Reinforcing Coverage of Self‐assembled Monomolecular Layers for Inverted Perovskite Solar Cells with Efficiency of 25.70%

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 30, 2024

Abstract Self‐assembled monolayers (SAM) as hole transport layers have been widely used in high‐efficiency inverted perovskite solar cells (PSCs) exceeded 26 %. However, the poor coverage and non‐uniform distribution on substrate of SAM further restrict improvement device performance. Herein, we utilize mixed strategy via MeO‐2PACz along with perfluorotripropylamine (FC‐3283) to improve coverage, aiming accelerate carrier transport, promote growth, regulate surface energy levels suppress nonradiative recombination. The champion mixed‐SAM achieves an efficiency 25.70 % (certified 25.6 %) long‐term stability (maintained initial 90 after 1000 h 180 under ISOS‐L‐1 ISOS‐L‐2).

Language: Английский

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Direct measurement of electron affinity of carbazole-based self-assembled monolayer used as hole-selective layer in high-efficiency perovskite solar cells

Applied Physics Letters, Journal Year: 2024, Volume and Issue: 124(24)

Published: June 10, 2024

Carbazole-based self-assembled monolayers have received considerable attention as hole-selective layers (HSLs) in inverted perovskite solar cells. As an HSL, the electron-blocking capability is important and directly related to electron affinity (EA). Low-energy inverse photoelectron spectroscopy (LEIPS) most reliable method for EA measurement. However, intense electron-impact-induced fluorescence from carbazole interferes with their By improving photon detector, we were able measure 2PACz MeO-2PACz LEIPS spectra determine respective EAs of 1.72 1.48 eV. These small values ensure effective HSLs regardless type layer.

Language: Английский

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In situ Blending For Co‐Deposition of Electron Transport and Perovskite Layers Enables Over 24% Efficiency Stable Inverted Solar Cells

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

Published: July 18, 2024

Abstract Simplifying the manufacturing processes of multilayered high‐performance perovskite solar cells (PSCs) is yet vital importance for their cost‐effective production. Herein, an in situ blending strategy presented co‐deposition electron transport layer (ETL) and absorber by incorporating (3‐(7‐butyl‐1,3,6,8‐tetraoxo‐3,6,7,8‐tetrahydrobenzo‐ [ lmn ][3,8]phenanthrolin‐2(1 H )‐yl)propyl)phosphonic acid (NDP) into precursor solutions. The phosphonic acid‐like anchoring group coupled with its large molecular size drives migration NDP toward indium tin oxide (ITO) surface to form a distinct ETL during film forming. This circumvents critical wetting issue simultaneously improves interfacial charge collection efficiencies. Consequently, n‐i‐p PSCs based on blended achieve champion power conversion efficiency (PCE) 24.01%, which one highest values using organic ETLs. performance notably higher than that ETL‐free (21.19%) independently spin‐coated (21.42%) counterparts. More encouragingly, dramatically enhances device stability under harsh conditions retaining over 90% initial efficiencies after 250 h 100 °C or 65% humidity storage. Moreover, this universally adaptable various compositions, architectures, materials (ETMs), showing great potential applications diverse optoelectronic devices.

Language: Английский

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Enhancing efficiency and stability in perovskite solar cells: innovations in self-assembled monolayers

Frontiers in Chemistry, Journal Year: 2025, Volume and Issue: 12

Published: Jan. 6, 2025

Perovskite solar cells (PVSCs) show remarkable potential due to their high-power conversion efficiencies and scalability. However, challenges related stability long-term performance remain significant. Self-assembled monolayers (SAMs) have emerged as a crucial solution, enhancing interfacial properties, facilitating hole extraction, minimizing non-radiative recombination. This review examines recent advancements in SAMs for PVSCs, focusing on three key areas: anchoring groups interface engineering, electronic structure modulation well band alignment, optimization. We emphasize the role of reducing defects improving crystallinity, alongside ability fine-tune energy levels more effective extraction. Additionally, co-adsorbed SAM strategies was discussed which can enhance durability PVSCs against thermal moisture degradation. Overall, present promising avenue addressing both efficiency paving way toward commercial viability. Future research should prioritize environmental scaling up applications industrial implementation.

Language: Английский

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Thiophene Substituent Engineering of Carbazole Based Self‐Assembled Monolayers for Use in High‐Performance Inverted Perovskite Solar Cells

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

Published: Feb. 21, 2025

Abstract Carbazole‐based self‐assembled monolayers (SAMs) are widely used in inverted perovskite solar cells (PSCs). However, the biased intermolecular assembly of SAM molecules, and lack Lewis ‐basic heteroatoms to efficiently tune crystallinity perovskites passivate interface defects still limited further improvement efficiency stability for PSCs involving carbazole‐based SAMs. Herein, a novel 3,6‐dithiophene molecule (named CzTh) is designed via substituent engineering strategy, which demonstrated effectively solve obstacles. The theory experiment find that introduction thiophene regulated SAMs with carbazole core terms surface wettability precursor solvent, energy level alignment, crystallization films passivation, attributed dipole moment changes, base property S atom. Consequently, CzTh achieved enhanced power conversion (PCE) excellent air stability, compared commercial (Me‐4PACz). As an “one‐stone‐three‐birds” design strategy SAMs, “thiophene‐substitution” tunes crystallization, passivates defects, enhances hole injection at perovskite/SAMs PSCs.

Language: Английский

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