An Energy Level Alignment Study of 2PACz Molecule on Perovskite Device‐Related Interfaces by Vacuum Deposition

Advanced Energy and Sustainability Research, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Self‐assembling molecules (SAM) have been widely used in inverted perovskite solar cells (PSC) as a hole transfer layer due to nearly lossless charge giving excellent device performance. However, the energy level alignment between SAM‐ and PSC‐related interfaces has not systematically studied. Herein, 2PACz, typical SAM with largest dipole moment, is chosen model system studied by vacuum deposition. It found that determined orientation of 2PACz on different substrate. The are lying down highly oriented pyrolytic graphite zero interface dipole. On solvent‐cleaned plasma‐treated indium tin oxide (ITO) substrates, vertically assembled 0.22 0.13 eV work function increases, respectively. sputtered ITO, upside orientation, 0.51 decrease. change strong interaction oxygen vacancies ITO substrate carbazole head group 2PACz. film, also shows slightly upward additional passivation free MA + ions. it confirmed plays an important role extraction.

Language: Английский

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A Brief Review on Self-Assembled Monolayers in Organic Solar Cells: Progress, Challenges, and Future Prospects

ACS Applied Electronic Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 22, 2025

Over the past decade, organic solar cells (OSCs) have made noticeable progress in photovoltaic performance thanks to emergence of electron acceptors capable intramolecular charge transfer, namely, nonfullerene small molecules. OSCs continue gain momentum by employing self-assembled monolayers (SAMs) as transport layers, particularly those involving conjugated system their functional groups and/or spacers. This review provides an overview SAMs, covering molecular designs, fabrication methods, and various functions OSCs. Additionally, it highlights currents issues surrounding along with efforts address them future perspectives.

Language: Английский

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Charge Carrier Dynamics at the Perovskite Interface with Self-Assembled Monolayers

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(43), P. 59477 - 59487

Published: Oct. 18, 2024

Self-assembled monolayers (SAMs) deposited on the hole-collecting electrodes of p-i-n perovskite solar cells effectively replace bulky hole transporting layers. However, mechanism by which control electronic processes and how they depend properties monolayer molecules remain poorly understood. In this study, we developed a simplified cell imitator with blocked electron extraction to investigate photocurrent dynamics between ITO electrode. We investigated photoluminescence photovoltage under short laser pulse excitation addressed influence monomolecular transport Our findings reveal that is significantly affected layers, in turn methods sample preparation exploration. Photocurrent determined several processes, including charge carrier displacement local electric field, ITO, trapping holes interface trap states, electron-hole recombination at interface. propose model takes into account molecular dipole moments their ionization potentials partially explain different influences interfacial rates. Additionally, also strongly depends illumination shows memory effects persist over minutes hours are attributed redistribution ions.

Language: Английский

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Achieving 32% Efficiency in Perovskite/Silicon Tandem Solar Cells with Bidentate‐Anchored Superwetting Self‐Assembled Molecular Layers

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: April 2, 2025

The inhomogeneity of hole-selective self-assembled molecular layers (SAMLs) often arises from the insufficient bonding between anchors and metal oxide, particularly on textured silicon surfaces when fabricating monolithic perovskite/silicon tandem solar cells (P/S-TSCs) hydrophobic carbazole complicates fabrication high-quality perovskite films. To address this, we developed a novel bidentate-anchored superwetting aromatic SAM based an upside-down core as layer (HSL), denoted ((9H-carbazole-3,6-diyl)bis(4,1-phenylene))bis(phosphonic acid) (2PhPA-CzH). bisphosphonate-anchored exhibited enhanced adsorption capabilities efficient hole extraction/transport, reversely substituted ring contributed friendly super wetting underlayer that enabled films with minimized energetic mismatches, which 2PhPA-CzH played pivotal role in dual interfacial energy regulation. Through these advancements, optimized wide-bandgap (1.68 eV) PSCs demonstrated improved PCE 22.83% excellent stability T90 exceeding 1000 h under damp-heat conditions (ISOS-D-3, 85% RH, 85 °C), representing one best performances for SAMs HSL-based PSCs. Notably, 2PhPA-CzH-functionalized recombination extended to submicron-pyramid texture SHJ fabricate P/S-TSCs, achieving impressive efficiency 32.19% at active area 1 cm2 (certified 31.54%) while maintaining photostability. This work offers guidance designing multidentate-anchored realize record P/S-TSCs.

Language: Английский

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Achieving 32% Efficiency in Perovskite/Silicon Tandem Solar Cells with Bidentate‐Anchored Superwetting Self‐Assembled Molecular Layers

Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown

Published: April 2, 2025

Abstract The inhomogeneity of hole‐selective self‐assembled molecular layers (SAMLs) often arises from the insufficient bonding between anchors and metal oxide, particularly on textured silicon surfaces when fabricating monolithic perovskite/silicon tandem solar cells (P/S‐TSCs) hydrophobic carbazole complicates fabrication high‐quality perovskite films. To address this, we developed a novel bidentate‐anchored superwetting aromatic SAM based an upside‐down core as layer (HSL), denoted ((9H‐carbazole‐3,6‐diyl)bis(4,1‐phenylene))bis(phosphonic acid) (2PhPA‐CzH). bisphosphonate‐anchored exhibited enhanced adsorption capabilities efficient hole extraction/transport, reversely substituted ring contributed friendly super wetting underlayer that enabled films with minimized energetic mismatches, which 2PhPA‐CzH played pivotal role in dual interfacial energy regulation. Through these advancements, optimized wide‐bandgap (1.68 eV) PSCs demonstrated improved PCE 22.83% excellent stability T 90 exceeding 1000 h under damp‐heat conditions (ISOS‐D‐3, 85% RH, 85 °C), representing one best performances for SAMs HSL‐based PSCs. Notably, 2PhPA‐CzH‐functionalized recombination extended to submicron‐pyramid texture SHJ fabricate P/S‐TSCs, achieving impressive efficiency 32.19% at active area 1 cm 2 (certified 31.54%) while maintaining photostability. This work offers guidance designing multidentate‐anchored realize record P/S‐TSCs.

Language: Английский

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Unveiling the Influence of Additive Acidity on the Long-Term Stability of Perovskite Solar Cells

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 7(1), P. 265 - 274

Published: Dec. 17, 2024

Additive engineering plays a vital role in enhancing perovskite solar cells (PSCs) by passivating defects within the films. Carboxyl and ester groups are commonly used for their strong binding with under-coordinated Pb2+ ions. However, impact of additive acidity on long-term stability PSCs remains unclear. This study investigates functional roles 4-amino-3,5-difluorobenzoic acid (DFAB-A) methyl 4-amino-3,5-difluorobenzoate (DFAB-AM), which could effectively passivate film defects. resulting from carboxyl deprotonation DFAB-A negatively impacts structural perovskites. In contrast, DFAB-AM its functionality forms stronger more stable bonds, contributing to improved passivation stability. incorporating achieve high power conversion efficiency 22.51% maintain 84.3% initial after 800 h maximum-power-point operation. These findings underscore importance carbonyl group design developing molecular additives enhance both durability PSCs.

Language: Английский

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Ordered self-assembled monolayer improved the buried interface of wide bandgap perovskite for efficient and stable semi-transparent solar cells

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 158499 - 158499

Published: Dec. 1, 2024

Language: Английский

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