 24.48%, significant improvement over untreated control (PCE = 23.04%). This synergistic passivation offers an effective approach fabricating high‐efficiency stable

Language: Английский