Tuning Polymer Dipole Moment of Hole Transport Materials with a Glycol Ethyl Substituted Strategy for Inverted Perovskite Solar Cells DOI Open Access

Xuanang Luo,

Sen Yin,

Zhihui Xiong

et al.

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

Published: March 10, 2025

Abstract The dipole moment of hole transport materials (HTMs) plays a vital role in improving the photovoltaic performance inverted perovskite solar cells (PSCs). However, manipulating moments polymer HTMs, which have great operational and bias stability, remains challenging. In this work, HTMs with varying lengths glycol side chains, PTAC‐DEG PTAC‐TEG, are developed. Using random‐walk model extended from chain conformation, (with shorter chains) achieves higher cumulative than PTAC‐TEG. This finding can be attributed to fact that smaller angles enable better alignment, while larger PTAC‐TEG promote aggregation reduces integrated moment. Perovskite films on show enhanced crystallinity lower trap density due improved interfacial charge transport, stronger built‐in electric field, affinity dipole. devices achieve PCE 25.8%, is among highest for PSCs based exhibit outstanding stability under ISOS‐L‐3 (t 95 = 1300 h) ISOS‐D‐3 1200 conditions. study highlights modulation as promising strategy designing efficient, stable cells.

Language: Английский

Co-adsorbed self-assembled monolayer enables high-performance perovskite and organic solar cells DOI Creative Commons
Dongyang Li, Qing Lian,

Tao Du

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Sept. 1, 2024

Self-assembled monolayers (SAMs) have become pivotal in achieving high-performance perovskite solar cells (PSCs) and organic (OSCs) by significantly minimizing interfacial energy losses. In this study, we propose a co-adsorb (CA) strategy employing novel small molecule, 2-chloro-5-(trifluoromethyl)isonicotinic acid (PyCA-3F), introducing at the buried interface between 2PACz perovskite/organic layers. This approach effectively diminishes 2PACz's aggregation, enhancing surface smoothness increasing work function for modified SAM layer, thereby providing flattened with favorable heterointerface perovskite. The resultant improvements crystallinity, minimized trap states, augmented hole extraction transfer capabilities propelled power conversion efficiencies (PCEs) beyond 25% PSCs p-i-n structure (certified 24.68%). OSCs CA achieve remarkable PCEs of 19.51% based on PM1:PTQ10:m-BTP-PhC6 photoactive system. Notably, universal also been achieved other two popular OSC systems. After 1000-hour maximal point tracking, encapsulated retain approximately 90% 80% their initial PCEs, respectively. introduces facile, rational, effective method to enhance performance SAMs, realizing efficiency breakthroughs both device structure, along improved operational stability. are essential high Here, authors develop molecule provide heterointerface, devices.

Language: Английский

Citations

48
Pros and cons of hole-selective self-assembled monolayers in inverted PSCs and TSCs: extensive case studies and data analysis DOI
Chi Li, Yong Chen, Zilong Zhang

et al.

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(17), P. 6157 - 6203

Published: Jan. 1, 2024

HSSAMs with diverse structures, encompassing various anchoring and functional groups, were systematically categorized their multifaceted roles in inverted PSCs TSCs correlation device performance investigated.

Language: Английский

Citations

24
Enlarging moment and regulating orientation of buried interfacial dipole for efficient inverted perovskite solar cells DOI Creative Commons
Peng Yang, Yu Chen,

Jing Zhou

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Feb. 1, 2025

Carrier transport and recombination at the buried interface of perovskite have seriously restricted further development inverted solar cells (PSCs). Herein, an interfacial dipolar chemical bridge strategy to address this issue is presented. 2-(Diphenylphosphino) acetic acid (2DPAA) selected as linker reconstruct dipole, which effectively enlarges dipole moment 5.10 D optimizes a positive orientation, thereby accelerating vertical hole transport, suppressing nonradiative promoting crystallization. The champion device yields high power conversion efficiency (PCE) 26.53% (certified 26.02%). Moreover, extended wide-bandgap large-area devices, delivers PCEs 22.02% 24.11%, respectively. optimized devices without encapsulation also demonstrate great long-term shelf operational stability. Our work highlights importance orientation realize efficient stable PSCs. hindered cells. Here, authors employ achieving maximum 24.11% for small-

Language: Английский

Citations

6
Tailored Lattice-Matched Carbazole Self-Assembled Molecule for Efficient and Stable Perovskite Solar Cells DOI

Hongzhuo Wu,

Jiaxin Wu,

Zuhong Zhang

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: 147(9), P. 8004 - 8011

Published: Feb. 18, 2025

Self-assembled monolayer molecules have been widely employed as interfacial transport materials in inverted perovskite solar cells (PSCs), demonstrating high efficiency and improved device stability. However, self-assembling (SAM) often suffer from aggregation weak interactions with the layer, resulting inefficient charge transfer significant energy losses, ultimately limiting power conversion long-term stability of cells. In this work, we developed a series novel skeleton-matching carbazole isomer SAMs based on following key design principles: (1) introducing benzene ring structure to distort molecular skeleton SAM, thereby preventing achieving uniform distribution fluorine-doped tin oxide (FTO) substrates; (2) strategically incorporating methoxy groups onto at different positions (ortho, meta, para). These functional not only increase anchoring points layer but also fine-tune dipole moment. Among SAMs, m-PhPACz exhibits most favorable properties, maximum moment 2.4 D an O-O distance that aligns excellently diagonal lead ions adjacent lattice, enhancing SAM-perovskite interactions, facilitating efficient extraction, improving As result, new SAM-based PSCs achieved impressive 26.2%, 12.9% improvement. Moreover, devices demonstrated outstanding photothermal stability, retaining 96% their initial PCE after 1000 h 85 °C maintaining 90% 300 UV-light exposure.

Language: Английский

Citations

6
Constructing Stable Perovskite with Small Molecule Bridge Interface Passivation DOI Open Access
Kai Wang,

Bo Yu,

Changqing Lin

et al.

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

Published: Jan. 5, 2025

Abstract The interfaces of each layer in perovskite solar cells (PSCs) have a significant impact on the charge transfer and recombination. Especially, interface between hole transport (HTL) p‐i‐n type PSCs significantly affects contact characteristics HTL perovskite, hindering further improvements performance stability. Herein, small molecule 9‐Fluorenylmethoxycarbonyl chloride (9‐YT) is introduced as bridge for PSCs, which enhances interaction self‐assembly molecules (SAMs) perovskite. conjugated backbone 9‐YT can interact with SAM (MeO‐2PACz) by π–π stacking reaction. Moreover, also improves interfacial through strong interactions where carbonyl groups Cl atoms uncoordinated Pb 2+ layer. incorporation demonstrated to markedly enhance extraction at perovskite/hole interface, optimize energy level alignment, mitigate recombination, passivate defects Finally, device treated achieves power conversion efficiency (PCE) 24.82%. At same time, still maintain 92.6% original PCE after long‐term stability test 1200 h.

Language: Английский

Citations

4
Versatile Energy-Level-Tunable Hole-Transport Layer for Multi-Composition Inverted Perovskite Solar Cells DOI
Wenbo Peng, Yong Zhang,

Xianyong Zhou

et al.

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 30, 2024

Through a bimolecular energy-level-tunable design, an ET-HTL reaches optimal energy level alignment with three different perovskite compositions, providing balanced interface defect passivation, charge extraction, and transition loss suppression.

Language: Английский

Citations

18
Binary Organic Solar Cells with >19.6% Efficiency: The Significance of Self-Assembled Monolayer Modification DOI
Xiaokang Sun,

Xiaoman Ding,

Fei Wang

et al.

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(9), P. 4209 - 4217

Published: Aug. 1, 2024

Improving the uniformity and density of self-assembled monolayers (SAMs) is crucial to elevate photovoltaic performance organic solar cells (OSCs). Herein, we introduced small molecules 1-hydroxybenzotriazole (HOBT) modulate distribution electrical properties (4-(7H-dibenzo[c,g]carbazol-7-yl)butyl)phosphonic acid (4PADCB) on indium tin oxide (ITO) transparent electrodes in an innovative manner. The hydroxyl group HOBT interacts with phosphate SAMs, while steric repulsion exerted by backbone efficiently regulates SAMs. This led a more uniform dense SAMs ITO. Furthermore, HOBT-modified have improved crystallization vertical phase separation upper active layer. Consequently, PM6:BTP-eC9 binary OSCs based exhibit impressive PCE 19.66%. Our work presents effective strategy for regulating SAM morphology offers promising approach advancing OSCs.

Language: Английский

Citations

14
Dual functionality of charge extraction and interface passivation by self-assembled monolayers in perovskite solar cells DOI
Muhammad Azam, Tian Du, Zhongquan Wan

et al.

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(19), P. 6974 - 7016

Published: Jan. 1, 2024

This review overviews the challenges at buried interface of PSCs, defect passivation capabilities SAMs, and its effectiveness compared to other passivating agents.

Language: Английский

Citations

14
Hybrid Self‐Assembled Molecular Interlayers for Efficient and Stable Inverted Perovskite Solar Cells DOI Open Access

Shuguang Cao,

Shizi Luo,

Tongjun Zheng

et al.

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

Citations

2
Reinforcing Coverage of Self‐assembled Monomolecular Layers for Inverted Perovskite Solar Cells with Efficiency of 25.70% DOI Open Access
Xiwen Zhang, Yang Wang, Kun Zhang

et al.

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

Citations

7